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| Schneider, E.K.; Kirtman, B.P.; Wu, Z.. |
| The low frequency sea surface temperature (SST) variability in the North Atlantic is studied using the Center for Ocean-Land-Atmosphere Studies (COLA) anomaly coupled general circulation model. The main focus is placed on the relative roles of stable and unstable coupled feedbacks in inducing the low frequency SST variability in various regions of the North Atlantic. To examine this question, a recently developed coupling technique, interactive ensembles, is applied to reduce the strength of “weather noise” in the model and isolate the atmospheric feedback to boundary forcing. |
| Tipo: Journal Contribution |
Palavras-chave: Sea surface temperature. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/508 |
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| Wu, Z.. |
| In this paper, the circulations driven by deep heating and shallow heating are investigated through analytically solving a set of linear equations and examining circulations simulated by a dry primitive equation model. Special emphasis is placed on the low-level mass (moisture) convergence associated with the forced circulation and the maintenance of the shallow and deep heat sources. It is found that the forced circulation driven by shallow heating is more likely to be trapped horizontally near the heating area but relatively extended in the vertical. As a consequence, diabatic heating can not balance adiabatic cooling due to upward motion. At the levels slightly above the top of the heating, a negative vertical gradient of temperature perturbation... |
| Tipo: Journal Contribution |
Palavras-chave: Atmospheric circulation. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/502 |
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