| Texto completo | |
| Autor(es): |
Dias Pinto, Joao Rafael
;
Mitchell, Jonathan Lloyd
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF THE ATMOSPHERIC SCIENCES; v. 73, n. 8, p. 3181-3196, AUG 2016. |
| Citações Web of Science: | 4 |
| Resumo | |
The interplay between mean meridional circulation and transient eddies through wave-mean flow interaction processes defines the general behavior of any planetary atmospheric circulation. Under a higher-Rossby-number regime, equatorward momentum transports provided by large-scale disturbances generate a strong zonal flow at the equatorial region. At intermediate Rossby numbers, equatorial Kelvin waves play a leading role in maintaining a superrotating jet over the equator. However, at high Rossby numbers, the Kelvin wave only provides equatorward momentum fluxes during spinup, and the wave-mean flow process that maintains this strongly superrotating state has yet to be identified. This study presents a comprehensive analysis of the tridimensional structure and life cycle of atmospheric waves and their interaction with the mean flow, which maintains the strong, long-lived superrotating state in a higher-Rossby-number-regime atmosphere. The results show that the mean zonal superrotating circulation is maintained by the dynamical interaction between mixed baroclinic-barotropic Rossby wave modes via low-frequency variations of the zonal-mean state in short and sporadic periods of stronger instability. The modulation of amplitude of the equatorial and extratropical Rossby waves suggests a nonlinear mechanism of eddy-eddy interaction between these modes. (AU) | |
| Processo FAPESP: | 10/15174-6 - Circulação geral e manutenção da superrotação da atmosfera de Titã |
| Beneficiário: | João Rafael Dias Pinto |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 12/13202-8 - Interação onda-escoamento médio e superrotação atmosférica em planetas terrestres |
| Beneficiário: | João Rafael Dias Pinto |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |