DOI: 10.1002/grl.50450
论文题名: Remote estimation of terrestrial evapotranspiration without using meteorological data
作者: Yang Y. ; Long D. ; Shang S.
刊名: Geophysical Research Letters
ISSN: 0094-8851
EISSN: 1944-8582
出版年: 2013
卷: 40, 期: 12 起始页码: 3026
结束页码: 3030
语种: 英语
英文关键词: ecosystem water use efficiency
; evapotranspiration
; gross primary production
; remote sensing
Scopus关键词: Eddy covariance towers
; Gross primary production
; Meteorological data
; Meteorological fields
; Meteorological input
; Satellite remote sensing
; Terrestrial evapotranspiration
; Water use efficiency
; Ecosystems
; Evapotranspiration
; Meteorology
; Radiometers
; Remote sensing
; Water supply
; Estimation
; data set
; eddy covariance
; evapotranspiration
; MODIS
; net primary production
; remote sensing
; satellite data
; North America
英文摘要: We developed a new method to estimate terrestrial evapotranspiration (ET) from satellite data without using meteorological inputs. By analyzing observations from 20 eddy covariance tower sites across continental North America, we found a strong relationship between monthly gross primary production (GPP) and ET (R2 = 0.72-0.97), implying the potential of using the remotely sensed GPP to invert ET. We therefore adopted the Temperature-Greenness model which calculates 16 day GPP using MODIS EVI and LST products to estimate GPP and then to calculate ET by dividing GPP with ecosystem water use efficiency (the ratio of GPP to ET). The proposed method estimated 16 day ET very well by comparison with tower-based measurements (R2 = 0.84, p < 0.001, n = 1290) and provided better ET estimates than the MODIS ET product. This suggests that routine estimation of ET from satellite remote sensing without using fine-resolution meteorological fields is possible and can be very useful for studying water and carbon cycles. Key Points We proposed a remote sensing ET algorithm without using weather data The proposed method estimates ET well across a wide range of bio-climates The proposed method outperforms MODIS ET product in all validation sites ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880562007&doi=10.1002%2fgrl.50450&partnerID=40&md5=7dd6a2c425749c258a773d3b625cbc04
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6115
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
Recommended Citation:
Yang Y.,Long D.,Shang S.. Remote estimation of terrestrial evapotranspiration without using meteorological data[J]. Geophysical Research Letters,2013-01-01,40(12).