A simple and efficient method for correction of basin-scale evapotranspiration on the tibetan plateau

Feng，Yuqing1; Kuang，Xingxing1; Liang，Sihai2; Liu，Suning1; Yao，Yingying3; Xie，Yueqing4; Zheng，Chunmiao1

2021-10-01

10.3390/rs13193958

Remote Sensing   影响因子和分区

2072-4292

Evapotranspiration (ET) is one of the important components of the global hydrologic cycle, energy exchange, and carbon cycle. However, basin scale actual ET (hereafter ETa) is difficult to estimate accurately. We present an evaluation of four actual ET products (hereafter ETp) in seven sub-basins in the Tibetan Plateau. The actual ET calculated by the water balance method (hereafter ETref) was used as the reference for correction of the different ETp. The ETref and ETp show obvious seasonal cycles, but the ETp overestimated or underestimated the ET of the sub-basins in the Tibetan Plateau. A simple and effective method was proposed to correct the basin-scale ETp. The method was referred to as ratio bias correction, and it can effectively remove nearly all biases of the ETp. The proposed method is simpler and more effective in correcting the four ETp compared with the gamma distribution bias correction method. The reliability of the ETp is significantly increased after the ratio bias correction. The ratio bias correction method was used to correct the ETp in the seven sub-basins in the Tibetan Plateau, and regional ET was significantly improved. The results may help improve estimation of the ET of the Tibetan Plateau and thereby contribute to a better understanding of the hydrologic cycle of the plateau.

Evapotranspiration GRACE Ratio bias correction method Tibetan Plateau Water balance method

EI ; SCI

英语

第一 ; 通讯

National Natural Science Foundation of China[91747204,92047202] ; High-level Special Funding of the Southern University of Science and Technology["G02296302","G02296402"] ; China Geological Survey[DD20191006]

Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology

Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology

WOS:000726772000001

MDPI

20214110997776

Electromagnetic wave attenuation ; Hydrology

Electromagnetic Waves:711

2-s2.0-85116486725

Scopus

1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Ave,518055,China
2.School of Water Resources and Environment,China University of Geosciences (Beijing),Beijing,29 Xueyuan Road,430074,China
3.Department of Earth and Environmental Science,School of Human Settlements and Civil Engineering,Xi’an Jiaotong University,Xi’an,710000,China
4.Key Laboratory of Surficial Geochemistry,Ministry of Education,School of Earth Sciences and Engineering,Nanjing University,Nanjing,210093,China

Feng，Yuqing,Kuang，Xingxing,Liang，Sihai,et al. A simple and efficient method for correction of basin-scale evapotranspiration on the tibetan plateau[J]. Remote Sensing,2021,13(19).

Feng，Yuqing.,Kuang，Xingxing.,Liang，Sihai.,Liu，Suning.,Yao，Yingying.,...&Zheng，Chunmiao.(2021).A simple and efficient method for correction of basin-scale evapotranspiration on the tibetan plateau.Remote Sensing,13(19).

Feng，Yuqing,et al."A simple and efficient method for correction of basin-scale evapotranspiration on the tibetan plateau".Remote Sensing 13.19(2021).