The Reliability of Global Remote Sensing Evapotranspiration Products over Amazon

Wu, Jie1; Lakshmi, Venkataraman2; Wang, Dashan1; Lin, Peirong3; Pan, Ming3; Cai, Xitian4; Wood, Eric F.3; Zeng, Zhenzhong1

2020-07

10.3390/rs12142211

Remote Sensing   影响因子和分区

2072-4292

2072-4292

As a key component of terrestrial water cycle, evapotranspiration (ET), specifically over the Amazon River basin, is of high scientific significance. However, due to the sparse observation network and relatively short observational period of eddy covariance data, large uncertainties remain in the spatial-temporal characteristics of ET over the Amazon. Recently, a great number of long-term global remotely sensed ET products have been developed to fill the observation gap. However, the reliabilities of these global ET products over the Amazon are unknown. In this study, we assessed the consistency of the magnitude, trend and spatial pattern of Amazon ET among five global remotely sensed ET reconstructions. The magnitudes of these products are similar but the long-term trends from 1982 to 2011 are completely divergent. Validation from the eddy covariance data and water balance method proves a better performance of a product grounded on local measurements, highlighting the importance of local measurements in the ET reconstruction. We also examined four hypotheses dealing with the response of ET to brightening, warming, greening and deforestation, which shows that in general, these ET products respond better to warming and greening than to brightening and deforestation. This large uncertainty highlights the need for future studies focusing on ET issues over the Amazon.

evapotranspiration global product Amazon consistency response deforestation

SCI ; EI

英语

第一 ; 通讯

Southern University of Science and Technology[29/Y01296122] ; Highlight Project on Water Security and Global Change of the Southern University of Science and Technology (SUSTech)[G02296302]

Remote Sensing

Remote Sensing

WOS:000554280400001

MDPI

20203108995009

Remote sensing ; Evapotranspiration

Agricultural Equipment and Methods; Vegetation and Pest Control:821

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
2.Univ Virginia, Dept Engn Syst & Environm, Charlottesville, VA 22904 USA
3.Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA
4.Lawrence Berkeley Natl Lab, Climate & Ecosyst Sci Div, Berkeley, CA 94720 USA

Wu, Jie,Lakshmi, Venkataraman,Wang, Dashan,et al. The Reliability of Global Remote Sensing Evapotranspiration Products over Amazon[J]. Remote Sensing,2020,12(14).

Wu, Jie.,Lakshmi, Venkataraman.,Wang, Dashan.,Lin, Peirong.,Pan, Ming.,...&Zeng, Zhenzhong.(2020).The Reliability of Global Remote Sensing Evapotranspiration Products over Amazon.Remote Sensing,12(14).

Wu, Jie,et al."The Reliability of Global Remote Sensing Evapotranspiration Products over Amazon".Remote Sensing 12.14(2020).