Articles | Volume 12, issue 1
Ann. Geophys., 12, 1–18, 1994
https://doi.org/10.1007/s00585-994-0001-z
Ann. Geophys., 12, 1–18, 1994
https://doi.org/10.1007/s00585-994-0001-z

  31 Jan 1994

31 Jan 1994

Jupiter's Great Red Spot: compactness condition and stability

Jun-Ichi Yano and Glenn R. Flierl Jun-Ichi Yano and Glenn R. Flierl

Abstract. Linear Rossby wave dispersion relationships suggest that Jupiter's Great Red Spot (GRS) is a baroclinic structure embedded in a barotropic shearing zonal flow. Quasi-geostrophic (QG) two-layer simulations support the theory, as long as an infinitely deep zonal flow is assumed. However, once a finite depth of the lower layer is assumed, a self-interaction of the baroclinic eddy component produces a barotropic radiating field, so that the GRS-like eddy can no longer remain compact. Compactness is recovered by explicitly introducing a deep dynamics of the interior for the lower layer, instead of the shallow QG formulation. An implication of the result is a strong coupling of the GRS to a convectively active interior.