The shape of convective rain cells

Details The shape of convective rain cells The shape of convective rain cells

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30xhls1v&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 24, pp. HLS 1-1, CiteID 2280, DOI 10.1029/2003GL018539

Mathematics

Logic

10

Hydrology: Stochastic Processes, Hydrology: Precipitation (3354), Meteorology And Atmospheric Dynamics: Convective Processes

Scientific paper

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.

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