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Experiments using new initial soil moisture conditions and soil map in the Eta model over La Plata Basin |
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| Authors: | Moira E Doyle Javier Tomasella Daniel A Rodriguez Sin Chan Chou |
| Institution: | 1. Centro de Investigaciones del Mar y la Atmosfera (CIMA/CONICET-UBA)-UMI IFAECI/CNRS, Buenos Aires, Argentina 2. Departamento de Ciencias de la Atmósfera y los Océanos, FCEyN, Univ. Buenos Aires, Buenos Aires, Argentina 3. Instituto Nacional de Pesquisas Espaciais, Centro de Ciência do Sistema Terrestre (CCST–INPE, Brazil), S?o paulo, Brazil 4. Centro Nacional de Monitoramento e Alertas de Desastres Naturais (CEMADEN, Brazil), S?o paulo, Brazil |
| Abstract: | An effort towards a more accurate representation of soil moisture and its impact on the modeling of weather systems is presented. Sensitivity tests of precipitation to soil type and soil moisture changes are carried out using the atmospheric Eta model for the numerical simulation of the development of a mesoscale convective system over northern Argentina. Modified initial soil moisture conditions were obtained from a hydrological balance model developed and running operationally at INPE. A new soil map was elaborated using the available soil profile information from Brazil, Paraguay, Uruguay, and Argentina and depicts 18 different soil types. Results indicate that more accurate initial soil moisture conditions and incorporating a new soil map with hydraulic parameters, more representative of South American soils, improve daily total precipitation forecasts both in quantitative and spatial representations. |
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