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자료유형
학술저널
저자정보
저널정보
한국기상학회 Asia-Pacific Journal of Atmospheric Sciences 한국기상학회지 제36권 제1호
발행연도
2000.2
수록면
75 - 86 (12page)

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초록· 키워드

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In order to analyze temporal and spatial variability of total ozone, and its correlation with thermal condition, the empirical orthogonal function (EOF) analysis has been performed on the monthly mean and its anomaly, derived from Nimbus 7/TOMS ozone data over the globe for the period of 1979-92. Temporal correlations between ozone and three thermal factors, for instances, the Microwave Sounding Unit (MSU) Ch2 (~600 hPa) and Ch4 (~70 hPa) brightness temperatures and sea surface temperature (SST) have been also investigated. Positive correlations between ozone and lower stratospheric temperature occur in most areas, implying that the ozone reduction is related with the stratospheric cooling. In particular, large positive values occur in the stratosphere of midlatitudes where large vertical planetary wave propagation has been known to take place. On the other hand, the ozone tends to negatively correlate with either SST or midtropospheric temperature over a wide area. Here upward displacement of tropopause induced by warmer tropospheric atmosphere leads to a decrease in total ozone. However, tropical regions north of the equator exceptionally show positive correlations which may be also affected by El Nino, volcanic eruption, other greenhouse gases and biomass burning, based on previous studies. In the EOF analysis of monthly mean ozone over the globe, the first mode shows maximum variability over the midlatitude in spring of each hemisphere. The first mode of ozone anomaly over the tropical Pacific indicates Quasi-Biennial Oscillation (QBO) in time series which has a spatial distribution symmetrical to the equator, and the ozone reduction around the equator caused by the volcanic eruption of Mt. Pinatubo in June 1991. The ozone variability in a period of 20 months is found in the third mode. The fourth mode appears in a dumbbell-shaped spatial pattern almost symmetrical to the equator during El Nino, and with two ozone minima in the tropical eastern Pacific, consistent with previous studies. However, the ozone over both the Korean peninsula and the equatorial western Pacific tends to increase during El Nino.

목차

Abstract
1. 서론
2. 자료 및 방법
3. 월평균 및 계절별 기후값
4. 오존과 대기 열적 상태와의 상관
5. 오존 전량의 경험직교함수 분석
6. 결론
감사
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