DOI: 10.1002/2016GL068178
论文题名: Global observational diagnosis of soil moisture control on the land surface energy balance
作者: Gallego-Elvira B. ; Taylor C.M. ; Harris P.P. ; Ghent D. ; Veal K.L. ; Folwell S.S.
刊名: Geophysical Research Letters
ISSN: 0094-9243
EISSN: 1944-8974
出版年: 2016
卷: 43, 期: 6 起始页码: 2623
结束页码: 2631
语种: 英语
英文关键词: dry spell
; evapotranspiration
; land surface temperature
; sensible heat flux
Scopus关键词: Atmospheric temperature
; Budget control
; Climate models
; Drought
; Evapotranspiration
; Heat flux
; Interfacial energy
; Moisture
; Moisture control
; Rain
; Soils
; Surface measurement
; Surface properties
; Vegetation
; Antecedent rainfall
; Dry spells
; Hydrological properties
; Land surface temperature
; New approaches
; Satellite observations
; Sensible heat flux
; Surface energy budget
; Soil moisture
; bare soil
; climate modeling
; energy balance
; evapotranspiration
; land surface
; precipitation assessment
; sensible heat flux
; soil moisture
; surface temperature
; vegetation cover
英文摘要: An understanding of where and how strongly the surface energy budget is constrained by soil moisture is hindered by a lack of large-scale observations, and this contributes to uncertainty in climate models. Here we present a new approach combining satellite observations of land surface temperature and rainfall. We derive a Relative Warming Rate (RWR) diagnostic, which is a measure of how rapidly the land warms relative to the overlying atmosphere during 10 day dry spells. In our dry spell composites, 73% of the land surface between 60°S and 60°N warms faster than the atmosphere, indicating water-stressed conditions, and increases in sensible heat. Higher RWRs are found for shorter vegetation and bare soil than for tall, deep-rooted vegetation, due to differences in aerodynamic and hydrological properties. We show how the variation of RWR with antecedent rainfall helps to identify different evaporative regimes in the major nonpolar climate zones. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978010033&doi=10.1002%2f2016GL068178&partnerID=40&md5=f49665bec35b8927d53c9c7ad4ed6d69
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10206
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Centre for Ecology and Hydrology, Wallingford, United Kingdom
Recommended Citation:
Gallego-Elvira B.,Taylor C.M.,Harris P.P.,et al. Global observational diagnosis of soil moisture control on the land surface energy balance[J]. Geophysical Research Letters,2016-01-01,43(6).