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How TRMM precipitation radar and microwave imager retrieved rain rates differ
Author(s) -
Seo EunKyoung,
Sohn ByungJu,
Liu Guosheng
Publication year - 2007
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2007gl032331
Subject(s) - radar , precipitation , environmental science , radiometer , microwave radiometer , brightness temperature , meteorology , rain rate , atmospheric sciences , remote sensing , microwave , climatology , geology , geography , physics , telecommunications , quantum mechanics , computer science
Analysis of the collocated rain retrievals from Tropical Rainfall Measuring Mission's precipitation radar and microwave radiometer reveals that their difference depends on the intensity and the type of rain – the radiometer‐derived rain rates vary from higher to lower than the radar‐derived ones as rain rate or convective fraction increases. To better understand how this difference occurs, the relations between the two leading EOFs (Empirical Orthogonal Functions) of the observed brightness temperatures and the radiometer‐ or radar‐derived rain rates were examined for convective, mixed and non‐convective rain categories. In all types of rain, the two EOFs respond to the variation of the radiometer‐ and radar‐derived rain rates in a similar fashion in low rain rates, while they respond quite differently in high rain rates.