Book contents
- Frontmatter
- Contents
- List of Contributors
- Foreword
- 1 Testing hypotheses about biological invasions and Charles Darwin’s two-creators rumination
- Part I Ancient invaders
- 2 Australia’s Acacia: unrecognised convergent evolution
- 3 The mixed success of Mimosoideae clades invading into Australia
- 4 Perspectives from parrots on biological invasions
- 5 Invasion ecology of honeyeaters
- 6 The invasion of terrestrial fauna into marine habitat: birds in mangroves
- 7 The biological invasion of Sirenia into Australasia
- 8 Flying foxes and drifting continents
- 9 Invasion ecology of Australasian marsupials
- 10 Murine rodents: late but highly successful invaders
- 11 Drift of a continent: broken connections
- 12 The development of a climate: an arid continent with wet fringes
- Part II Modern invaders
- Index
- References
12 - The development of a climate: an arid continent with wet fringes
from Part I - Ancient invaders
Published online by Cambridge University Press: 05 February 2014
- Frontmatter
- Contents
- List of Contributors
- Foreword
- 1 Testing hypotheses about biological invasions and Charles Darwin’s two-creators rumination
- Part I Ancient invaders
- 2 Australia’s Acacia: unrecognised convergent evolution
- 3 The mixed success of Mimosoideae clades invading into Australia
- 4 Perspectives from parrots on biological invasions
- 5 Invasion ecology of honeyeaters
- 6 The invasion of terrestrial fauna into marine habitat: birds in mangroves
- 7 The biological invasion of Sirenia into Australasia
- 8 Flying foxes and drifting continents
- 9 Invasion ecology of Australasian marsupials
- 10 Murine rodents: late but highly successful invaders
- 11 Drift of a continent: broken connections
- 12 The development of a climate: an arid continent with wet fringes
- Part II Modern invaders
- Index
- References
Summary
Introduction
The Australian continent is large and therefore exhibits a range of very different climatic zones. Broadly, the continent is characterised by arid climatic regimes: four-fifths of the landmass receiving an annual rainfall of less than 600 mm (Figure 12.1) and one-half of the continent receiving less than 300 mm. These arid and semi-arid regions form the greatest proportion of inland Australia, and are fringed by narrow, wet and temperate climatic zones along the southwestern, southern and eastern coastal zones (Figure 12.1). Tropical monsoonal rainfall characterises the northern coastal zones. Compared to other continents on Earth, Australia has by far the lowest average rainfall. This low precipitation rate is coupled with a high evaporation rate meaning that surface water availability is also anomalously low compared to global averages. Average annual temperature also shows significant variation (Figure 12.1) and in most areas there is also a high diurnal variation in temperature.
It is well known, however, that the currently arid areas of inland Australia were significantly wetter in the geological past, from the early Cenozoic (a period of geological time from c. 65 Ma until the present day; Gradstein et al. 2004) until at least the early Miocene (c. 23 Ma) (e.g. Kershaw et al. 1994; Martin 2006). Much of our current knowledge of climate change from the early Cenozoic to the present is deduced from observed variations in the isotopic signature of marine sediments (e.g. deMenocal 1995; Lisiecki and Raymo 2005; Raymo et al. 2006) as well as the distribution, chemistry and palynological assemblages of terrestrial and marine sediments and sedimentary rocks.
- Type
- Chapter
- Information
- Invasion Biology and Ecological TheoryInsights from a Continent in Transformation, pp. 256 - 282Publisher: Cambridge University PressPrint publication year: 2014
References
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