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).
|Titolo:||The shape of convective rain cells|
|Data di pubblicazione:||2003|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1029/2003GL018539|
|Appare nelle tipologie:||1.1 Articolo in rivista|