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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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| Marx, L.. |
| A new method of computing the saturation specific humidity, qs, and saturation vapor pressure, es, is presented. This has been recently implemented in the Center for Ocean-Land- Atmosphere Studies (COLA) atmospheric general circulation model (AGCM). The new method offers high accuracy extending beyond the observed atmospheric temperature domain and yet is computationally competitive with most other methods used for this calculation. In addition a corresponding continuous function for the derivative of es with respect to temperature is also given. An inverse function to es is available as well. Included are small corrections to es to assure high accuracy. The design of the implementation permits the user to obtain whatever level of accuracy and detail might... |
| Tipo: Working Paper |
Palavras-chave: Atmospheric circulation. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/504 |
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| Nieto, J.J.. |
| There were elaborated multiple linear regression models to determine the adjustment degree of niño 1+2 and Madden-Julian Oscillation indexes with the accumulated precipitation in Guayaquil, for january, february, march, and april. The correlation models were built separately for each month with time series from 1978 to 2004 of monthly accumulated precipitation, niño 1+2 anomaly, and Madden-Julian Oscillation index for 120W, with a significance level of 95%. It was found that for january, march, and april the linear correlation adjust with coefficients R2 of 0.80, 0.77, and 0.82 respectively. The precipitation levels for february does not showed significant correlation with the indexes, it seems to respond to other factors, presumably atmospheric. There... |
| Tipo: Journal Contribution |
Palavras-chave: Mathematical analysis; Atmospheric precipitations; Atmospheric circulation; Seasonal variations; Surface temperature; Atmospheric circulation; Http://aims.fao.org/aos/agrovoc/c_29546. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/2380 |
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