In this study, we produced satellite-based drought indices such as NDVI(normalized difference
vegetation index), NDWI(normalized difference water index), and NDDI(normalized difference drought index) and extracted time-series principal components from the drought indices using EOF(empirical orthogonal function) method to examine their relationships with climatic variables. We found that the first principal components of the drought indices for Sonid Right Banner, Inner Mongolia were dominant in cold seasons and were closely related to low temperature, little rainfall, and high surface albedo. The satellite-based drought indices and their EOF analyses can be utilized for the studies of cold-season drought and warm-season drought as well.

• 김광진(부경대학교 공간정보시스템공학과) | Kwang-Jin Kim
• 김대선(부경대학교 공간정보시스템공학과) | Dae-Sun Kim
• 조재일(부경대학교 공간정보시스템공학과) | Jaeil Cho
• 홍성욱(국가기상위성센터 위성분석과) | Sung-Wook Hong
• 이양원(부경대학교 공간정보시스템공학과) | Yang-Won Lee Correspondence