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Social science to accelerate coastal adaptation to sea-level rise

Published online by Cambridge University Press:  29 August 2023

Xénia Philippenko*
Affiliation:
BRGM, 45060 Orléans, France CNRS, LGP UMR 8591, Université Paris 1, Paris, France
Gonéri Le Cozannet
Affiliation:
BRGM, 45060 Orléans, France
*
Corresponding author: Xénia Philippenko; Email: [email protected]
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Abstract

The latest IPCC report estimates that approximately 1 billion people will be at risk from coastal hazards in the near term due to coastal population increase, sea-level rise and other coastal changes. This will occur in a world that is changing rapidly due to climate change, ecosystem decline, human development and the projected transformations of the economy to meet the objectives of the Paris Agreement. In this context, social sciences provide a pivotal perspective to coastal adaptation, for example, while assessing barriers and opportunities across scales, from local to global. This scoping review explores how social sciences support coastal adaptation. We show that Political Sciences, Economics, Sociology and Geography are already supporting coastal adaptation. Yet, scientific fields such as legal sciences, psychology, history and archaeology as well as anthropology and ethnography are less developed in the context of coastal adaptation to sea-level rise. New research avenues could also integrate education, media and communication research and aim at truly interdisciplinary studies linking different branches of social sciences with coastal science and climate services. This effort could help moving from a coastal adaptation often focused on coastal engineering protection to a broader vision of coastal resilient development, also addressing the challenges of mitigation, sustainable development and coastal ecosystem decline.

Type
Review
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2023. Published by Cambridge University Press

Impact statement

Coastal adaptation is a major challenge for todays’ and future coastal communities due to ongoing and future sea-level rise. Coastal researchers and practitioners are exploring idealised coastal adaptation pathways, assuming an effective implementation of a large panel of solutions across space and time scales. Yet, empirical studies show that the implementation of adaptation is often lagging behind plans or expectations. Social sciences can help enabling coastal adaptation by providing a clearer picture of adaptation barriers and opportunities across scales, from local to global. Our scoping review shows that the contribution of social sciences applied to coastal adaptation is currently limited in scope and geographical coverage: the literature is dominated by political sciences, economics, sociology and geography. Legal sciences, psychology, history and archaeology, anthropology and ethnography, education, media and communication research can support adaptation, but they are currently providing less coastal adaptation applications. We suggest to expand the scope of social research supporting coastal adaptation, with specific attention to geographical coverage, coastal context and interdisciplinarity. Because every coastal location and community is different, no unique solution can be delivered or replicated across coastal regions in response to sea-level rise. We suggest that a global social research effort involving coastal stakeholders, exposed communities, climate services providers and scientists can support coastal adaptation efficiently. This could support communities engaging into broader social and economic transformations allowing to meet the Sustainable Development Goals in coastal areas and achieve coastal resilient development.

Introduction

Coastal zones have changed drastically over the last centuries due to natural processes and human interventions driven by population growth, economic development and new land use practices (Brown et al., Reference Brown, Nicholls, Hanson, Brundrit, Dearing, Dickson, Gallop, Gao, Haigh, Hinkel and Jiménez2014). Since a few decades, climate change has increasingly becoming a major driver of change. For example, early impacts such as high-tide flooding are increasingly being reported (IPCC, Reference Pörtner, Roberts, Poloczanska, Mintenbeck, Tignor, Alegría, Craig, Langsdorf, Löschke, Möller and Okem2022). Yet these events are only the onset of much larger changes along the global coastlines, as it is already well established that sea levels are committed to rise between 0.5 and 7 m, and potentially up to 15 m by 2,300 depending on future greenhouse gas emissions and the velocity of ice-sheets melting (IPCC, Reference Masson-Delmotte, Zhai, Pirani, Connors, Péan, Berger, Caud, Chen, Goldfarb, Gomis, Huang, Leitzell, Lonnoy, Matthews, Maycock, Waterfield, Yelekçi, Yu and Zhou2021).

Such large changes in sea levels will fundamentally change coastal socio-ecosystems worldwide. In this context, an important challenge for coastal stakeholders is to agree on long-term objectives and to identify potential pathways to achieve them. For example, coastal stakeholders may anticipate relocation on the long term, while developing some coastal protections now in order to operate some infrastructure for a few more decades (Figure 1). Such long-term objectives can contribute to climate-resilient development in coastal areas where it minimises the risks from climate change through mitigation and adaptation (Schipper et al., Reference Schipper, Revi, Preston, Carr, Eriksen, Fernandez-Carril, Glavovic, Hilmi, Ley, Mukerji, Muylaert de Araujo, Perez, Rose, Singh, Pörtner, Roberts, Tignor, Poloczanska, Mintenbeck, Alegría, Craig, Langsdorf, Löschke, Möller, Okem and Rama2022), while also achieving sustainable development goals and reducing biodiversity losses (hereafter: coastal resilient development).

Figure 1. Idealised adaptation pathway leading to coastal resilient development, based on typical settings in Europe. During the 20th century, engineering protection has been the mainstream coastal risk prevention measure. This measure is becoming increasingly costly and may face adaptation limits when sea-level rise exceeds some site-specific thresholds or rates. New measures such as ecosystem-based protection or accommodation (actions to reduce vulnerability, for example, raising houses, developing early warning systems…) are being increasingly experimented locally. The feasibility of relocation is often limited today due to social and economic interest. Yet relocation may become mainstream and may be part of coastal resilient development in the future above site-specific sea levels. Figure inspired by Bednar-Friedl et al. (Reference Bednar-Friedl, Biesbroek, Schmidt, Alexander, Børsheim, Carnicer, Georgopoulou, Haasnoot, Le Cozannet, Lionello, Lipka, Möllmann, Muccione, Mustonen, Piepenburg, Whitmarsh, Pörtner, Roberts, Tignor, Poloczanska, Mintenbeck, Alegría, Craig, Langsdorf, Löschke, Möller, Okem and Rama2022) and IPCC (Reference Pörtner, Roberts, Poloczanska, Mintenbeck, Tignor, Alegría, Craig, Langsdorf, Löschke, Möller and Okem2022).

In an optimistic perspective, it can be assumed that adaptation will be implemented in an optimal way. Such optimistic postures have been studied by psychology (Lammel et al., Reference Lammel, Guillen Gutierrez, Dugas and Jamet2013) and observed in the population (Philippenko et al., Reference Philippenko, Goeldner-Gianella, Le Cozannet, Grancher and De La Torre2021). Strategies to achieve coastal resilient development can be spelt out in adaptation pathways (Haasnoot et al., Reference Haasnoot, Kwakkel, Walker and Ter Maat2013). From an engineering perspective, adaptation pathways have proven effective to identify when different options can be planned and implemented (Ranger et al., Reference Ranger, Reeder and Lowe2013). Yet, the fact that an adaptation pathway is efficient from an engineering point of view does not mean that it will receive public and institutional support. On the contrary, empirical evidence shows that social barriers very often explain the lack of implementation of coastal adaptation (Hinkel et al., Reference Hinkel, Aerts, Brown, Jiménez, Lincke, Nicholls, Scussolini, Sanchez-Arcilla, Vafeidis and Addo2018). Consequently, current adaptation is rarely transformational, that is, engaging into a pathway that may lead to coastal resilient in the long term (Figure 1; Bednar-Friedl et al., Reference Bednar-Friedl, Biesbroek, Schmidt, Alexander, Børsheim, Carnicer, Georgopoulou, Haasnoot, Le Cozannet, Lionello, Lipka, Möllmann, Muccione, Mustonen, Piepenburg, Whitmarsh, Pörtner, Roberts, Tignor, Poloczanska, Mintenbeck, Alegría, Craig, Langsdorf, Löschke, Möller, Okem and Rama2022). Hence, engaging into a pathway leading to coastal resilient development will require overcoming social and institutional barriers (Schipper et al., Reference Schipper, Revi, Preston, Carr, Eriksen, Fernandez-Carril, Glavovic, Hilmi, Ley, Mukerji, Muylaert de Araujo, Perez, Rose, Singh, Pörtner, Roberts, Tignor, Poloczanska, Mintenbeck, Alegría, Craig, Langsdorf, Löschke, Möller, Okem and Rama2022).

In this context, social sciences can play a key role. Social sciences can be defined as the fields studying human societies, the way people live, the social interactions between individuals or groups and their environment, which include the study of culture, values, behaviours, policy and management, all crucial elements for adaptation to climate change (Weaver et al., Reference Weaver, Mooney, Allen, Beller-Simms, Fish, Grambsch, Hohenstein, Jacobs, Kenney, Lane, Langner, Larson, McGinnis, Moss, Nichols, Nierenberg, Seyller, Stern and Winthrop2014; Victor, Reference Victor2015). They developed as an academic scientific field in the 19th century (Ross, Reference Ross, Farr and Seidelman1993, Reference Ross, Ross and Porter2003) as they emerged from older research fields, such as history, philosophy and natural history. Their development was first carried out through learned societies and some pioneer’s figures, like Alexis de Tocqueville, Alexander von Humboldt, Auguste Comte, Karl Marx and Adam Smith. Philosophy plays an important role in the process of separating and classifying different social disciplines (Moon and Blackman, Reference Moon and Blackman2014; Benton and Craib, Reference Benton and Craib2023) – several of the pioneering figures are philosophers –, and philosophy will remain one of the ways in which the social sciences reflect on themselves over the decades. By the end of the 19th century, social sciences began to structure and distinguish themselves from one another, developing their own methods and research topics. They gather around institutions, journals such as the Annales de Géographie in France, schools of thought like the Chicago School in the United States, under the impulse of some major figures, like Emile Durkheim, Sigmund Freud, Max Weber and Franz Boaz. In the second half of the 20th century, social sciences expanded and specialised, generating multiple currents within the disciplines and giving rise to new fields of research, led by numerous researchers like Michel Foucault, Hannah Arenth, Claude Levi-Strauss, Pierre Bourdieu, Amartya Sen, Paul Lazarsfeld and many others.

Nowadays, there is no strict classification of social sciences, particularly in what distinguishes them from the human sciences (Schmaus, Reference Schmaus, Turner and Risjord2007; Guns et al., Reference Guns, Sile, Eykens, Verleysen and Engels2018; Vancauwenbergh and Poelmans, Reference Vancauwenbergh and Poelmans2019; Eykens et al., Reference Eykens, Guns and Engels2021; Sīle et al., Reference Sīle, Guns, Vandermoere, Sivertsen and Engels2021). A broad classification could be given, considering the human sciences as centred on the individual and the social sciences as centred on social groups and societies. Here we rely on the commonly used Revised Field of Science and Technology (FOS) classification of the Organisation for Economic Co-operation and Development (OECD) to conduct studies (OECD, 2007). According to this classification, social sciences include Psychology, Economics and Business, Educational Sciences, Sociology, Law, Political Science, Geography and Media and Communication (OECD, 2007). We also add to this classification Ethnography and Anthropology, and History, which are classified by the OECD as Humanities but which we consider part of the social sciences, as they study the way human societies and groups structured themselves.

In this article, we explore how social research can enable coastal adaptation, and, more broadly, climate-resilient development in coastal zones. We carried out a scoping review, based on a search, selection and assessment of the existing literature using a keyword search on Web of Sciences (See details in Supplementary Material S1) and completing this with additional studies, for example, from the IPCC AR6 report. Because of this methodological choice and of the perimeter of a scoping review, we acknowledge that a large part of the literature in certain disciplines has been left out, including social studies published in languages other than English. Furthermore, the results depend on the specific words used in the literature and within our keyword search procedure. Despite these limitations, our work makes it possible to better characterise the type of scientific material that can be used in international reports such as the IPCC.

This review is organised as follows: Section ‘Current and potential role of social science in enabling coastal adaptation’ reviews existing studies involving social sciences in the context of coastal adaptation to sea-level rise. This section identifies branches of social sciences where there are numerous studies on coastal adaptation to sea-level rise, those that are characterised by limited number of studies, and finally those with a very limited number of studies available (Supplementary Material S2 and Tables 13). In section ‘Discussion’, we discuss the findings from the review and suggest new challenges. Specifically, we summarise, based on this review, important inputs from social sciences to coastal adaptation and how social science inputs to coastal adaptation can be strengthened and how a research effort could support coastal resilient development.

Current and potential role of social science in enabling coastal adaptation

Since the first IPCC reports, social sciences have increasingly contributed to climate research (Kelly and Adger, Reference Kelly and Adger2000; Adger, Reference Adger2003; Pelling and High, Reference Pelling and High2005; Smit and Wandel, Reference Smit and Wandel2006; Adger et al., Reference Adger, Dessai, Goulden, Hulme, Lorenzoni, Nelson, Naess, Wolf and Wreford2009). Their contributions to climate science, and particularly to adaptation science, have been acknowledged by many researchers (Conrad, Reference Conrad2009; ISSC/UNESCO, 2013; Weaver et al., Reference Weaver, Mooney, Allen, Beller-Simms, Fish, Grambsch, Hohenstein, Jacobs, Kenney, Lane, Langner, Larson, McGinnis, Moss, Nichols, Nierenberg, Seyller, Stern and Winthrop2014; Ford et al., Reference Ford, Cameron, Rubis, Maillet, Nakashima, Willox and Pearce2016; Holm and Winiwarter, Reference Holm and Winiwarter2017; Fouqueray and Frascaria-Lacoste, Reference Fouqueray and Frascaria-Lacoste2020). Yet, they remain insufficiently considered according to a part of the climate science community (Yearley, Reference Yearley2009; Weaver et al., Reference Weaver, Mooney, Allen, Beller-Simms, Fish, Grambsch, Hohenstein, Jacobs, Kenney, Lane, Langner, Larson, McGinnis, Moss, Nichols, Nierenberg, Seyller, Stern and Winthrop2014; Victor, Reference Victor2015).

The IPCC AR6 partly responds to this criticism by developing narratives that consider socio-economic challenges: it considers the social dimension of risk, indigenous knowledge, climate justice and equity, points out the importance of socio-economic and behavioural conditions to enable adaptation and gives an increasing space to governance issues and challenges (IPCC, Reference Pörtner, Roberts, Poloczanska, Mintenbeck, Tignor, Alegría, Craig, Langsdorf, Löschke, Möller and Okem2022). Nevertheless, economics and governance remain a prominent entry point for social sciences in IPCC reports. This suggests that social sciences could make a greater contribution to climate change adaptation research and operations (Figure 2).

Figure 2. Social sciences in the context of coastal adaptation. The figure shows how social sciences are positioned in the context of coastal adaptation implementation. It highlights the unequal number of studies available in the peer-reviewed literature depending on each branch of social sciences.

Based on the classification presented above, we explore how the 10 social science fields identified in section ‘Introduction’ support coastal adaptation: Tables 13 summarise for each of these 10 disciplines the type of studies and analysis they can provide and present their contributions to enable coastal adaptation to sea-level rise. When articles provide information on their theoretical foundations, Tables 13 also distinguish between applied and theory-driven studies, noting that this information is not always provided, as reported by Kuhlicke et al. (Reference Kuhlicke, Madruga de Brito, Bartkowski, Botzen, Doğulu, Han, Hudson, Nuray Karanci, Klassert, Otto, Scolobig, Moreno Soares and Rufat2023).

Tables 13 show that the 10 social science disciplinary fields identified in section ‘Introduction’ based on OECD (2007) are not equally contributing to coastal adaptation, as shown in Figure 2 and Supplementary Material S2 as well. Some disciplines or some currents within these disciplines remain under-represented, such as Psychology or History or Communication and Educational Sciences, while others are the subject of a more extensive literature, such as Political Sciences or Economic analysis (Supplementary Material S2). In the remainder of this section, we examine successively social sciences for which numerous studies on coastal adaptation to sea-level rise are available, that is, more than 50 to several hundred studies depending on the discipline (section ‘Social sciences delivering numerous studies on coastal adaptation to sea-level rise’), those that are characterised by a more limited number of studies, that is, around 20 studies per discipline (section ‘Social sciences delivering a more limited number of studies on coastal adaptation to sea-level rise’) and finally those for which only a very limited number of studies can be identified, that is, less than 20 studies available per discipline (section ‘Social sciences delivering a very limited number of studies on coastal adaptation to sea-level rise’).

Social sciences delivering numerous studies on coastal adaptation to sea-level rise

Local or global conditions enabling coastal adaptation are explored by a significant and growing number of studies, notably in Political Sciences (Table 1). This literature has a particular focus on decision-making and assesses local, national and sub-national coastal adaptation policies (Aguiar et al., Reference Aguiar, Bentz, Silva, Fonseca, Swart, Santos and Penha-Lopes2018; Reckien et al., Reference Reckien, Salvia, Heidrich, Church, Pietrapertosa, De Gregorio-Hurtado, D’Alonzo, Foley, Simoes, Krkoška Lorencová, Orru, Orru, Wejs, Flacke, Olazabal, Geneletti, Feliu, Vasilie, Nador, Krook-Riekkola, Matosović, Fokaides, Ioannou, Flamos, Spyridaki, Balzan, Fülöp, Paspaldzhiev, Grafakos and Dawson2018; Olazabal et al., Reference Olazabal, de Gopegui, Tompkins, Venner and Smith2019; Gussmann and Hinkel, Reference Gussmann and Hinkel2021), drivers of adaptation (Simonet and Leseur, Reference Simonet and Leseur2019; Gussmann and Hinkel, Reference Gussmann and Hinkel2020; Landauer et al., Reference Landauer, Rasmus and Forbes2021), needs, priorities and perspectives of stakeholders (Frazier et al., Reference Frazier, Wood and Yarnal2010; Hinkel et al., Reference Hinkel, Church, Gregory, Lambert, Cozannet, Lowe, McInnes, Nicholls, Pol and Wal2019; Terorotua et al., Reference Terorotua, Duvat, Maspataud and Ouriqua2020; van Ginkel et al., Reference van Ginkel, Botzen, Haasnoot, Bachner, Steininger, Hinkel, Watkiss, Boere, Jeuken, de Murieta and Bosello2020), the question of citizen engagement (Jarvis et al., Reference Jarvis, Bollard Breen, Krägeloh and Billington2015; Wamsler et al., Reference Wamsler, Alkan-Olsson, Björn, Falck, Hanson, Oskarsson, Simonsson and Zelmerlow2020; Areia et al., Reference Areia, Costa and Tavares2022), the articulation of scales of governance across local, national or sub-national institutions (Agrawal, Reference Agrawal2008; Petzold and Magnan, Reference Petzold and Magnan2019; Petzold and Ratter, Reference Petzold and Ratter2019; Therville et al., Reference Therville, Brady, Barreteau, Bousquet, Mathevet, Dhenain, Grelot and Brémond2019; Rocle et al., Reference Rocle, Dachary-Bernard and Rey-Valette2021), global or local barriers to adaptation (Eisenack et al., Reference Eisenack, Moser, Hoffmann, Klein, Oberlack, Pechan, Rotter and Termeer2014; Waters et al., Reference Waters, Barnett and Puleston2014; Simonet and Leseur, Reference Simonet and Leseur2019; Whitney and Ban, Reference Whitney and Ban2019; Lee et al., Reference Lee, Paavola and Dessai2022), as well as decision-making under uncertainty (Walker et al., Reference Walker, Haasnoot and Kwakkel2013; Kwakkel et al., Reference Kwakkel, Haasnoot and Walker2016; Lawrence et al., Reference Lawrence, Bell and Stroombergen2019; Lawrence et al., Reference Lawrence, Haasnoot and Lempert2020). The latter is a particularly important issue in coastal areas, where stakeholders have to deal with a very wide range of sea-level rise projections (Fox-Kemper et al., Reference Fox-Kemper, Hewitt, Xiao, Aðalgeirsdóttir, Drijfhout, Edwards, Golledge, Hmer, Kopp, Krinner, Mix, Notz, Nowicki, Nurhati, Ruiz, Sallée, Slangen and Yu2021). New themes are developing in the field of Political Sciences, such as the study of the science/society interface, in particular the study of the contribution of climate services for a better decision-making (Hewitt et al., Reference Hewitt, Stone and Tait2017; Kopp et al., Reference Kopp, Gilmore, Little, Lorenzo‐Trueba, Ramenzoni and Sweet2019; Bisaro et al., Reference Bisaro, Hinkel, Le Cozannet, van der Pol and Haas2021; Lawrence et al., Reference Lawrence, Stephens, Blackett, Bell and Priestley2021; Simm et al., Reference Simm, Gouldby, Lumbroso and Matthewson2021), and other themes are still emerging, such as the question gender equity (Vasseur et al., Reference Vasseur, Thornbush and Plante2015; McLeod et al., Reference Mcleod, Arora-Jonsson, Masuda, Bruton-Adams, Emaurois, Gorong, Hudlow, James, Kuhlken, Masike-Liri, Musrasrik-Carl, Otzelberger, Relang, Reyuw, Sigrah, Stinnett, Tellei and Whitford2018; Malik et al., Reference Malik, Abdillah and Khaerah2021; Prakash et al., Reference Prakash, McGlade, Roxy, Roy, Some and Rao2022), or the inclusion of disabled people (Barua and Molla, Reference Barua and Molla2019; Molla et al., Reference Molla, Shahjahan, Barua and Samia2019) or religious and ethnic minorities (Ahmed and Ampadu, Reference Ahmed, Ampadu and Rivera2019; Sen et al., Reference Sen, Bond, Winkels, Linh and Dung2020) within public adaptation policies.

Table 1. Fields of social sciences for which numerous studies on coastal adaptation to sea-level rise can be identified (more than 70 studies)

These themes are also addressed by studies falling within the fields of Geography (Chakraborty et al., Reference Chakraborty, Collins, Montgomery and Grineski2014; Bunce and Ford, Reference Bunce and Ford2015; Smith and Rhiney, Reference Smith and Rhiney2016) and Sociology (Islam, Reference Islam2010; Pearse, Reference Pearse2017). These disciplines also study representations of the climate change and of adaptation; more specifically, Geography seeks to spatialize these representations, distinguishes the differences in representations between populations and places, and sheds lights on the factors shaping these perceptions (O’Neill et al., Reference O’Neill, Brennan, Brereton and Shahumyan2015; Brennan et al., Reference Brennan, O’Neill, Brereton, Dreoni and Shahumyan2016; Coquet et al., Reference Coquet, Mercier and Fleury-Bahi2018; Goeldner-Gianella et al., Reference Goeldner-Gianella, Grancher, Magnan, de Belizal and Duvat2019; Becerra et al., Reference Becerra, Pimentel, De Souza and Ibrahin Tovar2020; Lemée et al., Reference Lemée, Navarro, Restrepo-Ochoa, Mercier and Fleury-Bahi2020; Ruz et al., Reference Ruz, Rufin-Soler, Héquette, Révillon, Hellequin, Deboudt, Herbert, Cohen, Lebreton, Goff, Schmitt and Marin2020). This can facilitate the implementation of adaptation plans by considering the different needs and representations of local populations. Risk and vulnerability assessment, which has been addressed by geography for several decades, has also become central to the study of coastal adaptation (Kelly and Adger, Reference Kelly and Adger2000; Balica et al., Reference Balica, Wright and van der Meulen2012; Boateng, Reference Boateng2012; Duvat et al., Reference Duvat, Magnan, Wise, Hay, Fazey, Hinkel, Stojanovic, Yamano and Ballu2017; Thomas et al., Reference Thomas, Hardy, Lazrus, Mendez, Orlove, Rivera-Collazo, Roberts, Rockman, Warner and Winthrop2019; Duvat et al., Reference Duvat, Volto, Stahl, Moatty, Defossez, Desarthe, Grancher and Pillet2021), and has become increasingly important in the IPCC reports: inequalities in vulnerability may indeed hinder adaptation. Geographers are also addressing other issues, such as spatial planning for adaptation (Frazier et al., Reference Frazier, Wood and Yarnal2010; Hurlimann et al., Reference Hurlimann, Barnett, Fincher, Osbaldiston, Mortreux and Graham2014; Robert and Schleyer-Lindenmann, Reference Robert and Schleyer-Lindenmann2021; Wedin and Wikman–Svahn, Reference Wedin and Wikman–Svahn2021) or the question of climate-driven migrations. The literature distinguishes internal relocation within the same space, and international migration, which pushes populations to leave their island or their coastal areas to move elsewhere (Alexander et al., Reference Alexander, Ryan and Measham2012; King et al., Reference King, Bird, Haynes, Boon, Cottrell, Millar, Okada, Box, Keogh and Thomas2014; Bronen, Reference Bronen2015; Hino et al., Reference Hino, Field and Mach2017; Luetz and Merson, Reference Luetz, Merson, Leal Filho, Azul, Brandli, Özuyar and Wall2020; Horton et al., Reference Horton, Sherbinin, Wrathall and Oppenheimer2021; Duvat et al., Reference Duvat, Magnan, Goeldner-Gianella, Grancher, Costa, Maquaire, Le Cozannet, Stahl, Volto and Pignon-Mussaud2022; O’Donnell, Reference O’Donnell2022), creating the notion of ‘climate refugees’. In both cases, these climate-driven migrations are rarely chosen and not well accepted. Recently, studies have assessed the acceptability of these policies, as well as adaptation policies in general. Such studies can help to better understand the factors and profiles of the populations, to better implement adaptation policies (Goeldner-Gianella et al., Reference Goeldner-Gianella, Bertrand, Oiry and Grancher2015; Dachary-Bernard et al., Reference Dachary-Bernard, Rey-Valette and Rulleau2019; Anderson et al., Reference Anderson, Renaud, Hanscomb, Munro, Gonzalez-Ollauri, Thomson, Pouta, Soini, Loupis, Panga and Stefanopoulou2021; Anderson and Renaud, Reference Anderson and Renaud2021; Mallette et al., Reference Mallette, Smith, Elrick-Barr, Blythe and Plummer2021; Philippenko et al., Reference Philippenko, Goeldner-Gianella, Le Cozannet, Grancher and De La Torre2021).

Economic analyses of adaptation solutions, in particular cost–benefit analyses, are numerous (Basco, Reference Basco2015; André et al., Reference André, Boulet, Rey-Valette and Rulleau2016; Creach et al., Reference Creach, Bastidas-Arteaga, Pardo and Mercier2020; Vousdoukas et al., Reference Vousdoukas, Mentaschi, Hinkel, Ward, Mongelli, Ciscar and Feyen2020; Bachner et al., Reference Bachner, Lincke and Hinkel2022). Studies on adaptation finance are developing and would benefit from further research, including a detailed assessment of the current and potential role of actors, such as businesses, insurances, Non-Governmental Organisation (NGO) and citizens (Herweijer et al., Reference Herweijer, Ranger and Ward2009; Islam and Walkerden, Reference Islam and Walkerden2015; Bisaro and Hinkel, Reference Bisaro and Hinkel2018; Buso and Stenger, Reference Buso and Stenger2018; Costa et al., Reference Costa, Marchal, Moncoulon and Martìn2020). Studies on adaptation finance can also help establishing a clearer vision of the economic opportunities and constraints in different coastal settings. For example, they make it possible to develop coastal adaptation pathways that consider equity and justice from an economic perspective (Adelman, Reference Adelman2016; Siders, Reference Siders2019; Long et al., Reference Long, Bazart and Rey-Valette2022). From this perspective, studies on the conditions for financing adaptation, on the financial framework and the more detailed financing mechanisms are essential. The number of studies relevant to these issues is growing (Merrill et al., Reference Merrill, Kartez, Langbehn, Muller-Karger and Reynolds2018; Moser et al., Reference Moser, Ekstrom, Kim and Heitsch2019; Bisaro et al., Reference Bisaro, Bel, Hinkel, Kok and Bouwer2020; Woodruff et al., Reference Woodruff, Mullin and Roy2020). For example existing mechanisms for financing relocation (Henderson, Reference Henderson2018; Rey-Valette et al., Reference Rey-Valette, Lambert, Vianey, Rulleau, André and Lautrédou-Audouy2018; Boston et al., Reference Boston, Panda and Surminski2021; Keeler et al., Reference Keeler, Mullin, McNamara and Smith2022) or compensation following a natural disaster (Freeman, Reference Freeman2004; Paleari, Reference Paleari2019; Barraqué and Moatty, Reference Barraqué and Moatty2020) are receiving increased attention. Importantly, assessing the various aspects of the economic dimension of adaptation is increasingly recognised as essential, as it allows expensive adaptation actions such as relocation to be better anticipated (Turner et al., Reference Turner, Burgess, Hadley, Coombes and Jackson2007; André et al., Reference André, Boulet, Rey-Valette and Rulleau2016).

Social sciences delivering a more limited number of studies on coastal adaptation to sea-level rise

We explore in this section social sciences that are characterised by a more limited number of studies on coastal adaptation to sea-level rise. These disciplines exist since a long time, and may have contributed to research on coastal societies. However, their engagement into coastal adaptation research remains limited, based on our statistical analysis (Supplementary Material S2).

Legal Sciences can address numerous problems relevant to coastal adaptation, but the number of studies remains limited (Table 2). Areas of interest include the legal aspects of infrastructures relocation (Fowler et al., Reference Fowler, Korkut, Halvorsen, Holen, Howe and Chi2022), spatial planning and management in coastal areas (Thom, Reference Thom2004; Patlis, Reference Patlis2005) or compensation of populations facing natural disasters (Farber, Reference Farber2013). Legal studies can assess the legal provisions that exist in each country, or area of legislation to regulate the adaptation of coastal zones (Verschuuren and McDonald, Reference Verschuuren and McDonald2012; O’Donnell, Reference O’Donnell2019; Oral, Reference Oral2019; Schumacher, Reference Schumacher and Schumacher2020). They can also explore the legal gaps that still exist in existing regulations related to coastal adaptation (Reiblich et al., Reference Reiblich, Wedding and Hartge2017, Reference Reiblich, Hartge, Wedding, Killian and Verutes2019). The question of the interweaving of the different legislative scales – local, national and sub-national – is also a relevant research topic, as it sometimes leads to conflicts due to a misunderstanding of the different levels of legislation or to contradictions between them. One typical example is the misalignment between the local law of indigenous communities and that of the state in which these community live (Williams and Hardison, Reference Williams, Hardison, Maldonado, Colombi and Pandya2014; Davies, Reference Davies2015). This raises the question of equity and climate justice, through the prism of legal mechanisms (Adelman, Reference Adelman2016; Lambert et al., Reference Lambert, Arnaud and Claeys2019; Nurhidayah and McIlgorm, Reference Nurhidayah and McIlgorm2019).

Table 2. Fields of social sciences for which a more limited number of studies on coastal adaptation to sea-level rise can be identified (around 20 studies)

Research on current practices and relationships to the environment is often the purpose of Anthropology and Ethnography. The importance of these disciplines is increasingly being recognised in the literature on coastal adaptation to climate change. The latest IPCC report addresses it through the lens of indigenous communities (IPCC, Reference Pörtner, Roberts, Poloczanska, Mintenbeck, Tignor, Alegría, Craig, Langsdorf, Löschke, Möller and Okem2022). Specifically, this report emphasises the importance of considering indigenous knowledge, both in the assessment of climate change and in the implementation of adaptation measures (Hiwasaki et al., Reference Hiwasaki, Luna and Syamsidik2014; Granderson, Reference Granderson2017; Romero Manrique et al., Reference Romero Manrique, Corral and Guimarães Pereira2018; Mycoo et al., Reference Mycoo, Wairiu, Campbell, Duvat, Golbuu, Maharaj, Nalau, Nunn, Pinnegar, Warrick, Pörtner, Roberts, Tignor, Poloczanska, Mintenbeck, Alegría, Craig, Langsdorf, Löschke, Möller, Okem and Rama2022). However, there is currently a gap of knowledge in the IPCC reports and scientific literature on coastal adaptation: for example, in the chapter on cities and settlements by the sea (Glavovic et al., Reference Glavovic, Dawson, Chow, Garschagen, Haasnoot, Singh, Thomas, Pörtner, Roberts, Tignor, Poloczanska, Mintenbeck, Alegría, Craig, Langsdorf, Löschke, Möller, Okem and Rama2022), only 11 occurrences of the term ‘indigeneous’ and 5 references containing this term were found. Although a various literature exists in Anthropology on climate adaptation, the number of studies applied to coastal adaptation is scarcer (Supplementary Material S2). The role of values, faith and relationship to the environment of local communities is however becoming increasingly recognised and studied for successful adaptation (Nunn et al., Reference Nunn, Runman, Falanruw and Kumar2017; Bertana, Reference Bertana2020). Apart from the Indigenous Societies, the practices and the relationship to the environment of coastal societies, remain little studied, even though they could also bring some elements of understanding (Mazé et al., Reference Mazé, Dahou, Ragueneau, Danto, Mariat-Roy, Raimonet and Weisbein2017).

