Dynamic cores in mesoscale atmospheric models and their impacts on the explicit simulation of weather systems associated with convective clouds.

• Grant number: 15/10206-0
• Support Opportunities: Regular Research Grants
• Start date: October 01, 2015
• End date: December 31, 2017
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Meteorology
• Principal Investigator: Haroldo Fraga de Campos Velho
• Grantee: Haroldo Fraga de Campos Velho
• Host Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia e Inovação (Brasil). São José dos Campos , SP, Brazil
• Associated researchers: Jairo Panetta

Abstract

We propose studying the roles of applying dynamic cores of high accuracy on numerical simulations of high impact convective weather systems. To accomplish this objective, we plan to include new time integration scheme allied with a high order spatial discretization advection operator in the BRAMS mesoscale model, resulting on a new state-of-the-art dynamic core with overall accuracy of at least 2nd order. In this proposal, we planned studies with several time integration schemes such as Runge-Kutta, Adams-Bashforth-Moulton and others, as well several high order (up to 5th, including monotonicity preserving properties) advection operators. An important technological outcome of this work is the possibility of performing faster integrations with the BRAMS model since larger time steps will become acceptable, with positive impact in the computer efficiency of operational (as an example, CPTEC/INPE) and research centers that apply this modeling system. The new dynamic core will be then employed for explicit simulations of convective rainfall systems with high spatial resolution grids (~ km) and the results will be evaluated by comparisons with simulations using the current dynamic core. Quantitative evaluation will also be performed to objectively state the gain of skill, on meteorological and computational point of views, of the operational numerical weather prediction at 5km grid spacing at CPTEC/INPE. (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)

FREITAS, SAULO R.; PANETTA, JAIRO; LONGO, KARLA M.; RODRIGUES, LUIZ F.; MOREIRA, DEMERVAL S.; ROSARIO, NILTON E.; SILVA DIAS, PEDRO L.; SILVA DIAS, MARIA A. F.; SOUZA, ENIO P.; FREITAS, EDMILSON D.; et al. The Brazilian developments on the Regional Atmospheric Modeling System (BRAMS 5.2): an integrated environmental model tuned for tropical areas. Geoscientific Model Development, v. 10, n. 1, p. 189-222, JAN 13 2017. (15/10206-0, 14/01563-1, 14/01564-8)