The shape of rainfall cells is a crucial ingredient of stochastic point-process models that describe intense precipitation events. Here we study the shape of the individual rain cells measured during the TOGA/COARE and GATE radar experiments. We find that, on average, rainfall intensity decreases exponentially from the cell's center. An exponential profile provides a good estimate of the precipitation intensity in the bulk of the cell. By contrast, the standard assumption of a Gaussian shape leads to significant underestimation of the precipitation intensity in the central portion of the cell and of the associated hydrologic response.
The shape of convective rain cells / von Hardenberg, J; Ferraris, L; Provenzale, A. - In: GEOPHYSICAL RESEARCH LETTERS. - ISSN 0094-8276. - 30:24(2003). [10.1029/2003GL018539]
The shape of convective rain cells
von Hardenberg, J;
2003
Abstract
The shape of rainfall cells is a crucial ingredient of stochastic point-process models that describe intense precipitation events. Here we study the shape of the individual rain cells measured during the TOGA/COARE and GATE radar experiments. We find that, on average, rainfall intensity decreases exponentially from the cell's center. An exponential profile provides a good estimate of the precipitation intensity in the bulk of the cell. By contrast, the standard assumption of a Gaussian shape leads to significant underestimation of the precipitation intensity in the central portion of the cell and of the associated hydrologic response.File | Dimensione | Formato | |
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https://hdl.handle.net/11583/2814940