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전지구 격자형 CHIRPS 위성 강우자료의 한반도 적용성 분석

Assessment and Validation of New Global Grid-based CHIRPS Satellite Rainfall Products over Korea

문영식|김한중|남원호|전민기
한국농공학회 (The Korean Society Of Agricultural Engineers)|2020.03|한국농공학회논문집 (Journal of the Korean Society of Agricultural Engineers)|제62권 제2호|pp. 39-52|DOI https://doi.org/10.5389/KSAE.2020.62.2.039

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North Koreavalidationremote sensingSatellite rainfallCHIRPSprecipitation
주제분류농학

초록

A high quality, long-term, high-resolution precipitation dataset is an essential in climate analyses and global water cycles. Rainfall data from stationobservations are inadequate over many parts of the world, especially North Korea, due to non-existent observation networks, or limited reporting ofgauge observations. As a result, satellite-based rainfall estimates have been used as an alternative as a supplement to station observations. The ClimateHazards Group Infrared Precipitation (CHIRP) and CHIRP combined with station observations (CHIRPS) are recently produced satellite-based rainfallproducts with relatively high spatial and temporal resolutions and global coverage. CHIRPS is a global precipitation product and is made availableat daily to seasonal time scales with a spatial resolution of 0.05° and a 1981 to near real-time period of record. In this study, we analyze theapplicability of CHIRPS data on the Korean Peninsula by supplementing the lack of precipitation data of North Korea. We compared the dailyprecipitation estimates from CHIRPS with 81 rain gauges across Korea using several statistical metrics in the long-term period of 1981-2017. Tosummarize the results, the CHIRPS product for the Korean Peninsula was shown an acceptable performance when it is used for hydrologicalapplications based on monthly rainfall amounts. Overall, this study concludes that CHIRPS can be a valuable complement to gauge precipitation datafor estimating precipitation and climate, hydrological application, for example, drought monitoring in this region.

Abstract

A high quality, long-term, high-resolution precipitation dataset is an essential in climate analyses and global water cycles. Rainfall data from stationobservations are inadequate over many parts of the world, especially North Korea, due to non-existent observation networks, or limited reporting ofgauge observations. As a result, satellite-based rainfall estimates have been used as an alternative as a supplement to station observations. The ClimateHazards Group Infrared Precipitation (CHIRP) and CHIRP combined with station observations (CHIRPS) are recently produced satellite-based rainfallproducts with relatively high spatial and temporal resolutions and global coverage. CHIRPS is a global precipitation product and is made availableat daily to seasonal time scales with a spatial resolution of 0.05° and a 1981 to near real-time period of record. In this study, we analyze theapplicability of CHIRPS data on the Korean Peninsula by supplementing the lack of precipitation data of North Korea. We compared the dailyprecipitation estimates from CHIRPS with 81 rain gauges across Korea using several statistical metrics in the long-term period of 1981-2017. Tosummarize the results, the CHIRPS product for the Korean Peninsula was shown an acceptable performance when it is used for hydrologicalapplications based on monthly rainfall amounts. Overall, this study concludes that CHIRPS can be a valuable complement to gauge precipitation datafor estimating precipitation and climate, hydrological application, for example, drought monitoring in this region.

참고문헌 (45)

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