MODIS-Based Estimation of Terrestrial Latent Heat Flux over North America Using Three Machine Learning Algorithms

作者:Wang, XY (Wang, Xuanyu)[ 1,2 ] ; Yao, YJ (Yao, Yunjun)[ 1,2 ] ; Zhao, SH (Zhao, Shaohua)[ 3 ] ; Jia, K (Jia, Kun)[ 1,2 ] ; Zhang, XT (Zhang, Xiaotong)[ 1,2 ] ; Zhang, YH (Zhang, Yuhu)[ 4 ] ; Zhang, LL (Zhang, Lilin)[ 1,2 ] ; Xu, J (Xu, Jia)[ 1,2 ] ; Chen, XW (Chen, Xiaowei)[ 1,2 ]

REMOTE SENSING

卷: 9  期: 12

文献号: 1326

DOI: 10.3390/rs9121326

出版年: DEC 2017

摘要

Terrestrial latent heat flux (LE) is a key component of the global terrestrial water, energy, and carbon exchanges. Accurate estimation of LE from moderate resolution imaging spectroradiometer (MODIS) data remains a major challenge. In this study, we estimated the daily LE for different plant functional types (PFTs) across North America using three machine learning algorithms: artificial neural network (ANN); support vector machines (SVM); and, multivariate adaptive regression spline (MARS) driven by MODIS and Modern Era Retrospective Analysis for Research and Applications (MERRA) meteorology data. These three predictive algorithms, which were trained and validated using observed LE over the period 2000-2007, all proved to be accurate. However, ANN outperformed the other two algorithms for the majority of the tested configurations for most PFTs and was the only method that arrived at 80% precision for LE estimation. We also applied three machine learning algorithms for MODIS data and MERRA meteorology to map the average annual terrestrial LE of North America during 2002-2004 using a spatial resolution of 0.05 degrees, which proved to be useful for estimating the long-term LE over North America.

通讯作者地址: Yao, YJ (通讯作者)

Beijing Normal Univ, Fac Geog Sci, State Key Lab Remote Sensing Sci, Beijing 100875, Peoples R China.

通讯作者地址: Yao, YJ (通讯作者)

Beijing Normal Univ, Inst Remote Sensing Sci & Engn, Fac Geog Sci, Beijing Engn Res Ctr Global Land Remote Sensing P, Beijing 100875, Peoples R China.

地址:

[ 1 ] Beijing Normal Univ, Fac Geog Sci, State Key Lab Remote Sensing Sci, Beijing 100875, Peoples R China

[ 2 ] Beijing Normal Univ, Inst Remote Sensing Sci & Engn, Fac Geog Sci, Beijing Engn Res Ctr Global Land Remote Sensing P, Beijing 100875, Peoples R China

[ 3 ] Minist Environm Protect, Satellite Environm Ctr, Beijing 100094, Peoples R China

[ 4 ] Capital Normal Univ, Coll Resource Environm & Tourism, Beijing 100048, Peoples R China