干旱区生态环境知识资源中心(Arid): Surface Flux Equilibrium Estimates of Evapotranspiration at Large Spatial Scales

Arid

DOI	10.1175/JHM-D-20-0204.1
	Surface Flux Equilibrium Estimates of Evapotranspiration at Large Spatial Scales
	Chen, Shiliu; McColl, Kaighin A.; Berg, Alexis; Huang, Yuefei
通讯作者	McColl, KA (corresponding author), Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA. ; McColl, KA (corresponding author), Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA.
来源期刊	JOURNAL OF HYDROMETEOROLOGY
ISSN	1525-755X
EISSN	1525-7541
出版年	2021
卷号	22 期号:4 页码:765-779
英文摘要	A recent theory proposes that inland continental regions are in a state of surface flux equilibrium (SFE), in which tight coupling between the land and atmosphere allow estimation of the Bowen ratio at daily to monthly time scales solely from atmospheric measurements, without calibration, even when the land surface strongly constrains the surface energy budget. However, since the theory has only been evaluated at quasi-point spatial scales using eddy covariance measurements with limited global coverage, it is unclear if it is applicable to the larger spatial scales relevant to studies of global climate. In this study, SFE estimates of the Bowen ratio are combined with satellite observations of surface net radiation to obtain large-scale estimates of latent heat flux lambda E. When evaluated against multiyear mean annual lambda E obtained from catchment water balance estimates from 221 catchments across the United States, the resulting error statistics are comparable to those in the catchment water balance estimates themselves. The theory is then used to diagnostically estimate lambda E using historical simulations from 26 CMIP6 models. The resulting SFE estimates are typically at least as accurate as the CMIP6 model's simulated lambda E, when compared with catchment water balance estimates. Globally, there is broad spatial and temporal agreement between CMIP6 model SFE estimates and the CMIP6 model's simulated lambda E, although SFE likely overestimates lambda E in some arid regions. We conclude that SFE applies reasonably at large spatial scales relevant to climate studies, and is broadly reproduced in climate models.
英文关键词	Evaporation Evapotranspiration Hydrologic cycle Latent heating cooling
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000644214500002
WOS关键词	BOUNDARY-LAYER ; POTENTIAL EVAPORATION ; HEAT-FLUX ; MODEL ; WATER ; TERRESTRIAL ; SOIL ; PRECIPITATION ; VARIABILITY ; ATMOSPHERE
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	清华大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350920
作者单位	[Chen, Shiliu; McColl, Kaighin A.; Berg, Alexis] Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; [Chen, Shiliu; Huang, Yuefei] Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing, Peoples R China; [McColl, Kaighin A.] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA; [Huang, Yuefei] Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Chen, Shiliu,McColl, Kaighin A.,Berg, Alexis,et al. Surface Flux Equilibrium Estimates of Evapotranspiration at Large Spatial Scales[J]. 清华大学,2021,22(4):765-779.
APA	Chen, Shiliu,McColl, Kaighin A.,Berg, Alexis,&Huang, Yuefei.(2021).Surface Flux Equilibrium Estimates of Evapotranspiration at Large Spatial Scales.JOURNAL OF HYDROMETEOROLOGY,22(4),765-779.
MLA	Chen, Shiliu,et al."Surface Flux Equilibrium Estimates of Evapotranspiration at Large Spatial Scales".JOURNAL OF HYDROMETEOROLOGY 22.4(2021):765-779.