Microphysical and Large-Scale Dependencies of Temporal Rainfall Variability over a Tropical Ocean
| Autor: | Konstantine P. Georgakakos, Dimitris Tsintikidis |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Journal of the Atmospheric Sciences. 56:724-748 |
| ISSN: | 1520-0469 0022-4928 |
| DOI: | 10.1175/1520-0469(1999)056<0724:malsdo>2.0.co;2 |
| Popis: | The focus of this paper is the elucidation of the physical origins of the observed extreme rainfall variability over tropical oceans. A simple statistical–dynamical model, suitable for use in repetitive Monte Carlo experiments, is formulated as a diagnostic tool for this purpose. The model is based on three partial differential equations that describe airmass, water substance, and vertical momentum conservation in a column of air extending from the ocean surface to the top of the storm clouds. Tropospheric conditions are specified for the model state variables (such as updraft–downdraft velocity, precipitation water and cloud content, or saturation vapor deficit) in accordance with past observations in oceanic convection, to allow for vertical integration of the model equations and the formulation of a computationally efficient diagnostic tool. Large-scale forcing is represented by stochastic processes with temporal structure and parameters estimated from observed large-scale data. This model for... |
| Databáze: | OpenAIRE |
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