• 한국대기환경학회지
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• 제30권2호
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• pp.139-149
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• 2014

A new technique, namely the combination of satellite and trajectory analysis (CSTA), for exploring the spatio-temporal distribution information of volcanic ash plume (VAP) from volcanic eruption. CSTA uses the satellite derived ash property data and a matching forward-trajectories, which can generate airmass history pattern for specific VAP. In detail, VAP properties such as ash mask, aerosol optical thickness at 11 ${\mu}m$ ($AOT_{11}$), ash layer height, and effective radius from the Moderate Resolution Imaging Spectro-radiometer (MODIS) satellite were retrieved, and used to estimate the possibility of the ash forecasting in local atmosphere near volcano. The use of CSTA for Iceland's Eyjafjallaj$\ddot{o}$kull volcano erupted in May 2010 reveals remarkable spatial coherence for some VAP source-transport pattern. The CSTA forecasted points of VAP are consistent with the area of MODIS retrieved VAP. The success rate of the 24 hour VAP forecast result was about 77.8% in this study. Finally, the use of CSTA could provide promising results for VAP monitoring and forecasting by satellite observation data and verification with long term measurement dataset.

• 대한원격탐사학회지
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• 제30권2호
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• pp.303-314
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• 2014

일본 가고시마에 위치하고 있는 사쿠라지마 화산은 세계에서 가장 활발하게 활동하고 있는 화산 중 하나이다. 2013년 8월 18일 사쿠라지마 화산은 최근 들어 가장 큰 규모의 분화를 하였고, 분화에 의해 발생한 화산재는 일본뿐만 아니라 국내 유입에 대한 우려를 야기하였다. 본 연구에서는 사쿠라지마 화산분출물이 한반도에 미치는 영향을 분석하기 위하여 수치실험을 수행하였다. 화산재 확산 경로를 예측하기 위하여 HYSPLIT 확산모델과 UM 기상자료를 이용하였으며, 연구대상일은 화산재 유입이 예상되는 규모로 분화한 2013년 9월 17일이다. 또한 천리안 위성영상을 이용하여 화산재를 탐지하였고, 모의실험 결과와 비교를 통해 검증을 수행하였다. 그 결과, HYSPLIT 모델기반의 화산재 확산 예측 경로와 GOCI 위성 영상에서 탐지한 화산재 분포지역과 63.52%가 일치하는 것을 보였다.

• Asian Journal of Atmospheric Environment
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• 제4권2호
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• pp.72-79
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• 2010

In this study, the ionic composition of volcanogenically derived particles and their temporal and spatial distributions have been investigated to evaluate the impact of the volcanic eruption on the local ecosystem and residents. To this end, an intensive field study was conducted to measure the size-segregated particulate matters at the east part of Sakurajima in Japan. Fractionated sampling of particles into > $PM_{10}$, $PM_{10-2.5}$, and $PM_{2.5}$ was made by a multi nozzle cascade impactor (MCI). The concentration of various ions present in the size-resolved particles was determined by Ion chromatography. The time dependent 3-dimensional Volcanic Ash Forecast Transport And Dispersion (VAFTAD) model developed by the NOAA Air Resources Laboratory (ARL) indicated that the sampling site of this work was affected by the volcanic aerosol particles plume. The temporal distributions of sulfate and $PM_{2.5}$ during the field campaign were significantly variable with important contributions to particle mass concentration. The chlorine loss, suspected to be caused by acidic components of volcanic gases, occurred predominantly in fine particles smaller than $10\;{\mu}m$.