Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Retrieval of Depolarization ratio using Sunphotometer data and Comparison with LIDAR Depolarization ratio

대기 에어로졸 고도 분포와 선포토미터 편광소멸도와의 연관성 연구

  • Lee, Kyunghwa (School of Environmental Science and Engineering, Gwangju Institute of Science and Technology) ;
  • Kim, Kwanchul (International Environmental Research Center, Gwangju Institute of Science and Technology) ;
  • Noh, Youngmin (School of Environmental Science and Engineering, Gwangju Institute of Science and Technology)
  • 이경화 (광주과학기술원 환경공학부) ;
  • 김관철 (광주과학기술원 국제환경연구소) ;
  • 노영민 (광주과학기술원 환경공학부)
  • Received : 2016.03.10
  • Accepted : 2016.04.15
  • Published : 2016.04.30
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Abstract

Particle depolarization ratios (DPRs) at 440, 675, 870 and 1020 nm are retrieved from AERONET sun/sky radiometer observations at Gosan and Kongju in South Korea. The retrieved results show good agreement with DPRs measured by lidar at 532 nm. High DPRs are found when Asian dust passes through at the upper atmosphere over 2 km above the Earth's surface. In case of lower atmosphere less than 2 km from the ground, DPRs are relatively low due to the small amount of dust particles and mixing of dust with air pollutants.

본 연구에서는 제주 고산과 공주에서 AERONET 선포토미터로 관측된 데이터를 분석하여 440, 675, 870, 1020 nm에서의 입자 편광소멸도를 산출하였다. 산출된 결과는 같은 지역에서 측정된 라이다 자료로부터 얻어진 532 nm에서의 입자 편광소멸도와 비교하여 높은 상관관계를 보였다. 선포토미터와 동 시간대에 라이다로 측정된 고도별 편광소멸도의 분석을 통하여 2 km 이상 상층으로 많은 양의 황사가 이동할 때 높은 편광소멸도를 보임을 확인하였다. 또한, 상대적으로 낮은 편광소멸도가 측정된 경우에도 대기 상층에서 황사가 많이 이동하는 경우를 확인하였다. 2 km 이하 하층의 경우에는 유입되는 황사가 적거나 오염 입자와의 혼합으로 상층에 비하여 낮은 편광소멸도를 보였다.

Keywords

References

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