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Korean Meteorological Society (한국기상학회)
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Long-Term Trend of Surface Wind Speed in Korea: Physical and Statistical Homogenizations

한반도 지상 풍속의 장기 추세 추정: 관측 자료의 물리적 및 통계적 보정

  • Choi, Yeong-Ju (School of Earth and Environmental Sciences, Seoul National University) ;
  • Park, Chang-Hyun (School of Earth and Environmental Sciences, Seoul National University) ;
  • Son, Seok-Woo (School of Earth and Environmental Sciences, Seoul National University) ;
  • Kim, Hye-Jin (School of Earth and Environmental Sciences, Seoul National University)
  • 최영주 (서울대학교 지구환경과학부) ;
  • 박창현 (서울대학교 지구환경과학부) ;
  • 손석우 (서울대학교 지구환경과학부) ;
  • 김혜진 (서울대학교 지구환경과학부)
  • Received : 2021.08.17
  • Accepted : 2021.11.05
  • Published : 2021.12.31
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Abstract

The long-term trend of surface wind speed in Korea is estimated by correcting wind measurements at 29 KMA weather stations from 1985 to 2019 with physical and statistical homogenization. The anemometer height changes at each station are first adjusted by applying physical homogenization using the power-law wind profile. The statistical homogenization is then applied to the adjusted data. A standard normal homogeneity test (SNHT) is particularly utilized. Approximately 40% of inhomogeneities detected by the SNHT match with the sea-level-height change of each station, indicating that an SNHT is an effective technique for reconciling data inhomogeneity. The long-term trends are compared with homogenized data. Statistically significant negative trends are observed along the coast, while insignificant trends are dominant inland. The mean trend, averaged over all stations, is -0.03 ± 0.07 m s-1 decade-1. This insignificant trend is due to a trend change across 2001. A decreasing trend of -0.10 m s-1 decade-1 reverses to an increasing trend of 0.03 m s-1 decade-1 from 2001. This trend change is consistent with mid-latitude wind change in the Northern hemisphere, indicating that the long-term trend of surface wind speed in Korea is partly determined by large-scale atmospheric circulation.

Keywords

Acknowledgement

본 논문의 개선을 위해 좋은 의견을 제시해 주신 두 분의 심사위원께 감사를 드립니다. 이 연구는 2021년 해양수산부 재원으로 해양수산과학기술진흥원(과학기술기반 해역이용영향평가 기술개발, 20210427)의 지원을 받아 수행하였습니다.

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