E344 外側安定成層を伴う高速回転球殻中の貫入対流により引き起こされる平均帯状流

概要

論文の詳細を見る
Finite amplitude columnar convection in rapidly rotating spherical shells with a stably stratified layer near the outer boundary is calculated numerically. The distributions of the azimuthal component of velocity field show that extent of penetration to the stable layer is weakened as the stratification is increased. However, mean zonal flow component penetrates the layer much deeply than the non-zonal component. This tendency can be explained by the analytical expression of penetration thickness obtained by Takehiro and Lister (2001). The results suggest that if the surface zonal flow of Jovian atmosphere is driven by the deep columnar convection, there are two possibilities : the underlying large scale columnar convection can penetrate the stratified layer and drives surface zonal flow directly; otherwise, the smaller scale columnar convection cannot penetrate the layer directly, but drives a large scale deep zonal flow, which is able to communicate through the stratified layer.
日本流体力学会の論文
2001-07-31