There are still relatively few studies on coastal adaptation in History and Archaeology. Yet these two branches of Social Sciences could help better understanding the evolving relationship between societies and their coastal environment over time, the changes in this relationship and the factors behind these changes (Pfister, Reference Pfister2010; Guedes et al., Reference Guedes, Crabtree, Bocinsky and Kohler2016; Rockman and Hritz, Reference Rockman and Hritz2020). This can benefit adaptation because current barriers may be historically rooted in a particular period such as colonialism (Ferdinand, Reference Ferdinand2018; Moulton and Machado, Reference Moulton and Machado2019; Bordner et al., Reference Bordner, Ferguson and Ortolano2020), in a specific relationship to the environment, or in social, economic or political lock-ins that have been established and maintained over time (Adamson et al., Reference Adamson, Hannaford and Rohland2018). Understanding vulnerability trajectories over time (Orlove, Reference Orlove2005; Arenstam Gibbons and Nicholls, Reference Arenstam Gibbons and Nicholls2006; Duvat et al., Reference Duvat, Magnan, Wise, Hay, Fazey, Hinkel, Stojanovic, Yamano and Ballu2017, Reference Duvat, Volto, Stahl, Moatty, Defossez, Desarthe, Grancher and Pillet2021) and the positive and negative legacy of prevalent practices inherited from the past (Janif et al., Reference Janif, Nunn, Geraghty, Aalbersberg, Thomas and Camailakeba2016; Athimon and Maanan, Reference Athimon and Maanan2018; Soens, Reference Soens2018) makes it possible to shed light on the links between past and present situations. Strengthening the contribution of these branches of social sciences to coastal adaptation could avoid overlooking barriers and opportunities that are crucial for local coastal communities.

Part of people’s relationship to the environment is also linked to the cognitive abilities of individuals. This aspect is studied by Psychology. Psychology makes it possible to uncover cognitive or psychological barriers to climate change and adaptation (Grothmann and Patt, Reference Grothmann and Patt2005; Lammel et al., Reference Lammel, Guillen Gutierrez, Dugas and Jamet2013; Clayton et al., Reference Clayton, Devine-Wright, Stern, Whitmarsh, Carrico, Steg, Swim and Bonnes2015), to better understand the role of individual and collective values on cognitive processes leading to action (Roser-Renouf et al., Reference Roser-Renouf, Maibach, Leiserowitz and Zhao2014), and to study how behaviours evolve as climate is changing and adaptation is being implemented (Bradley et al., Reference Bradley, Babutsidze, Chai and Reser2020; Brügger et al., Reference Brügger, Demski and Capstick2021). In coastal areas, psychological factors are especially relevant, for example, because the sea is often perceived by individuals as a source of positive amenities, which can create a cognitive barrier by reducing awareness of current and future coastal risks (Bruno et al., Reference Bruno, Motta Zanin, Barbanente and Damiani2021). A better understanding of these elements is therefore essential for the success of adaptation plans.

As a summary, there is empirical evidence that Legal sciences, Anthropology, Ethnography, History, Archaeology and Psychology can help understanding coastal adaptation and ultimately support it. Yet, the number of studies relevant to these areas is more limited than for the branches of social sciences reviewed in section ‘Social sciences delivering numerous studies on coastal adaptation to sea-level rise’. Nevertheless, the papers reviewed in this section suggest that further developing the emerging research reviewed in section ‘Social sciences delivering a more limited number of studies on coastal adaptation to sea-level rise’ can ultimately support coastal adaptation.

Social sciences delivering a very limited number of studies on coastal adaptation to sea-level rise

While scientific research on Media and climate Communication has existed for decades, it is developing and gaining in importance in recent years with the recognition that Medias contribute to shaping perceptions on climate change impacts, adaptation and mitigation (Table 3; Chen et al., Reference Chen, Rojas, Samset, Cobb, Niang, Edwards, Emori, Faria, Hawkins, Hope, Huybrechts, Meinshausen, Mustafa, Plattner, Tréguier, Masson-Delmotte, Zhai, Pirani, Connors, Péan, Berger, Caud, Chen, Goldfarb, Gomis, Huang, Leitzell, Lonnoy, Matthews, Maycock, Waterfield, Yelekçi, Yu and Zhou2021). This creates new research areas such as the use of social media and networks in relation with risks and disasters (Takahashi et al., Reference Takahashi, Tandoc and Carmichael2015; Kryvasheyeu et al., Reference Kryvasheyeu, Chen, Obradovich, Moro, Hentenryck, Fowler and Cebrian2016; Niles et al., Reference Niles, Emery, Reagan, Dodds and Danforth2019). Some studies focus on media coverage of climate change in coastal areas and adaptation solutions (Smith and Joffe, Reference Smith and Joffe2009; Rick et al., Reference Rick, Boykoff and Pielke2011; Schmidt et al., Reference Schmidt, Ivanova and Schäfer2013; Jaspal and Nerlich, Reference Jaspal and Nerlich2014; Painter, Reference Painter2015; Ford and King, Reference Ford and King2015; Akerlof et al., Reference Akerlof, Covi and Rohring2017), on the role that media play on people’s representations (Joffe and Orfali, Reference Joffe and Orfali2005; Olausson, Reference Olausson2011; Goeldner-Gianella et al., Reference Goeldner-Gianella, Grancher, Magnan, de Belizal and Duvat2019) and their influence on adaptation behaviour (Bowden et al., Reference Bowden, Nyberg and Wright2021). For example, it is now well established that Medias can help understanding climate change through narratives explaining the links between climate change and extreme phenomena, many of which affect coastal areas, such as storms, cyclones or chronic flooding at high tide.

Table 3. Fields of social sciences are characterised by a very limited number of studies on coastal adaptation to sea-level rise (less than 20 studies)

Educational Studies are complementary to media and communication sciences. Like media and communication, education plays a major role in understanding climate change and enabling adaptation (Cooper, Reference Cooper2011; Damerell et al., Reference Damerell, Howe and Milner-Gulland2013; Muttarak and Lutz, Reference Muttarak and Lutz2014; Borde et al., Reference Borde, Léna, Lescarmontier, Lackner, Sajjadi and Chen2020; Demant-Poort and Berger, Reference Demant-Poort and Berger2021; Kolenatý et al., Reference Kolenatý, Kroufek and Činčera2022). Importantly, a stronger integration of social sciences in environmental science school and academic curricula could be beneficial and avoid that solutions mostly focused solely on engineering and physical sciences (Shwom et al., Reference Shwom, Isenhour, Jordan, McCright and Robinson2017). A new field of research is also developing in this discipline is the study of the science-society interface and the resources that are developed in this framework, such as climate services, educational resources or serious games (Mouaheb et al., Reference Mouaheb, Fahli, Moussetad and Eljamali2012; Rumore et al., Reference Rumore, Schenk and Susskind2016; Flood et al., Reference Flood, Cradock-Henry, Blackett and Edwards2018; Fleming et al., Reference Fleming, Abad, Booth, Schueller, Baills, Scolobig, Petrovic, Zuccaro and Leone2020; Neset et al., Reference Neset, Andersson, Uhrqvist and Navarra2020).

