Evaporative Stress Index (ESI)를 활용한 북한의 위성영상기반 농업가뭄 평가

초록

North Korea has frequently suffered from extreme agricultural crop droughts, which have led to food shortages, according to the Food and AgricultureOrganization (FAO). The increasing frequency of extreme droughts, due to global warming and climate change, has increased the importance ofenhancing the national capacity for drought management. Historically, a meteorological drought index based on data collected from weather stations hasbeen widely used. But it has limitations in terms of the distribution of weather stations and the spatial pattern of drought impacts. Satellite-based datacan be obtained with the same accuracy and at regular intervals, and is useful for long-term change analysis and environmental monitoring and widearea access in time and space. The Evaporative Stress Index (ESI), a satellite-based drought index using the ratio of potential and actual evaporation,is being used to detect drought response as a index of the droughts occurring rapidly over short periods of time. It is more accurate and provides fasteranalysis of drought conditions compared to the Standardized Precipitation Index (SPI), and the Palmer Drought Severity Index (PDSI). In this study,we analyze drought events during 2015-2017 in North Korea using the ESI satellite-based drought index to determine drought response by comparingwith it with the SPI and SPEI drought indices.

키워드