Cross-evaluation of modelled and remotely sensed surface soil moisture with in situ data in southwestern France

被引：82

作者：

Albergel, C. ^{[1
]}

Calvet, J. -C. ^{[1
]}

de Rosnay, P. ^{[2
]}

Balsamo, G. ^{[2
]}

Wagner, W. ^{[3
]}

Hasenauer, S. ^{[3
]}

Naeimi, V. ^{[3
]}

Martin, E. ^{[1
]}

Bazile, E. ^{[1
]}

Bouyssel, F. ^{[1
]}

Mahfouf, J. -F. ^{[1
]}

机构：

[1] Meteo France, CNRS, CNRM GAME, URA 1357, Toulouse, France

[2] European Ctr Medium Range Weather Forecasts, Reading RG2 9AX, Berks, England

[3] Vienna Univ Technol, Inst Photogrammetry & Remote Sensing, A-1040 Vienna, Austria

来源：

HYDROLOGY AND EARTH SYSTEM SCIENCES | 2010年 / 14卷 / 11期

关键词：

ERS SCATTEROMETER; TEMPORAL STABILITY; SPATIAL SCALES; WATER-BUDGET; ASSIMILATION; SCHEME; IMPLEMENTATION; SIMULATION; PREDICTION; INCLUSION;

D O I：

10.5194/hess-14-2177-2010

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The SMOSMANIA soil moisture network in Southwestern France is used to evaluate modelled and remotely sensed soil moisture products. The surface soil moisture (SSM) measured in situ at 5 cm permits to evaluate SSM from the SIM operational hydrometeorological model of Meteo-France and to perform a cross-evaluation of the normalised SSM estimates derived from coarse-resolution (25 km) active microwave observations from the ASCAT scatterometer instrument (C-band, onboard METOP), issued by EUMETSAT and resampled to the Discrete Global Grid (DGG, 12.5 km gridspacing) by TU-Wien (Vienna University of Technology) over a two year period (2007-2008). A downscaled ASCAT product at one kilometre scale is evaluated as well, together with operational soil moisture products of two meteorological services, namely the ALADIN numerical weather prediction model (NWP) and the Integrated Forecasting System (IFS) analysis of Meteo-France and ECMWF, respectively. In addition to the operational SSM analysis of ECMWF, a second analysis using a simplified extended Kalman filter and assimilating the ASCAT SSM estimates is tested. The ECMWF SSM estimates correlate better with the in situ observations than the Meteo-France products. This may be due to the higher ability of the multi-layer land surface model used at ECMWF to represent the soil moisture profile. However, the SSM derived from SIM corresponds to a thin soil surface layer and presents good correlations with ASCAT SSM estimates for the very first centimetres of soil. At ECMWF, the use of a new data assimilation technique, which is able to use the ASCAT SSM, improves the SSM and the root-zone soil moisture analyses.

引用

页码：2177 / 2191

页数：15

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