globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-15-0567.1
Scopus记录号: 2-s2.0-85014512057
论文题名:
Variability of soil moisture and sea surface temperatures similarly important for warm-season land climate in the community earth system model
作者: Orth R.; Seneviratne S.I.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期:6
起始页码: 2141
结束页码: 2162
语种: 英语
Scopus关键词: Atmospheric pressure ; Atmospheric temperature ; Atmospheric thermodynamics ; Climate change ; Climate models ; Earth (planet) ; Feedback ; Moisture ; Precipitation (meteorology) ; Soil moisture ; Soils ; Submarine geophysics ; Surface properties ; Surface waters ; Tropics ; Weather forecasting ; Atmosphere-land interactions ; Atmosphere-ocean interactions ; Comprehensive comparisons ; Extreme precipitation ; Land-atmosphere couplings ; Sea surface temperature (SST) ; Sea surface temperatures ; Summer/warm season ; Oceanography ; air temperature ; air-sea interaction ; air-soil interaction ; climate feedback ; climate modeling ; climate variation ; El Nino-Southern Oscillation ; precipitation (climatology) ; sea surface temperature ; soil moisture
英文摘要: Both sea surface temperatures (SSTs) and soil moisture (SM) can influence climate over land. This paper presents a comprehensive comparison of SM versus SST impacts on land climate in the warm season. The authors perform fully coupled ensemble experiments with the Community Earth System Model in which they prescribe SM or SSTs to the long-term median seasonal cycles. It is found that SM variability overall impacts warm-season land climate to a similar extent as SST variability, in the midlatitudes, tropics, and subtropics. Removing SM or SST variability impacts land climate means and reduces land climate variability at different time scales by 10%-50% (temperature) and 0%-10% (precipitation). Both SM- and SST-induced changes are strongest for hot temperatures (up to 50%) and for extreme precipitation (up to 20%). These results are qualitatively similar for the present day and the end of the twenty-first century. Removed SM variability affects surface climate through corresponding variations in surface energy fluxes, and this is controlled to first order by the land-atmosphere coupling strength and the natural SM variability. SST-related changes are partly controlled by the relation of local temperature or precipitation with the El Niño-Southern Oscillation. In addition, in specific regions SST-induced SM changes alter the "direct" SST-induced climate changes; on the other hand, SM variability is found to slightly affect SSTs in some regions. Nevertheless a large level of independence is found between SM-climate and SST-climate coupling. This highlights the fact that SM conditions can influence land climate variables independently of any SST effects and that (initial) soil moisture anomalies can provide valuable information in (sub)seasonal weather forecasts. © 2017 American Meteorological Society.
资助项目: ERC, European Research Council
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49791
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作者单位: Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland

Recommended Citation:
Orth R.,Seneviratne S.I.. Variability of soil moisture and sea surface temperatures similarly important for warm-season land climate in the community earth system model[J]. Journal of Climate,2017-01-01,30(6)
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