Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Interaction of equatorial waves through resonance with the diurnal cycle of tropical heating

Texto completo
Autor(es):
Raupp, Carlos F. M. [1] ; Dias, Pedro L. Silva [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Atmospher Sci, Inst Astron Geophys & Atmospher Sci, Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY; v. 62, n. 5, p. 706-718, OCT 2010.
Citações Web of Science: 4
Resumo

In this work, a new theoretical mechanism is presented in which equatorial Rossby and inertio-gravity wave modes may interact with each other through resonance with the diurnal cycle of tropical deep convection. We have adopted the two-layer incompressible equatorial primitive equations forced by a parametric heating that roughly represents deep convection activity in the tropical atmosphere. The heat source was parametrized in the simplest way according to the hypothesis that it is proportional to the lower-troposphere moisture convergence, with the background moisture state function mimicking the structure of the ITCZ. In this context, we have investigated the possibility of resonant interaction between equatorially trapped Rossby and inertio-gravity modes through the diurnal cycle of the background moisture state function. The reduced dynamics of a single resonant duo shows that when this diurnal variation is considered, a Rossby wave mode can undergo significant amplitude modulations when interacting with an inertio-gravity wave mode, which is not possible in the context of the resonant triad non-linear interaction. Therefore, the results suggest that the diurnal variation of the ITCZ can be a possible dynamical mechanism that leads the Rossby waves to be significantly affected by high frequency modes. (AU)

Processo FAPESP: 06/53606-0 - Interação entre ondas equatoriais atmosféricas através da ressonância com a convecção úmida
Beneficiário:Carlos Frederico Mendonça Raupp
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 09/11643-4 - Interações multi-escala na atmosfera
Beneficiário:Carlos Frederico Mendonça Raupp
Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores