On the role of viscosity in ideal Hadley circulation models
Article first published online: 19 AUG 2010
Copyright 2010 by the American Geophysical Union.
Geophysical Research Letters
Volume 37, Issue 16, August 2010
How to Cite
2010), On the role of viscosity in ideal Hadley circulation models, Geophys. Res. Lett., 37, L16801, doi:10.1029/2010GL043745., and (
- Issue published online: 19 AUG 2010
- Article first published online: 19 AUG 2010
- Manuscript Accepted: 17 JUN 2010
- Manuscript Revised: 13 JUN 2010
- Manuscript Received: 14 MAY 2010
- Hadley circulation
 A comparison is made between inviscid and viscous solutions of an axially symmetric nonlinear Shallow Water Model (SWM) of the Hadley circulation on the spherical rotating Earth that includes vertical advection of momentum and Rayleigh friction. The results of the 1D SWM are compared with those of 2D (latitude-height) nonlinear axially symmetric models. It is shown that solutions obtained from inviscid models do not predict correctly the main features of the circulation outside the Tropics. Specifically, the latitudes of the subtropical jets depend strongly on viscosity and on the pole-to-equator temperature difference. The differences from inviscid theory are attributed to the increased rate of energy dissipation in the viscous atmosphere. At the Tropics, however, the inviscid solutions of the SWM predict well the latitude and strength of the easterly jet and the weak temperature gradient.