To summarise, research on Media, Climate Communication and Education is a new research avenue that is developing as concerns are growing regarding climate change and its coastal impacts, and as Medias, teachers, science educators and academics are becoming increasingly aware of their role in shaping representations and providing knowledge on climate change. Importantly, this research supports the uptake of climate literacy in the wider public, which can improve the responses, as reminded in the latest IPCC reports (IPCC, Reference Masson-Delmotte, Zhai, Pirani, Connors, Péan, Berger, Caud, Chen, Goldfarb, Gomis, Huang, Leitzell, Lonnoy, Matthews, Maycock, Waterfield, Yelekçi, Yu and Zhou2021, Reference Pörtner, Roberts, Poloczanska, Mintenbeck, Tignor, Alegría, Craig, Langsdorf, Löschke, Möller and Okem2022). More interdisciplinary research assessing the interactions between Media, Climate Communication and Education and adaptation to climate change could be beneficial to accelerate adaptation, including in coastal areas.

Finally, we point out that each disciplinary field within social sciences can explore different dimensions of coastal adaptation in a complementary way. As seen throughout this study, some dimensions of coastal adaptation research have been even addressed by several disciplines. One example is the topic of relocation in coastal areas, which has been addressed by studies falling within areas such as by Economics (André et al., Reference André, Boulet, Rey-Valette and Rulleau2016; Dachary-Bernard et al., Reference Dachary-Bernard, Rey-Valette and Rulleau2019; Creach et al., Reference Creach, Bastidas-Arteaga, Pardo and Mercier2020; Keeler et al., Reference Keeler, Mullin, McNamara and Smith2022), Political Sciences (Gussmann and Hinkel, Reference Gussmann and Hinkel2020), Legal Science (Fowler et al., Reference Fowler, Korkut, Halvorsen, Holen, Howe and Chi2022), Anthropology (Janif et al., Reference Janif, Nunn, Geraghty, Aalbersberg, Thomas and Camailakeba2016; Bertana, Reference Bertana2020) or Geography (Alexander et al., Reference Alexander, Ryan and Measham2012; Duvat et al., Reference Duvat, Magnan, Goeldner-Gianella, Grancher, Costa, Maquaire, Le Cozannet, Stahl, Volto and Pignon-Mussaud2022).

Discussion

Key inputs from social sciences to coastal adaptation

Not surprisingly, section ‘Current and potential role of social science in enabling coastal adaptation’ and Tables 13 confirm that social sciences can cover a very high number of topics relevant to coastal adaptation research. It also reminds that social research not only improves our understanding of behaviours, prevalent practices, social norms and representations of individuals and social groups, but can also support coastal adaptation in practice (see fourth column in Tables 13). For example, a social science project on coastal adaptation can support practitioners responsible for defining or implementing coastal adaptation policies that consider the needs and priorities of coastal communities, and not only technical or economic criteria. The potential benefits for coastal adaptation practitioners are to move towards greater efficiency and to promote stable and long-term adaptation policies that are just and impactful. Social sciences can also promote the engagement of citizens in participatory democracy, which improves the trust of individuals in the adaptation process and facilitates the implementation of adaptation policies (Table 1; Hügel and Davies, Reference Hügel and Davies2020). Social sciences also approach adaptation across the world, and therefore underline the diversity of socio-economic, ecological and political-institutional contexts, recalling that no unique coastal adaptation solution or pathway could be replicated or adapted across coastal regions and localities. Hence, our review confirms that social science on coastal adaptation can bring important benefits on the ground.

Strengthening social science inputs to coastal adaptation

Yet, some disciplines within social sciences remain insufficiently considered in coastal adaptation despite clear evidence that they can bring social benefits. For example, Anthropology and Psychology could be much more developed and integrated into existing research programmes (section ‘Social sciences delivering a more limited number of studies on coastal adaptation to sea-level rise’), including in new programmes focusing mainly on physical sciences and service development. Interdisciplinary research has been conducted, for example, on coastal adaptation geography and economy (Creach et al., Reference Creach, Bastidas-Arteaga, Pardo and Mercier2020; Long et al., Reference Long, Bazart and Rey-Valette2022) or political science and economy (van Ginkel et al., Reference van Ginkel, Botzen, Haasnoot, Bachner, Steininger, Hinkel, Watkiss, Boere, Jeuken, de Murieta and Bosello2020; Woodruff et al., Reference Woodruff, Mullin and Roy2020), yet the majority of studies involve only one discipline, or two at best (Supplementary Material S3). Even more, interdisciplinarity could be promoted and ultimately benefit the practice of coastal adaptation. Finally, it is not clear to what extent the literature on social sciences applied to coastal adaptation is considered by public policies and decision-makers, beyond those already engaged with social scientists. On the contrary, the IPCC report suggests that top-down engineering solutions still dominate, at least in regions such as Europe, despite their potential to damage coastal ecosystems, create lock-ins or perpetuate a commitment to maintain coastal defences on the long term (IPCC, Reference Pörtner, Roberts, Poloczanska, Mintenbeck, Tignor, Alegría, Craig, Langsdorf, Löschke, Möller and Okem2022).

This limited consideration of social sciences in the practice of coastal adaptation might be due to the prevalent work practices of many coastal adaptation decision-makers, which often have a coastal engineering background and do not necessarily all know the benefit of a social approach. The strong focus of large research programmes on climate services development, at least in Europe, is efficient to inform coastal adaptation decisions quickly and efficiently (Le Cozannet et al., Reference Le Cozannet, Nicholls, Hinkel, Sweet, McInnes, Van de Wal, Slangen, Lowe and White2017), but this entry point does not ease the integration of social sciences beyond those directly concerned with existing risk management decisions. Furthermore, existing management decisions are most often incremental, while IPCC reports raise the need for transformational adaptation to respond to climate change (Bednar-Friedl et al., Reference Bednar-Friedl, Biesbroek, Schmidt, Alexander, Børsheim, Carnicer, Georgopoulou, Haasnoot, Le Cozannet, Lionello, Lipka, Möllmann, Muccione, Mustonen, Piepenburg, Whitmarsh, Pörtner, Roberts, Tignor, Poloczanska, Mintenbeck, Alegría, Craig, Langsdorf, Löschke, Möller, Okem and Rama2022). Hence, there is a risk to miss the transformative dimension of adaptation. One potential interdisciplinary research avenue to resolve this issue could be to develop decision-making tools and methods that integrate socio-economic transformations in a climate service informing transparently about the social feasibility and co-benefits of each coastal adaptation solution.

The development of social science applied to coastal adaptation should consider the spatial imbalance that currently exists in the scientific literature. Many studies are focused on Europe, North America, Southeast Asia or Small Islands as a specific geographic entity facing its own challenges due to climate change, although studies have expanded to other geographical areas in recent years (Anderson and Renaud, Reference Anderson and Renaud2021; Mallette et al., Reference Mallette, Smith, Elrick-Barr, Blythe and Plummer2021; Cabana et al., Reference Cabana, Rölfer, Evadzi and Celliers2023). Social research applied to coastal adaptation outside the Western world is still underdeveloped despite their highly diversified history, cultures and values. Developing social research in different coastal environments and in different types of coastal management units (sandy, muddy, cliffed or artificial coasts and estuaries) can help reveal contrasted coastal adaptation and development opportunities. For example, sea-level rise questions about the current land use and can ultimately lead to territorial reconfigurations in coastal areas that are already developed. Yet in developing coasts and countries such as in Africa and Asia, there is the opportunity to consider sea level rise in the design of cities and in land-use planning now in order to avoid lock-ins in the future. Indeed, the IPPC Sixth Synthesis Report (Lee et al., Reference Lee, Paavola and Dessai2022) shows that until 2040, exposure to coastal flooding will not only increase due to sea-level rise, but also due to development in coastal areas. For example, they estimate that an additional 1.25 million people in Africa and 7 million in Asia will be exposed to coastal flooding due to sea-level rise only. If we add the additional population caused by population growth and coastal development, the number of additional people exposed to flooding increases to 2.29 million in Africa and 16.39 million in Asia. This assumes a ‘middle of the road’ Socio-Economic Pathway (SSP2). Yet, population growth in the coming two decades are largely locked in already and display limited differences depending on Socio-Economic Pathways at these broad scales (Merkens et al., Reference Merkens, Reimann, Hinkel and Vafeidis2016). This raises serious concerns regarding projected trends in coastal land use in the context of ongoing sea-level rise, at least in Africa and Asia. This illustrates that coastal adaptation planning can benefit from taking into account socio-economic projections such as those derived from the Socio-Economic Pathways.

Enabling coastal resilient development

Climate change and sea-level rise projections clearly show that current coastal development needs transformations to limit future coastal risks, restore coastal ecosystems, stimulate economic activities and ensure wellbeing (IPCC, Reference Pörtner, Roberts, Poloczanska, Mintenbeck, Tignor, Alegría, Craig, Langsdorf, Löschke, Möller and Okem2022). These transformations go far beyond the sole topic of coastal adaptation and can be referred to as coastal resilient development (Figure 3). In the IPCC report, it corresponds to a situation where sustainable development goals have been achieved, including mitigation of and adaptation to climate change (IPCC, Reference Pörtner, Roberts, Poloczanska, Mintenbeck, Tignor, Alegría, Craig, Langsdorf, Löschke, Möller and Okem2022). Enabling such a resilient coastal development implies agreeing on a long-term vision that considers the decades and centuries of sea-level rise to come, for example when designing new coastal infrastructures such as coastal nuclear plants or estuarine barriers. It also requires agreeing on what it means to achieve sustainable development goals in each coastal zones in terms of economic activities, land use and coastal protection. Defining and agreeing on such a long-term vision is essential: coasts will be facing systemic transformation, including coastal ecosystems changes, energy transition implications, transformations in sectors such as fisheries, urban planning, port and coastal industries, and so forth.

Figure 3. Illustrative transition from a coastal adaptation focused mainly on limiting future coastal risks to a coastal resilient development considering other economic, social and ecosystemic transformations in coastal areas. Social sciences can help in expanding the scope of coastal transformations considered at different decision levels.

Such long-term visions are rarely explicitly stated. In many places, there is a high social demand for protection, so that the default approach often consists in raising coastal protection (Mallette et al., Reference Mallette, Smith, Elrick-Barr, Blythe and Plummer2021). This type of approach comes along with trade-offs, for example in terms of costs, biodiversity conservation and tourism amenities. Softer coastal management approaches that leaves more space to coastal ecosystems are slowly emerging in Europe though their benefits are known since decades (e.g., www.eurosion.org). For example in France, the Conservation Agency is experimenting the renaturation of coastal sites and a retreat of coastal defences inland in close collaboration with other coastal communities (Bazin and Olivry, Reference Bazin and Olivry2017). Locally, a long-term vision may include a long-term commitment to coastal protection in some places and a progressive relocation and renaturation project in other areas. Whatever the objectives, we argue that a clear and transparent process for defining long-term objectives is essential to create trust in the process of coastal adaptation and to enable coastal resilient development. Once the long-term vision is defined, pathways to achieve them can be debated (Haasnoot et al., Reference Haasnoot, Kwakkel, Walker and Ter Maat2013).

Social sciences will not deliver this vision, but they can help coastal stakeholders to formalise them, propose opportunities and potential ways forwards revealed by various disciplines of social sciences. For territories that are considering alternatives to engineering protection, social sciences can be crucial: they can help raise awareness, they can study and develop the acceptability of adaptation alternatives, they can facilitate dialogue between stakeholders or propose a historical perspective to the occupation and evolution of the territory. In summary, we argue that social sciences are an essential part of science to enable coastal adaptation and resilient coastal development. The local benefits of this research are obvious for coastal communities as it can help shaping and fostering climate-resilient development locally.

Conclusion and perspectives

This scoping review highlights how social sciences could help enabling coastal adaptation by providing a clearer picture of adaptation barriers and opportunities across scales, from local to global. This includes analyses of populations and stakeholders priorities, needs, perceptions and adaptation capacity, considering also ethical aspects such as equity and inclusiveness. We identify branches of social sciences already contributing significantly to coastal adaptation, such as Political Sciences, Economics, Sociology and Geography, and other that are developing but still lagging behind such as Legal Sciences, Psychology, History and Archaeology as well as Anthropology and Ethnography. New research could better integrate Educational, Media and Communication Sciences, and aim at better integrating the various branches of social sciences with coastal engineering, geomorphology, environmental and ecological sciences. We show that this research can support adaptation (Tables 13) and may help moving away from a practice of coastal adaptation often focused on engineering protection.

Due to the wide variety of biophysical and social contexts, there is no unique coastal adaptation solution or pathway that could be replicated or adapted across coastal regions and localities. Hence, we argue that a global social research effort, well connected to coastal stakeholders, exposed populations, climate services providers, and other relevant scientific areas could support coastal adaptation efficiently.

Our scoping review is a first effort to explore how different fields of social sciences are and may support coastal adaptation to sea-level rise that may be completed and expanded by a systematic review and additional research. We showed that current and future social science research can facilitate the implementation of adaptation and can contribute to shaping a socially desirable and feasible adaptation future in coastal areas. Beyond social sciences, other contributions could be considered, including artistic activities or literature fiction, which although not a social science can greatly help to raise awareness and disseminate science.

Based on this review, we suggest ways forward to amplify this effort and call for a strong development of coastal social science research. Specifically, we recommend to:

  • expand the relatively limited scope of social research supporting coastal adaptation: this includes considering a wider variety of geographical contexts, coastal ecosystems and coastal management units;

  • aim at better integrating emerging research areas identified above, while developing interdisciplinary studies linking social sciences with coastal science, climate services and the practice of coastal adaptation, which often remain focused on delivering climate and coastal hazard or risk geospatial datasets today.

Ultimately, these efforts could enable coastal communities, researchers and stakeholders to engage into broader transformations embracing issues such as social and economic development, mitigation of climate change as well as coastal ecosystem decline.

Open peer review

To view the open peer review materials for this article, please visit http://doi.org/10.1017/cft.2023.25.

Supplementary material

The supplementary material for this article can be found at https://doi.org/10.1017/cft.2023.25.

Data availability statement

The database on which this review relies is available in Supplementary Material S4.

Acknowledgements

We thank Lydie Goeldner-Gianella for discussions and advices on coastal adaptation and Jean Crnokrak for his help with data processing.

Author contribution

X.P. and G.L.C. designed and performed the research and wrote the paper.

Financial support

X.P. and G.L.C. are both supported by PROTECT, and G.L.C. is also by CoCliCo. These projects have received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement nos. 869304 and 101003598; PROTECT contribution number TBD.

Competing interest

The authors declare none.

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Figure 0

Figure 1. Idealised adaptation pathway leading to coastal resilient development, based on typical settings in Europe. During the 20th century, engineering protection has been the mainstream coastal risk prevention measure. This measure is becoming increasingly costly and may face adaptation limits when sea-level rise exceeds some site-specific thresholds or rates. New measures such as ecosystem-based protection or accommodation (actions to reduce vulnerability, for example, raising houses, developing early warning systems…) are being increasingly experimented locally. The feasibility of relocation is often limited today due to social and economic interest. Yet relocation may become mainstream and may be part of coastal resilient development in the future above site-specific sea levels. Figure inspired by Bednar-Friedl et al. (2022) and IPCC (2022).

Figure 1

Figure 2. Social sciences in the context of coastal adaptation. The figure shows how social sciences are positioned in the context of coastal adaptation implementation. It highlights the unequal number of studies available in the peer-reviewed literature depending on each branch of social sciences.

Figure 2

Table 1. Fields of social sciences for which numerous studies on coastal adaptation to sea-level rise can be identified (more than 70 studies)

Figure 3

Table 2. Fields of social sciences for which a more limited number of studies on coastal adaptation to sea-level rise can be identified (around 20 studies)

Figure 4

Table 3. Fields of social sciences are characterised by a very limited number of studies on coastal adaptation to sea-level rise (less than 20 studies)

Figure 5

Figure 3. Illustrative transition from a coastal adaptation focused mainly on limiting future coastal risks to a coastal resilient development considering other economic, social and ecosystemic transformations in coastal areas. Social sciences can help in expanding the scope of coastal transformations considered at different decision levels.

