DOI: 10.1002/2016GL070819
论文题名: Evaporation estimates using weather station data and boundary layer theory
作者: Gentine P. ; Chhang A. ; Rigden A. ; Salvucci G.
刊名: Geophysical Research Letters
ISSN: 0094-8379
EISSN: 1944-8110
出版年: 2016
卷: 43, 期: 22 起始页码: 11661
结束页码: 11670
语种: 英语
英文关键词: boundary layer
; evaporation
; land-atmosphere interactions
; weather station
Scopus关键词: Atmospheric temperature
; Atmospheric temperature
; Boundary layers
; Boundary layers
; Budget control
; Budget control
; Evaporation
; Evaporation
; Heat flux
; Heat flux
; Remote sensing
; Remote sensing
; Weather information services
; Weather information services
; Available energy
; Available energy
; Boundary layer theory
; Boundary layer theory
; Cloudy conditions
; Cloudy conditions
; Evaporative fraction
; Evaporative fraction
; Land atmosphere interaction
; Land atmosphere interaction
; Sensible heat flux
; Sensible heat flux
; Specific humidity
; Specific humidity
; Weather stations
; Weather stations
; Evapotranspiration
; Evapotranspiration
英文摘要: Global estimates of evapotranspiration remain a challenge. In this study, we show that the daily course of air temperature and specific humidity available at routine weather stations can be used to estimate evapotranspiration and the evaporative fraction, the ratio of latent heat flux to available energy at the surface. Indeed, the diurnal increase in air temperature reflects the magnitude of the sensible heat flux and the increase of specific humidity after sunrise reflects the amplitude of evapotranspiration. The method is physically constrained and based on the budget of heat and moisture in the boundary layer. Unlike land surface-based estimates, the proposed boundary layer estimate does not rely on ad hoc surface resistance parameterizations (e.g., Penman-Monteith). The proposed methodology can be applied to data collected at weather stations to estimate evapotranspiration and evaporative fraction under cloudy conditions and in the pre–remote sensing era. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85004019923&doi=10.1002%2f2016GL070819&partnerID=40&md5=cf7bfaae4f2c14d12e6e19019d5456af
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9342
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: Earth and Environmental Engineering and Earth Institute, Columbia University, New York, NY, United States
Recommended Citation:
Gentine P.,Chhang A.,Rigden A.,et al. Evaporation estimates using weather station data and boundary layer theory[J]. Geophysical Research Letters,2016-01-01,43(22).