Estimation of regional evapotranspiration over the Southern Great Plains based on Penman-Monteith theory and the soil moisture estimates
文献类型: 外文期刊
第一作者: Sun Liang
作者: Sun Liang
作者机构:
关键词: ET;Penman-Monteith;triangle;soil moisture;MODIS
期刊名称:THIRD INTERNATIONAL CONFERENCE ON AGRO-GEOINFORMATICS (AGRO-GEOINFORMATICS 2014)
ISSN: 2334-3168
年卷期: 2014 年
页码:
收录情况: SCI
摘要: Penman-Monteith (PM) theory is a classic method to calculate evapotranspiration (ET) of land surfaces. However, soil resistance, related to soil moisture, is always difficult to determine over a large region. In this study, we developed an ET estimation algorithm by incorporating a soil moisture index (SMI) derived from the improved surface temperature-vegetation cover feature space, denoted as the PM-SMI algorithm. The PM-SMI algorithm was compared with the triangle algorithm and another Penman-Monteith based algorithm (PM-Yuan) that calculated soil evaporation using relative humidity. The three ET algorithms are compared and validated by Bowen Ratio measurements at 12 sites in the Southern Great Plain (SGP) that were mainly covered by grassland and cropland with low vegetation cover. The results showed that the PM-SMI algorithm performs the best among the three ET algorithms both on the instantaneous scale with R-2 of 0.86, RMSE of 53.67 W/m(2), bias of 6.83 W/m(2) and the daily scale with R-2 of 0.87, RMSE of 39.07 W/m(2), and bias of -4.04 W/m(2). PM-Yuan algorithm significantly underestimates ET resulting from soil evaporation and compared to triangle ET algorithm, PM-SMI is more reliable for estimation of ET over regional scale.
分类号:
- 相关文献
作者其他论文 更多>>
-
A review of data assimilation of crop growth simulation based on remote sensing information
作者:Jiang Zhiwei;Chen Zhongxin;Liu Jia;Sun Liang;Jiang Zhiwei;Chen Zhongxin;Liu Jia;Sun Liang
关键词:Data assimilation;Crop growth model;Remote sensing;Forcing method;Calibration method;Updating method
-
Analysis of murine B-cell epitopes on Eastern equine encephalitis virus glycoprotein E2
作者:Sun EnCheng;Zhao Jing;Yang Tao;Xu QingYuan;Qin YongLi;Wang WenShi;Wei Peng;Sun Liang;Sun Jing;Wu DongLai
关键词:Eastern equine encephalitis virus;E2 protein;B-cell epitope mapping
-
Analysis of murine B-cell epitopes on bluetongue virus 12 nonstructural protein 1
作者:Wang HaiXiu;Sun EnCheng;Xu QingYuan;Yang Tao;Zhang Qin;Feng YuFei;Li JunPing;Lv Shuang;Sun Liang;Sun Jing;Wu DongLai
关键词:Bluetongue virus;NS1 protein;MAbs;PAbs;Epitopes
-
Retrieval of land surface temperature from FY3D MERSI-II based on re-fitting Split Window Algorithm
作者:Zhang Dejun;Yang Shiqi;Liu Xiaoran;Zhu Hao;Ye Qinyu;Zhang Xinyu;Zhang Dejun;Yang Shiqi;Liu Xiaoran;Zhu Hao;Ye Qinyu;Zhang Xinyu;Sun Liang;Tang Shihao
关键词:FY3D; MERSI-II; split-window; land surface temperature