DEVELOPMENT AND VALIDATION OF THE SMOS-IC VERSION 2 (V2) SOIL MOISTURE PRODUCT

被引：13

作者：

Li, Xiaojun ^{[1
]}

Wigneron, J-P ^{[1
]}

Frappart, F. ^{[1
,2
]}

Fan, Lei ^{[1
,3
]}

Wang, Mengjia ^{[1
,4
]}

Liu, Xiangzhuo ^{[1
]}

Al-Yaari, A. ^{[1
,5
]}

Moisy, C. ^{[1
]}

机构：

[1] INRAE, UMR1391 ISPA, Villenave Dornon, France

[2] Lab Etud Geophys & Oceanog Spatiales LEGOS, Toulouse, France

[3] Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing, Peoples R China

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

[5] Sorbonne Univ, UMR 7619, METIS, Case 105,4 Pl Jussieu, Paris, France

来源：

IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM | 2020年

关键词：

SMOS-IC; L-band; SMOS; vegetation optical depth; soil moisture; validation; L-BAND; MICROWAVE EMISSION; CALIBRATION; MODEL;

D O I：

10.1109/IGARSS39084.2020.9323324

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

Since the first version of the SMOS-IC retrieval product was released in 2017, its soil moisture (SM) and L-band Vegetation Optical depth (VOD) retrievals have proven to be a very interesting alternative product for the SMOS mission. This product relies on a two-parameter inversion of the L-MEB model (L-band Microwave Emission of the Biosphere) which is independent of auxiliary data, a key feature making it well-suited for application in hydrology, agriculture, climate, and carbon cycle. This paper describes the development and validation of the most recent SMOS-IC version (V2) soil moisture product. Compared with the previous version (V105), a new constraint was applied on VOD in the cost function which is minimized in the retrieval process. Soil moisture retrievals from SMOS-IC V2 & V105 were inter-compared against the "European Centre for Medium-Range Weather Forecasts" (ECMWF) modelled SM and the "International Soil Moisture Network" (ISMN) in-situ measurements during 2011-2017 over France. It was found that the average retrieval uncertainty of the new version product was lower than that of the old version, particularly when vegetation density increased. The new version of the SMOS-IC soil moisture product will be made available to the public through the CATDS (Centre Aval de Traitements des Donnees SMOS) website.

引用

页码：4434 / 4437

页数：4

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