中国科学数据（中英文网络版）2025，Vol.10Issue(2)：156-171,16.DOI:10.11922/11-6035.csd.2024.0082.zh
青藏高原2011-2020年500米分辨率陆面蒸散发产品集
Evapotranspiration dataset of 500 m resolution on the Qinghai-Xizang Plateau from 2011 to 2020
摘要
Abstract
Evapotranspiration(ET)is an essential component of terrestrial water cycle,energy balance,and carbon cycle,and has significant impacts on ecosystem health and climate change.The Qinghai-Tibet Plateau is also an important component of the global water cycle and ecosystem,and its water resources and ecological environment are of great significance to the development and survival of the Asian region.This study proposes a PT-SIMI(Shortwave Infrared Soil Moisture Index Based Priestley Taylor Model)model suitable for the unique characteristics of the Qinghai-Tibet Plateau.In the PT-SIMI model,adjustments were made to the soil moisture constraint factor and fraction of green vegetation,and a remote sensing evapotranspiration estimation model more suitable for the Qinghai-Xizang Plateau was developed.The estimation results were validated using on-site measured data,Bias is-0.52 Wm-2,RMSE is 21.14Wm-2,R2 is 0.74.The results showed that the PT-SIMI model has higher accuracy than the MS-PT(A Modified Satellite Based Priestley Taylor Model)and PT-JPL(Priestley Taylor Jet Propulsion Laboratory)models,making it more suitable for application on the Qinghai-Xizang Plateau.On this basis,the PT-SIMI model was used to estimate the evapotranspiration of the Qinghai-Xizang Plateau,and monthly,quarterly,and annual evapotranspiration dataset with a resolution of 500 meters from 2011 to 2020 were generated,which can be used for water resource management,drought monitoring,climate change,and ecological environment analysis of the Qinghai-Xizang Plateau.关键词
青藏高原/蒸散发/PT-SIMI模型/土壤湿度限制因子/植被绿叶比例Key words
Qinghai-Xizang Plateau/Evapotranspiration(ET)/PT-SIMI model/soil moisture constraint/fraction of green vegetation引用本文复制引用
焦伟利,林子镕,龙腾飞,何国金..青藏高原2011-2020年500米分辨率陆面蒸散发产品集[J].中国科学数据（中英文网络版）,2025,10(2):156-171,16.基金项目
第二次青藏高原综合科学考察和研究计划(2019QZKK0307) The Second Tibetan Plateau Scientific Expedition and Research Program(STEP,No.2019QZKK0307) （2019QZKK0307）
