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An intercomparison of GMS image data and observed rainfall data

GMS 영상자료와 관측강수량 자료의 비교

  • 서애숙 (기상청 기상연구소 원격탐사연구실) ;
  • 이미선 (기상청 기상연구소 원격탐사연구실) ;
  • 김금란 (기상청 기상연구소 원격탐사연구실) ;
  • 이희훈 (기상청 기상연구소 원격탐사연구실)
  • Published : 1994.06.01

Abstract

The purpose of this study is to find the relationship between GMS image data and hourly observed rainfalls data. Heavy rainfall cases over South Korea on 10th September 1990 and on 29th July 1993 were selected for studying of the relationship between the image data and reinfalls. First, image data were converted to TBB(Temperature of Black Body) and albedo and then these values were extracted for the pixels closest to the surface observation station to correlate with the rainfall data. Horizontal distribution of TBB and albedo tells roughly rainfall regions. The correlation between rainfall and TBB is found to be very low in quantitative analysis. The weak relationship between the brighter albedo and the higher rainfall probability is observed. This study suggests that the TBB values are useful in classifying rain areas and for heavy rainfalls the albedo values are more useful than the TBB. Low linear correlation between the fields may be attributed to the neglect of cloud types in this study.

Keywords

References

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