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| Titel |
Temperature distribution and Hadley circulation in an axisymmetric model |
| VerfasserIn |
N. Tartaglione |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2198-5634
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics Discussions ; 1, no. 2 ; Nr. 1, no. 2 (2014-11-03), S.1621-1655 |
| Datensatznummer |
250115128
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| Publikation (Nr.) |
 copernicus.org/npgd-1-1621-2014.pdf |
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| Zusammenfassung |
| The impact of the temperature distribution on the Hadley circulation
simulated by an axisymmetric model is studied. The temperature distributions
that drive the model are modulated here by two parameters, n and k, the
former controlling the horizontal broadness and the latter defining change in
the vertical lapse rate. In the present study, the changes of the temperature
distribution mimic changes of the energy input of the atmospheric system
leaving as an invariant the equator-poles difference. Both equinoctial and
time-dependent Hadley circulations are simulated and results compared. The
results give evidence that concentrated temperature 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 temperature rather than
the vertical lapse rate k, which is important only when the temperature
distribution is concentrated at the equator. The jet stream position does not
show any dependence with n and k, except when the temperature
distribution is very wide and in such a case the jet is located at the
mid-latitude. Using n = 2 and k = 1 we have the formulation of
the potential temperature adopted in 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. |
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