Arid
DOI10.1016/j.agrformet.2013.12.009
Inversion of soil hydraulic properties from the DEnKF analysis of SMOS soil moisture over West Africa
Lee, J. H.1,3; Pellarin, T.2; Kerr, Y. H.3
通讯作者Lee, J. H.
来源期刊AGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
EISSN1873-2240
出版年2014
卷号188页码:76-88
英文摘要

The application of Soil-Vegetation-Atmosphere-Transfer (SVAT) scheme into the estimation of soil moisture profile in semi-arid regions is largely constrained by a scarcity of spatially distributed soil and hydraulic property information. Especially, on a large scale in very dry and sandy soils or other extreme conditions, it is difficult to accurately map soil and hydraulic properties with soil maps-based Pedo-Transfer Functions (PTFs), because PTFs are usually semi-empirically defined for specific sites. One strategy to overcome this limitation is to employ satellite data for a purpose of calibration. This paper provides an operational framework of inverting the SVAT soil hydraulic variables from the deterministic ensemble Kalman filter (DEnKF) analysis of Soil Moisture and Ocean Salinity (SMOS) surface soil moisture product. This inverse calibration was first verified with the Analyses Multidisciplinaires de la Mousson Africaine (AMMA) super site data representative of a single grid cell (0.25 degrees) of satellite data. At this local scale, the results demonstrated that the mis-estimation problems of soil surface variable C-1 and equilibrium soil moisture theta(geq) were successfully solved after calibration, demonstrating a better agreement with the field measurement of soil moisture profile than the SMOS product and un-calibrated SVAT scheme using soil maps-based PTFs. On the meso scale, the calibrated SVAT scheme using inverted surface variables appropriately captured a non-linear relationship between surface and root zone soil moisture by showing a typical soil moisture profile in dry climates, where dry surface soil moisture is spatially consistent with rainfall events, but wet root zone soil moisture shows low correlations with surface soil moisture distributions and rainfall events. In contrast, the un-calibrated SVAT scheme using soil maps-based PTFs significantly overestimated surface soil moisture and rainfall effect. This approach suggests several operational merits in that there is no need to heavily rely on empirically defined PTFs or recalibrate land surface parameters for different land surface conditions, and this can be applied even when parameter measurements are unavailable or highly uncertain. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.


英文关键词SMOS surface soil moisture ISBA land surface parameterization DEnKF SVAT model Parameter inversion Soil and hydraulic property in semi-arid regions
类型Article
语种英语
国家Italy ; France
收录类别SCI-E
WOS记录号WOS:000331860500008
WOS关键词ENSEMBLE KALMAN FILTER ; LAND-SURFACE PROCESSES ; PARAMETER-ESTIMATION ; MICROWAVE EMISSION ; SVAT-MODEL ; DATA ASSIMILATION ; CALIBRATION ; VEGETATION ; FLOW ; TEMPERATURE
WOS类目Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构French National Research Institute for Sustainable Development ; E17
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/180486
作者单位1.Politecn Milan, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy;
2.LTHE, F-38041 Grenoble 09, France;
3.CESBIO, UMR 5126, F-31401 Toulouse, France
推荐引用方式
GB/T 7714
Lee, J. H.,Pellarin, T.,Kerr, Y. H.. Inversion of soil hydraulic properties from the DEnKF analysis of SMOS soil moisture over West Africa[J]. French National Research Institute for Sustainable Development, E17,2014,188:76-88.
APA Lee, J. H.,Pellarin, T.,&Kerr, Y. H..(2014).Inversion of soil hydraulic properties from the DEnKF analysis of SMOS soil moisture over West Africa.AGRICULTURAL AND FOREST METEOROLOGY,188,76-88.
MLA Lee, J. H.,et al."Inversion of soil hydraulic properties from the DEnKF analysis of SMOS soil moisture over West Africa".AGRICULTURAL AND FOREST METEOROLOGY 188(2014):76-88.
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