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Park, Myung-Sook
School of Urban and Environmental Engineering
Research Interests
  • Improvement of our fundamental understanding of cloud physical process and latent heating and cooling rates in tropical cyclones and other synoptic- to large-scale circulations.
  • To evaluate model simulated cloud process with ground-truth assuming field-experiment observations and to improve the cloud parameterization process of models of all scales.
  • Mechanisms responsible for a genesis and decay of tropical convective systems in association with large-scale environmental and surface thermodynamic variability.

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Regional cloud characteristics over the tropical northwestern pacific as revealed by Tropical Rainfall Measuring Mission (TRMM) precipitation radar and TRMM microwave imager

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Title
Regional cloud characteristics over the tropical northwestern pacific as revealed by Tropical Rainfall Measuring Mission (TRMM) precipitation radar and TRMM microwave imager
Author
Park, Myung-SookChoi, Yong-SangHo, Chang-HoiSui, Chung-HsiungPark, Seon KiAhn, Myoung-Hwan
Keywords
PASSIVE MICROWAVE; ICE-SCATTERING; LIGHTNING CHARACTERISTICS; PROFILING ALGORITHM; SYSTEMS; SUMMER; VARIABILITY; CONVECTION; SATELLITE; CHINA
Issue Date
2007-03
Publisher
AMER GEOPHYSICAL UNION
Citation
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, v.112, no.D5, pp.D05209 -
Abstract
The present study investigates regional cloud characteristics over the tropical northwestern Pacific using Tropical Rainfall Measuring Mission (TRMM) data sets such as rain rate, radar reflectivity, and passive microwave radiometer polarization corrected temperature (PCT). In particular, the tropical northwestern Pacific is divided into two surface rain maxima regions: the South China Sea (SCS) and the Philippine Sea (PS). The TRMM variables are retrieved by a pair of spaceborne microwave sensors, Precipitation Radar (PR) and TRMM Microwave Imager (TMI). It is revealed that the SCS contains more frequent deeply developed convective systems relative to the PS on the basis of the analysis of the PR and TMI version-6 data during a 4-year period (1998-2001) of summers. This is mainly indicated by two factors: strong PR reflectivity (>= 30 dBZ) above the freezing level (similar to 5 km) and TMI ice-scattering signature (PCT at 85.5 GHz <=similar to 190 K, and PCT at 37.0 GHz <=similar to 260 K), which are more frequent over the SCS than over the PS. Comparison of TMI and PR rain rates, a relatively small (large) positive PR-TMI bias is observed for an average of rainy areas over the SCS (PS). This region-dependent PR-TMI bias can arise from the regionally different extents of both (1) the PR's underestimate by attenuation correction and (2) the TMI's overestimate by emission from the melting layer (i.e., SCS > PS in (1) and (2)). These differences are due to the excess of heavy rainfall events, high rain rates, strong convective intensities, and high cloud top heights in the SCS compared with the PS
URI
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DOI
10.1029/2006JD007437
ISSN
2169-897X
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UEE_Journal Papers
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