Refinement of the description and numerical simulation of the surfasse and convection processes in the CPTEC modeling of the atmosphere

• Grant number: 04/13445-1
• Support Opportunities: Regular Research Grants
• Start date: May 01, 2005
• End date: July 31, 2007
• Field of knowledge: Physical Sciences and Mathematics - Geosciences
• Principal Investigator: Saulo Ribeiro de Freitas
• Grantee: Saulo Ribeiro de Freitas
• Host Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia e Inovação (Brasil). São José dos Campos , SP, Brazil

Abstract

Work project on the improvement of the quality of forecasts of the state of the atmosphere in atmospheric models of Cptec and introduction of new functionalities. Efforts will be made to find an improvement in the description and the numerical simulation of surfasse processes responsible for the exchange of internal energy, water and moment between the surface and the atmosphere and in wet convective processes, precipitant or not. In surface processes, efforts will be concentrated on the introduction of global data of vegetation, texture of soil and IVDN updated with high spatial resolution, modern SIB 2.5 surface with patches scheme and operational initiation of ground humidity. In deep convection, we will implement the training procedure with the modern parameterization of Grell cumulus, while in shallow convection we will focus on the introduction of new closing phases in the parameterization of Grell shallow cumulus. Coupling the cumulus scheme with cloud microphysics will be implemented by the explicit tendency of total water in water vapor and water in liquid or solid state.We will also examine the question of coupling between the cumuli schemes themselves (shallow and deep) aimed at improvements in the simulation of the diurnal cycle of precipitation. It is hoped for an effective improvement in the performance of the Cptec models in the numerical simulation of the thermodynamic properties of the planetary boundary layer and of the positioning and temporal occurrence of convective systems. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SAULO R. FREITAS; KARLA M. LONGO; LUIZ F. RODRIGUES. Modelagem numérica da composição química da atmosfera e seus impactos no tempo, clima e qualidade do ar. Revista Brasileira de Meteorologia, v. 24, n. 2, p. 188-207, 2009-06-00. (01/14981-6, 04/13445-1)

FREITAS, S. R.; LONGO, K. M.; DIAS, M. A. F. SILVA; CHATFIELD, R.; DIAS, P. SILVA; ARTAXO, P.; ANDREAE, M. O.; GRELL, G.; RODRIGUES, L. F.; FAZENDA, A.; et al. The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS) - Part 1: Model description and evaluation. Atmospheric Chemistry and Physics, v. 9, n. 8, p. 2843-2861, 2009. (04/13445-1)