Plateau Meteorology

Plateau Meteorology >

2017 , Vol. 36 >Issue 1: 67 - 78

DOI: https://doi.org/10.7522/j.issn.1000-0534.2016.00085

Top-Layer Soil Moisture Retrieval over the Qinghai-Xizang Plateau in Summer Based on AMSR-E Data

  • LI Zhe ,
  • WANG Lei ,
  • WANG Lin ,
  • LI Xiehui ,
  • XIAO Guojie
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  • College of Atmospheric Sciences, Chengdu University of Information Technology, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu 610225, China

Received date: 2016-05-06

  Online published: 2017-02-28

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Abstract

Utilizing AMSR-E brightness temperature data, we adopted a simplified and modified Single Channel Algorithm model (SCA) to estimate the surface soil moisture (SM) of the Qinghai-Xizang Plateau from June to July 2011.To validate and contrast the retrievals, we used two kinds of soil moisture products based on AMSR-E from NASA and VUA-NASA, and in-situ SM data from Maqu network and CTP-SMTMN (Soil Moisture and Temperature Monitoring Network on the central Qinghai-Xizang Plateau, hereafter called Naqu network).The results indicated that:(1) Compared VUA-NASA products with SM retrievals by modified SCA model, the NASA product has a higher MAE (Mean Absolute Error), RMSE (Root Mean Square Error) and a lower correlation coefficient both in pixels and areas, apparently underestimating the SM of the two areas.(2) VUA-NASA product has a good performance in Maqu area, while in Naqu area it has a high correlation coefficient but relatively large MAE and RMSE resulting in a worse precision.(3) In contrast to other two products, modified SCA model has a better accuracy in two areas and provides reliable information on surface SM temporal variability with the low MAE (about 0.050 m3·m-3), RMSE (about 0.060 m3·m-3) and high correlation coefficient (about 0.800).We conclude that the modified SCA model can be applied to SM monitoring in the Qinghai-Xizang Plateau, and offer a good reference to study of climate and weather changes as well as hydrological cycle in the Qinghai-Xizang Plateau.

Key words： The Qinghai-Xizang P; Soil Moisture; AMSR-E; Single Channel Algor

Cite this article

LI Zhe , WANG Lei , WANG Lin , LI Xiehui , XIAO Guojie . Top-Layer Soil Moisture Retrieval over the Qinghai-Xizang Plateau in Summer Based on AMSR-E Data[J]. Plateau Meteorology, 2017 , 36(1) : 67 -78 . DOI: 10.7522/j.issn.1000-0534.2016.00085

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