Journal of the Korean earth science society (한국지구과학회지)

The Korean Earth Science Society (한국지구과학회)
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Temporal and Spatial Variability of the TOMS Total Ozone; Global Trends and Profiles

TOMS 오존전량의 시공간 변동; 전구적인 추세 및 연직 분포

  • Yoo Jung-Moon (Department of Science Education, Ewha Womans University) ;
  • Jeong Eun-Joo (Department of Science Education, Ewha Womans University)
  • 유정문 (이화여자대학교 과학교육과) ;
  • 정은주 (이화여자대학교 과학교육과)
  • Published : 2005.04.01
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Abstract

Using monthly total ozone data obtained from a Total Ozone Mapping Spectrometer (TOMS) onboard the Nimbus-7 and Earth Probe satellite, this study examined the trend in the total amount of global ozone during two periods: from 1979-1992 [Early period] and 1997-2002 [Latter period]. The Annual average of total ozone during the Early period was globally reduced by about 10 DU compared to the amount during the Latter, except in some areas between the equator and 20 N. Global trends of total ozone showed a decrease of -6.30 DU/decade during 1979-1992, and an increase of 0.12 DU/decade during 1997-2002. Its enhancement during the Latter period was especially noticeable in tropical areas. The EOF analyses of total ozone from this period indicated signs of temporal/spatial variability, associated with the phenomena of Quasi-Biennial Oscillation (QBO), Quasi-Triennial Oscillation (QTO), El Nino Southern Oscillation (ENSO), and volcanic eruption. Seasonal profiles of tropospheric ozone in the tropics obtained from ozonesondes, showed the spatial pattern of zonal wavenumber one. Overall, this study may be useful in analyzing possible causes in the variations of statospheric and tropospheric ozone.

TOMS 월별 오존전량의 전구 자료를 이용하여, 두 기간(전기: 1979-1992년, 후기: 1997-2002년)에 대한 오존전량 추세 및 시공간 변동을 지역과 해륙 분포에 따라 상호 비교하였다. 전기에 비하여 후기의 오존전량이 0-20 N 일부 지역을 제외하고 전지구적으로 10 DU 정도 감소하였다. 오존전량의 추세는 전구적으로 전자기간에 감소(-6.30 DU/decade)를 나타냈다. 후자 기간의 오존 증가 경향은 열대 지역에서 현저하였다. 1997-2002년 기간의 오존전량에 대한 경험직교함수 분석은 준2년 진동(QBO), 준3년 진동(QTO), 엘니뇨(ENSO), 그리고 화산폭발과 관련된 시공간 변동을 반영하였다. 열대 지역에서 대류권 오존의 연직 분포는 동서방향에서 파수 1의 형태를 보였다. 본 연구는 기후 및 환경변화와 관련된 성층권과 대류권 오존 변화의 원인 규명에 도움을 줄 수 있다.

Keywords

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