Characterizing ice-scattering homogeneity in trmm microwave imagers and its influence on oceanic rain-rate estimation bias of trmm precipitation radar

Sekaranom, Andung Bayu and Nurjani, Emilya and Wibowo, Sandy Budi and Masunaga, Hirohiko (2021) Characterizing ice-scattering homogeneity in trmm microwave imagers and its influence on oceanic rain-rate estimation bias of trmm precipitation radar. Atmosphere, 12 (11). ISSN 20734433

Full text not available from this repository. (Request a copy)

Abstract

Precipitation homogeneity is one of the main factors that contribute to the difference in the rain-rate estimation from meteorological satellites. Using the Tropical Rainfall Measuring Mission (TRMM) products, this paper aims to characterize the homogeneity of ice-scattering signals from TRMM Microwave Imagers (TMIs) as related to rain-rate estimation bias with TRMM Precipitation Radar (PR). Statistical information about the polarization-corrected brightness temperature (PCT) from the TMI 85 GHz band is obtained over the global ocean in the tropics. The characteristics are the fraction of PCT below a given threshold, the minimum value, and the standard deviation that are calculated at a 0.25◦ × 0.25◦ grid level. The average values of rain-rate estimation from TRMM PR and TMI in the same grid position and time are then compared. This result indicates that the rain-rate estimation bias is influenced by the homogeneity and organization of precipitation systems. Using the statistical signature of ice-scattering signals at the grid level, an adjustment was implemented for TMI rain-rate estimation. The results could produce rain-rate estimations that conform more to PR, particularly for the inhomogeneous precipitation system mostly affected by stratiform rain. The characterization of ice-scattering signals as a proxy to the precipitation homogeneity, as presented in this research, could be implemented in order to improve the accuracy of satellite rain-rate estimation in the future. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Item Type: Article
Additional Information: Cited by: 1; All Open Access, Gold Open Access
Uncontrolled Keywords: Satellites; Ice; Radar measurement; Rain; Space-based radar; Tropics; Brightness temperatures; Estimation bias; Grid levels; Microwave imagers; Precipitation homogeneity; Precipitation radar; Rain-rate estimation; Scattering signals; Tropical rainfall measuring mission precipitation radars; Tropical rainfall measuring missions; estimation method; ice; inhomogeneity; marine atmosphere; microwave imagery; precipitation intensity; radar; scattering; TRMM; Rain gages
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: Faculty of Geography > Departemen Geografi Lingkungan
Depositing User: Sri JUNANDI
Date Deposited: 04 Oct 2024 21:55
Last Modified: 04 Oct 2024 21:55
URI: https://ir.lib.ugm.ac.id/id/eprint/3934

Actions (login required)

View Item
View Item