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RISS 인기검색어
- 검색키워드
- 저자 : NUCCIARONE,J.J. (검색결과 1 건)
- 무료
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PRABHAKARA,C.,NUCCIARONE,J.J.,CADEDDU,MARIA,ARKING,ALBERT,YOO,JUNG-MOON,DALU,G.,MALONEY,STEVEN P. 이화여자대학교 환경문제연구소 1997 이화환경연구 Vol.1 No.-
Using Microwave Sounding Unit(MSU) channel 2 (ch.2, 53.74GHz) data, Spencer and Christy (1992a) determined that the earth exhibits no temperature trend in the period 1979-90, while other author find a temperature increase of roughly 0.1 K. Based on a theoretical analysis Prabhakara et al.(1995) showed that the information about the global atmospheric temperature deduced from MSU Ch2 observations has a small contamination, δT₂as a result of the attenuation due to hydrometeors in the atmosphere. A method is developed in this study, that utilized coincident measurements made by MSU in Ch1(50.3GHz), to estimate this δT₂over the global oceans. The magnitude ofδT₂is found to be about 1K over significant parts of the tropical oceanic rain belts and about 0.25K over minor portions of the mid-latitude oceanic storm tracks. Due to events such as ElNioo, there is variability from year to year in the rain areas and rain intensity leading to significant change in the patterns of δT₂. The patterns of δT₂derived for March 82 and March 83 reveal such a change. When averaged over the global oceans, from 50˚N to 50˚S, δT₂has a value of 0.25 and 0.29K for March 1982 and 1983, respectively. Due to these reasons the interannual temperature change derived by Spencer and Christy from MSU Ch.2 will contain a residual hydrometeor effect. Thus in evaluating decadal trend of the global mean temperature of the order of 0.1 K form MSU Ch2. data one has to take into account completely the contamination due to hydrometeors.
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