Energy and Water Balance at Soil-Air Interface in a Sahelian Region

被引:0
|
作者
Minwei Qian
N. Loglisci
C. Cassardo
A. Longhetto
C. Giraud
机构
[1] University of Turin,Department of General Physics
[2] Chinese Academy of Sciences,Institute of Atmospheric Physics
[3] National Research Council (CNR),Institute of Cosmo
[4] ICSC-World Laboratory,Geophysics
来源
Advances in Atmospheric Sciences | 2001年 / 18卷
关键词
Drought; Heavy rain; Water vapour; Soil moisture; Evaporation; LSPM; SVAT; HAPEX; Sahel; Niger;
D O I
暂无
中图分类号
学科分类号
摘要
The aim of this work is an improvement of the parameterization of the soil moisture in the scheme of the Land Surface Process Model (LSPM) for applications over desert areas. In fact, in very dry conditions, the water vapour flux plays an important role in the evaporation processes and influences the underground profiles of humidity and temperature. The improved version of soil moisture parameterization in the LSPM scheme has been checked by using the data taken from the database of the field experiment HAPEX-Sahel (Hydrology-Atmosphere Pilot Experiment in the Sahel. 1990-1992). Model simulations refer to three different stations located in Niger (Fallow, Millet and Tiger sites) where input data for LSPM and observations were simultaneously available. The results of simulations, taking into account the water vapour flux in the soil model LSPM, seem to compare better with the observed behaviour of soil moisture and turbulent heat fluxes than those overlooking the water vapour flux, confirming the great importance of the water vapour in such dry conditions.
引用
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页码:897 / 909
页数:12
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