Title

Spatial variability of surface rainfall as observed from TRMM field campaign data

Authors

Authors

S. Datta; W. L. Jones; B. Roy;A. Tokay

Abbreviated Journal Title

J. Appl. Meteorol.

Keywords

RADAR; VALIDATION; Meteorology & Atmospheric Sciences

Abstract

The spatial variability of surface rainfall over 5- and 30-day time periods is observed, and it is found that the spatial decorrelation length of precipitation is comparable to the size of a single surface gauge network. The observed variability is found to affect radar-derived precipitation estimation, particularly if it is based on calibration using rain gauges. The radar subgrid-scale variability is also observed using some redundant and finer-scale gauge networks deployed during the Tropical Rainfall Measuring Mission ( TRMM) ground-validation field campaigns. Based upon statistical analysis and a point-based decision-making system, a best-suited spatial temporal filtering technique is suggested and, when applied to match radar data with any other surface observation, is found to reduce bias.

Journal Title

Journal of Applied Meteorology

Volume

42

Issue/Number

5

Publication Date

1-1-2003

Document Type

Article

Language

English

First Page

598

Last Page

610

WOS Identifier

WOS:000182452200004

ISSN

0894-8763

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