Arid
DOI10.1002/2015WR017031
On the assessment of aridity with changes in atmospheric CO2
Roderick, Michael L.1,2,3; Greve, Peter4; Farquhar, Graham D.2,3
通讯作者Roderick, Michael L.
来源期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2015
卷号51期号:7页码:5450-5463
英文摘要

A recent interpretation of climate model projections concluded that warmer is more arid. In contrast, dust records and other evidence have led the geoscience community to conclude that warmer is less arid leading to an aridity paradox. The warmer is more arid interpretation is based on a projected increase in the vapour pressure deficit (approximate to 7-9% K-1) that results in a projected increase in potential evaporation that greatly exceeds the projected increase in precipitation. However, the increase in potential evaporation does not result in an increase in (actual) evaporation which remains more or less constant in the model output. Projected changes in the long-term aridity can be assessed by directly interrogating the climate model output. To that end, we equate lack of precipitation with meteorological aridity and lack of runoff with hydrologic aridity. A third perspective, agro-ecological aridity, is not directly related to the water lost but rather to the carbon gain and is equated with the reduction in photosynthetic uptake of CO2. We reexamine the same climate model output and conclude that warmer is less arid from all perspectives and in agreement with the geological records. Future research will need to add the critical regional and seasonal perspectives to the aridity assessments described here.


英文关键词aridity climate change ecohydrology potential evaporation
类型Article
语种英语
国家Australia ; Switzerland
收录类别SCI-E
WOS记录号WOS:000360080200031
WOS关键词LAST GLACIAL MAXIMUM ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; POTENTIAL EVAPOTRANSPIRATION ; AUSTRALIAN VEGETATION ; PLANT-RESPONSES ; PAN EVAPORATION ; WATER CYCLE ; SOIL-WATER ; PHOTOSYNTHESIS
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/190790
作者单位1.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia;
2.Australian Natl Univ, Res Sch Biol, Canberra, ACT, Australia;
3.Australian Res Council Ctr Excellence Climate Sys, Canberra, ACT, Australia;
4.ETH, Inst Atmospher & Climate Sci, Zurich, Switzerland
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GB/T 7714
Roderick, Michael L.,Greve, Peter,Farquhar, Graham D.. On the assessment of aridity with changes in atmospheric CO2[J],2015,51(7):5450-5463.
APA Roderick, Michael L.,Greve, Peter,&Farquhar, Graham D..(2015).On the assessment of aridity with changes in atmospheric CO2.WATER RESOURCES RESEARCH,51(7),5450-5463.
MLA Roderick, Michael L.,et al."On the assessment of aridity with changes in atmospheric CO2".WATER RESOURCES RESEARCH 51.7(2015):5450-5463.
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