대한원격탐사학회지 (Korean Journal of Remote Sensing)

  • 제14권4호
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  • Pages.315-324
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  • 1998
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  • 1225-6161(pISSN)
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  • 2287-9307(eISSN)
대한원격탐사학회 (Korean Society of Remote Sensing)
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TOVS 자료로 도출한 태풍(WALT(9407)과 FAYE(9503))에 동반된 총가강수량장

Total Precipitable Water Fields of Typhoons WALT(9407) & FAYE(9503) Derived from TOVS and SSM/I

  • 정효상 (기상청, 기상연구소 원격탐사연구실)
  • 발행 : 1998.12.01
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초록

TOVS에 탑재된 마이크로파 센서(MSU)와 고감도 적외복사계(HIRS)로부터 도출한 총가강수량과 SSM/I 관측으로 계산한 총가강수량으로 일본에 상륙 후, 한일해협에서 열대성 저기압으로 약화된 태풍 월트(9407)와 1995년 처음 태풍으로 발달한 태풍 페이(9503)의 운동기간 중의 수증기장 변화를 조사하는데 사용하였는데, 이들로 태풍의 운동변화에 따른 수증기장 변화를 나타낼 수 있었다. 태풍 월트와 페이의 전가강수량장은 주로 한국과 일본을 향하여 다가옴에 따라, 그들의 강도를 유지하고 강화하는데 아주 중요한 역할을 하는 북서태평양 상에 수증기의 수평수송에 주로 좌우된다. 도출된 수증기장은 두 주요구름대가 월트와 페이가 다가오고 지나가는 동안 한반도와 일본상공의 강우대 임을 나타내는 두터운 대류운 형태와 유사함을 보였다. 그러나 도출된 TOVS 전가강수량의 값은 SSM/I 값과 비교할 때 상대적으로 과소평가되었음을 나타내었다.

The total precipitable water fields derived from HIRS(High Resolution Infrared Radiometer Sounder)and MSU(Microwave Sounding Unit) measurements of TOVS and brightness temperature of SSM/I were used to investigate the evolution of moisture fields for the Typhoon WALT(9407) which after landing in Japan it became tropical depression in Korea-Japan Strait, and FAYE(9503) which was the first tropical storm of 1995 to became a typhoon, respectively. The total precipitable water derived from TOVS observations is delineated according to the evolutions of WALT and FAYE movements because total precipitable water fields of TY WALT(9407) and FAYE9\(9503) were largely controlled by horizontal transport of water vapor over the Northwest Pacific Ocean which dominantly plays an important role in maintaining and accelerating their intensities toward Korea and Japan . These fields demonstrated that two major bands, which imply the rain bands, were locally well-organized and similar to the thick convective cloud features over Japan and the Korean peninsula while WALT and FAYE were approaching away and to. But the values of derived TOVS total precipitable water have shown the underestimate of those of SSM/I total comparatively for two typhoons.

키워드

참고문헌

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