GSTDTAP  > 气候变化
DOI10.1175/JCLI-D-17-0757.1
Soil Moisture-Evapotranspiration Coupling in CMIP5 Models: Relationship with Simulated Climate and Projections
Berg, Alexis1; Sheffield, Justin2
2018-06-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2018
卷号31期号:12页码:4865-4878
文章类型Article
语种英语
国家USA; England
英文摘要

Soilmoisture-atmosphere coupling is a key process underlying climate variability and change over land. The control of soil moisture (SM) on evapotranspiration (ET) is a necessary condition for soil moisture to feed back onto surface climate. Here we investigate how this control manifests itself across simulations from the CMIP5 ensemble, using correlation analysis focusing on the interannual (summertime) time scale. Analysis of CMIP5 historical simulations indicates significantmodel diversity in SM-ET coupling in terms of patterns and magnitude. We investigate the relationship of this spread with differences in background simulated climate. Mean precipitation is found to be an important driver of model spread in SM-ET coupling but does not explain all of the differences, presumably because of model differences in the treatment of land hydrology. Compared to observations, some land regions appear consistently biased dry and thus likely overly soil moisture-limited. Because of ET feedbacks on air temperature, differences in SM-ET coupling induce model uncertainties across the CMIP5 ensemble in mean surface temperature and variability. We explore the relationships between model uncertainties in SM-ET coupling and climate projections. In particular over mid-to-high-latitude continental regions of the Northern Hemisphere but also in parts of the tropics, models that are more soilmoisture-limited in the present tend to warm more in future projections, because they project less increase in ET and (in midlatitudes) greater increase in incoming solar radiation. Soil moisture-atmosphere processes thus contribute to the relationship observed across models between summertime present-day simulated climate and future warming projections over land.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000450689300003
WOS关键词LAND-ATMOSPHERE FEEDBACKS ; UNITED-STATES ; SURFACE-TEMPERATURE ; PRECIPITATION ; STRENGTH ; AMPLIFICATION ; VARIABILITY ; CIRCULATION ; EXTREMES ; IMPACT
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/20864
专题气候变化
作者单位1.Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA;
2.Univ Southampton, Dept Geog, Southampton, Hants, England
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Berg, Alexis,Sheffield, Justin. Soil Moisture-Evapotranspiration Coupling in CMIP5 Models: Relationship with Simulated Climate and Projections[J]. JOURNAL OF CLIMATE,2018,31(12):4865-4878.
APA Berg, Alexis,&Sheffield, Justin.(2018).Soil Moisture-Evapotranspiration Coupling in CMIP5 Models: Relationship with Simulated Climate and Projections.JOURNAL OF CLIMATE,31(12),4865-4878.
MLA Berg, Alexis,et al."Soil Moisture-Evapotranspiration Coupling in CMIP5 Models: Relationship with Simulated Climate and Projections".JOURNAL OF CLIMATE 31.12(2018):4865-4878.
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