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2024 Vol.66, Issue 4 Preview Page
Quantifying the 2022 Extreme Drought Using Global Grid-Based Satellite Rainfall Products

전지구 강수관측위성 기반 격자형 강우자료를 활용한 2022년 국내 가뭄 분석

Young-Sik Muna
,
Won-Ho Namb†
,
Min-Gi Jeonc
,
Kwang-Ya Leed
,
Jong-Won Doe
,
Kisekka Isayaf
문 영식a
,
남 원호b†
,
전 민기c
,
이 광야d
,
도 종원e
,
Isaya Kisekkaf
aPh.D. Student, Department of Convergence of Information and Communication Engineering, Hankyong National University, Anseong, Republic of Korea
bAssociate Professor, School of Social Safety and Systems Engineering, Institute of Agricultural Environmental Science, National Agricultural Water Research Center, Hankyong National University, Anseong, Republic of Korea
cPh.D. Candidate, Department of Convergence of Information and Communication Engineering, Hankyong National University, Anseong, Republic of Korea
dResearch Professor, Institute of Agricultural Science, Chungnam National University, Republic of Korea
eDeputy Director, Rural Research Institute, Korea Rural Community Corporation, Ansan, Republic of Korea (Visiting Researcher, University of California, Davis)
fProfessor, Department of Land, Air and Water Resources, University of California, Davis, California, USA
a안성 한경대학교 정보통신공학과 박사과정 학생
b안성시 한경대학교 농업환경과학원 국립농업용수연구센터 사회안전시스템공학부 부교수
c안성 한경대학교 정보통신공학과 박사후보생
d충남대학교 농업과학연구원 연구교수
e한국농어촌공사 안산 부이사장 (캘리포니아 대학교 데이비스 방문연구원)
f미국 캘리포니아주 데이비스 캘리포니아대학교 토지대기수자원학과 교수
† Corresponding author Tel.: +82-10-8009-9900 E-mail: wonho.nam@hknu.ac.kr
2024. pp. 41-50
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Abstract

Precipitation is an important component of the hydrological cycle and a key input parameter for many applications in hydrology, climatology, meteorology, and weather forecasting research. Grid-based satellite rainfall products with wide spatial coverage and easy accessibility are well recognized as a supplement to ground-based observations for various hydrological applications. The error properties of satellite rainfall products vary as a function of rainfall intensity, climate region, altitude, and land surface conditions. Therefore, this study aims to evaluate the commonly used new global grid-based satellite rainfall product, Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS), using data collected at different spatial and temporal scales. Additionally, in this study, grid-based CHIRPS satellite precipitation data were used to evaluate the 2022 extreme drought. CHIRPS provides high-resolution precipitation data at 5 km and offers reliable global data through the correction of ground-based observations. A frequency analysis was performed to determine the precipitation deficit in 2022. As a result of comparing droughts in 2015, 2017, and 2022, it was found that May 2022 had a drought frequency of more than 500 years. The 1-month SPI in May 2022 indicated a severe drought with an average value of -1.8, while the 3-month SPI showed a moderate drought with an average value of 0.6. The extreme drought experienced in South Korea in 2022 was evident in the 1-month SPI. Both CHIRPS precipitation data and observations from weather stations depicted similar trends. Based on these results, it is concluded that CHIRPS can be used as fundamental data for drought evaluation and monitoring in unmeasured areas of precipitation.

Keywords
Satellite rainfall
CHIRPS
precipitation
drought index
Standardized Precipitation Index (SPI)
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Information
  • Publisher :The Korean Society of Agricultural Engineers
  • Publisher(Ko) :한국농공학회
  • Journal Title :Journal of Korean Society of Agricultural Engineers
  • Journal Title(Ko) :한국농공학회논문집
  • Volume : 66
  • No :4
  • Pages :41-50
  • Received Date : 2024-04-09
  • Revised Date : 2024-05-21
  • Accepted Date : 2024-05-28
  • DOI :https://doi.org/10.5389/KSAE.2024.66.4.041
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