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Author comment: Social science to accelerate coastal adaptation to sea-level rise — R0/PR1

Comments

Dear Dr. Spencer,

Thank you very much for your invitation for a commissioned review for the journal Coastal Futures.

Xenia Philippenko and myself are pleased to submit a manuscript entitled “Social science to accelerate coastal adaptation”. In this paper, we review how social sciences have contributed to coastal adaptation so far. We identify branches of social sciences that could provide a greater contribution in the future such as Legal Sciences and studies focused on Medias, Communication and Education. We argue that more interdisciplinary studies in social sciences applied to coastal adaptation can help the practice of coastal adaptation and could support moving from coastal adaptation practices often focused on coastal engineering solutions to broader transformations enabling coastal resilient development.

We hope that this proposal will be suitable for the journal and I remain available for any question on this proposal.

Many thanks again for your invitation.

Best regards

Xénia Philippenko and Gonéri Le Cozannet

Review: Social science to accelerate coastal adaptation to sea-level rise — R0/PR2

Conflict of interest statement

I do not have competing interests with the authors.

Comments

Social science to accelerate coastal adaptation

Comments to Authors

This article addresses a very important topic: the adaptation of coastal regions to climate and environmental changes. It proposes to review the role of the different branches of social sciences that can enable sustainable coastal development. It presents several significant outcomes. Nevertheless, no scientific information is available regarding the review methodology.

Propositions

1/. Include social sciences as keywords.

2/. Summary: it is not clear what the article is about, and what is its methodology for getting the results presented in the abstract. What sort of review did the authors write? For instance, “We show that some bunches….” What does it mean we show, it is not precise!!!

3/. Impact statement: very general, requires a certain amount of precision.

4/. Page 2: Keywords are not the same as on the cover page, why?

5/. The term “accommodation” would need to be defined for Figure 1, Figure 2; page 3, line 75.

6/. Page 4, line 87 “We often assume that adaptation will be implemented in an optimal way.” Who are we? For optimism, maybe some references to psychology might be helpful. (e.g. Lammel, A., Dugas, E., & Guillen Gutierrez, E. (2012). L’apport de la psychologie cognitive à l’étude de l’adaptation aux changements climatiques: la notion de vulnérabilité cognitive. Vertigo, 12(1) ; Gardezi, M., & Arbuckle, J. G. (2020). Techno-optimism and farmers’ attitudes toward climate change adaptation. Environment and Behavior, 52(1), 82-105.)

7/. Page 4, line 79 (Figure 1; Bednar-Friedl et al., 2022) the reference in Figure 1 is different from the reference on page 3.

8/. Page 4, lines 89-102: This section is quite general and contains a few “errors”. It should be delayed or provide more accurate information, for example on the role of philosophy in the genesis of the social sciences. A distinction would have to be drawn between the humanities and the social sciences.

9/. Page 4, lines 104-105 “This review is based on a search, selection, and assessment of the existing literature using Web of Sciences (Table 1).” Methodological aspects of research, selection, and assessment have to be presented. Who encoded the papers? According to what criteria? Why solely WEB of Sciences? There are very different types of reviews, and there is a need to give specific information on the research protocol. (Various reviews: scoping review, systematic review, academic literature evidence map, systematic global inventory, etc.). For a method protocol of a systematic review, see for example Andreucci, M.B., de Vries, S., Marselle, M. R., Olszewska-Guizzo, A., Keune, H., O’Brien, L.,... and Lammel, A. (2019). Types and characteristics of urban green & blue spaces having an impact on human mental health and wellbeing: Methods Protocol, Knowledge assessment and synthesis. EKLIPSE.

10/. Page 7, lines 143 to 145, what are the criteria that apply to those classifications? How many scientific articles? The types of articles? The methodology?

11/. Figure 2 is unclear and does not present the relationship between the different adaptation options and the social sciences involved in these adaptive responses. This figure must be revised.

12/. Page 9, 205-206 “The number of studies relevant to these issues, while still limited, is growing (Merrill et al., 2018; Moser et al., 2019; Woodruff et al., 2020; Bisaro et al., 2020).” This phrase is somewhat ambiguous, what does it mean limited, but growing? I think this kind of quantitative commentary doesn’t make sense if the authors don’t give specific criteria.

13/. Page 10, lines 214-227 Legal science references are not really new, they do not appear to be an emerging research area.

14/. Page 12, line 294... I suggest adding: and provides knowledge as well!!

15/. Page 13, lines 307-309 As you gave only one example I propose to put this sentence in the conclusion part. “Here again, there is a need for more interdisciplinary research bringing together the different branches of social sciences supporting coastal adaptation.”

16/. Page 14, line 371 what is “long-term vision”, how many years, decades, centuries? How to integrate the different scenarios with a “long-term vision”?

17/. Figure 3 the Coastal adaptation circle and the coastal resilient development circle should be bidirectional.

18/. Page 16, 379-390 avoid some repetitions; 388-390 “Combined with artistic contributions, which although not a social science can greatly help to raise awareness and disseminate science, social sciences can now be considered as an essential part of science to enable coastal adaptation and resilient coastal development.” The role of art, even if I think is very important, it does not fit with the reviewed social sciences, maybe it should be integrated into “perspectives”.

19/. Pages 16, 17 maybe you should add a “perspective” section.

20/. Pages 35-38 Table 1: review of social science studies applied to coastal adaptation: If you have enough space, you could integrate more references (exhaustive) references in order to strengthen the review.

Table 1: Potential for enabling adaptation or resilient coastal development or potential for accelerate coastal adaptation (as in the title)?

Review: Social science to accelerate coastal adaptation to sea-level rise — R0/PR3

Conflict of interest statement

n/a

Comments

This artile seeks to outline the contributions of the social sciences to the study of coastal climate adaptation. The authors provide an overview of the social sciences as it relates to a broad field of discplines and find that the discpline of economics and political science have made most of the contributions to date. The paper, however, conflates literature that is in the applied social sciences with the interperative and theory-driven social sciences scholarship. Consequently, the authors fail to review a wide array of literature, particularly in anthropology and area studies, that has made contributions to the topic of coastal climate adaptation. Also, the authors tend to attribute such broad themes as “colonialism” and “inequality” to being resolutely “social science” topics, while also citing literature on these themes that have very little to do with coastal climate adaptation. I’d encourage the authors to more clearly engage distinctions between applied and interperative/theory-driven scholarship in the social sciences on coastal climate adaptation. In addition, I would suggest that the authors add a “coda” section that offers an analysis as to why/how the existing governance frameworks of the IPCC perpetuate an overemphasis on applied scholarship; and on the other hand, blindly encourage the narrowing of social science literature around themes, such as ‘justice’ and ‘equity,’ in the the study of coastal climate adpatation.

Recommendation: Social science to accelerate coastal adaptation to sea-level rise — R0/PR4

Comments

No accompanying comment.

Decision: Social science to accelerate coastal adaptation to sea-level rise — R0/PR5

Comments

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Author comment: Social science to accelerate coastal adaptation to sea-level rise — R1/PR6

Comments

Dear Editors,

Thank you for inviting us to publish our manuscript in Coastal’s Futures.

Please find enclose a revised paper and detailed responses to the comments of the reviewers.

All the comments were implemented and/or responded. We hope that these clarifications are appropriately responding to the reviewers’ concerns.

We stay at your disposal for any further information.

With best regards,

On behalf of the co-author,

Xénia Philippenko

Review: Social science to accelerate coastal adaptation to sea-level rise — R1/PR7

Conflict of interest statement

There are no competing interests between me and the authors.

Comments

Dear Author,

The article is now ready to be published. The article’s quality was improved by the modifications. The importance of social sciences in coastal adaptation to sea-level rise is fully demonstrated by it.

Recommendation: Social science to accelerate coastal adaptation to sea-level rise — R1/PR8

Comments

No accompanying comment.

Decision: Social science to accelerate coastal adaptation to sea-level rise — R1/PR9

Comments

No accompanying comment.