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Korean Meteorological Society (한국기상학회)
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Retrieval of Thermal Tropopause Height using Temperature Profile Derived from AMSU-A of Aqua Satellite and its Application

Aqua 위성 AMSU-A 고도별 온도자료를 이용한 열적 대류권계면 고도 산출 및 활용

  • Cho, Young-Jun (Forecast Research Laboratory, National Institute of Meteorological Research, KMA) ;
  • Shin, Dong-Bin (Dept. of Atmospheric Sciences, Yonsei University) ;
  • Kwon, Tae-Yong (Dept. of Atmospheric and Environmental Sciences, Gangneung-Wonju National University) ;
  • Ha, Jong-Chul (Forecast Research Laboratory, National Institute of Meteorological Research, KMA) ;
  • Cho, Chun-Ho (Forecast Research Laboratory, National Institute of Meteorological Research, KMA)
  • 조영준 (국립기상연구소 예보연구과) ;
  • 신동빈 (연세대학교 대기과학과) ;
  • 권태영 (강릉원주대학교 대기환경과학과) ;
  • 하종철 (국립기상연구소 예보연구과) ;
  • 조천호 (국립기상연구소 예보연구과)
  • Received : 2014.11.05
  • Accepted : 2014.12.11
  • Published : 2014.12.31
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Abstract

In this study, thermal tropopause height defined from WMO (World Meteorological Organization) using temperature profile derived from Advance Microwave Sounding Unit-A (AMSU-A; hereafter named AMSU) onboard EOS (Earth Observing System) Aqua satellite is retrieved. The temperature profile of AMSU was validated by comparison with the radiosonde data observed at Osan weather station. The validation in the upper atmosphere from 500 to 100 hPa pressure level showed that correlation coefficients were in the range of 0.85~0.97 and the bias was less than 1 K with Root Mean Square Error (RMSE) of ~3 K. Thermal tropopause height was retrieved by using AMSU temperature profile. The bias and RMSE were found to be -5~ -37 hPa and 45~67 hPa, respectively. Correlation coefficients were in the range of 0.5 to 0.7. We also analyzed the change of tropopause height and temperature in middle troposphere in the extreme heavy rain event (23 October, 2003) associated with tropopause folding. As a result, the distinct descent of tropopause height and temperature decrease of ~8 K at 500 hPa altitude were observed at the hour that maximum precipitation and maximum wind speed occurred. These results were consistent with ERA (ECMWF Reanalysis)-Interim data (potential vorticity, temperature) in time and space.

Keywords

References

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