 |
| Titel |
Equilibrium temperature distribution and Hadley circulation in an axisymmetric model |
| VerfasserIn |
N. Tartaglione |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 22, no. 2 ; Nr. 22, no. 2 (2015-03-16), S.173-185 |
| Datensatznummer |
250120972
|
| Publikation (Nr.) |
 copernicus.org/npg-22-173-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| The impact of the equilibrium temperature distribution, θE,
on the Hadley circulation simulated by an axisymmetric model is studied. The
θE distributions that drive the model are modulated here by
two parameters, n and k, the former controlling the horizontal broadness
and the latter controlling the vertical stratification of
θE. In the present study, variations in the
θE distribution mimic changes in the energy input of the
atmospheric system, leaving as almost invariant the Equator–poles
θE difference. Both equinoctial and time-dependent Hadley
circulations are simulated and the results compared. The results give
evidence that concentrated θE distributions enhance the
meridional circulation and jet wind speed intensities, even with a lower
energy input. The meridional circulation and the subtropical jet stream
widths are controlled by the broadness of horizontal θE
rather than by the vertical stratification, which is important only when
θE distribution is concentrated at the Equator. The jet
stream position does not show any dependence with n and k, except when
the θE distribution is very wide (n = 3) and, in such
a case, the jet is located at the mid-latitudes and the model temperature
clamps to forcing θE. Using n = 2 and k = 1, we
have the formulation of the potential temperature adopted in the classical
literature. A comparison with other works is performed, and our results show
that the model running in different configurations (equinoctial, solstitial
and time dependent) yields results similar to one another. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|