Abstract
본 연구는 2001년 1월, 2004년 3월, 2005년 12월 그리고 2010년 1월의 4개 폭설사상을 대상으로 3가지 적설심분포도를 구축하고 그 결과를 비교하고자 하였다. 첫째는 우리나라 76개의 지상기상관측소의 최심적설자료를 대상으로 IDW (Inverse Distance Weighting) 기법을 적용하여 구축한 경우(Snow Depth Map; SDM), 둘째는 SDM를 Terra MODIS (MODerate resolution Imaging Spectroradiometer) 영상에 의한 적설분포지역(Snow Cover Area; MODIS SCA)으로 추출한 경우(SDM+MODIS SCA; SDM_M), 셋째는 둘째 경우에 DEM (Digital Elevation Model)을 이용하여 고도에 따른 적설심 감률을 고려한 경우(SDM_M+DEM; SDM_MD)이다. 4개년도의 적설분포도를 작성한 결과, Terra MODIS 영상에 의한 적설분포면적은 남한면적(<TEX>$99,575.3km^2$</TEX>)의 62.9%, 44.1%, 52.0%, 69.0% 였다. 3가지 경우에 대한 평균 적설심을 비교한 결과, SDM보다 SDM_M이 각각 0.9cm, 1.9cm, 0.8cm, 1.5cm 작게, SDM_M보다 고도를 고려한 SDM_MD는 1.3cm, 0.9cm, 0.4cm, 1.2cm 크게 나타났다. This study is to make snowfall distribution map for the 4 heavy snowfall events of January 2001, March of 2004, December of 2005 and January of 2010, and compare the results for three cases of construction methods. The cases are to generate the map by applying IDW(Inverse Distance Weighting) interpolation to 76 ground measured snowfall point data (Snow Depth Map; SDM), mask out the SDM with the MODIS snow cover area (MODIS SCA) of Terra MODIS (MODerate resolution Imaging Spectroradiometer) (SDM+MODIS SCA; SDM_M), and consider the snowdepth lapse rate of snowfall by elevation (Digital Elevation Model; DEM) to the second case (SDM_M+DEM; SDM_MD). By applying the MODIS SCA, the SCA of 4 events was 62.9%, 44.1%, 52.0%, and 69.0% for the area of South Korea. For the average snow depth, the SDM_M decreased 0.9cm, 1.9cm, 0.8cm, and 1.5cm compared to SDM and the SDM_MD increased 1.3cm, 0.9cm, 0.4cm, and 1.2cm respectively.
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More From: Journal of the Korean Association of Geographic Information Studies
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