from Part II - The palaeoenvironmental record
Published online by Cambridge University Press: 26 April 2011
ABSTRACT
When used in conjunction, climate models and palaeoenvironmental data can lead to a more complete understanding of past climate than is possible using either method in isolation. Moreover, the veracity of climate models can be evaluated, which then lends credence to their use for predicting future climate change. In this study we investigate the transition to aridity in the eastern Mediterranean that occurred in the Holocene, a transition with marked consequences for settlement of the Middle East. We show that the general pattern of a transition during the Holocene to a wetter northern Europe and a drier Middle East is seen in both the palaeoenvironmental record and climate model simulations. The pattern of precipitation changes projected by the climate model for the past is similar to those projected for the end of the twenty-first century under GHG-driven climate change. The climate model's ability to represent the past – as tested against palaeoenvironmental observations – thus lends credence to the future projections.
INTRODUCTION
The Holocene climate of the Middle East can be investigated using climate proxies and geological evidence (Chapters 6 and 7, this volume) or through climate modelling (Chapter 3). In this chapter, we show how combining these two approaches has the potential to deepen our understanding of the past climate. We also describe how comparison between the climate model output, proxy data and historical observations provides a means of evaluating the climate models and assessing the credibility of future projections.
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