Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Reference evapotranspiration estimates based on meteorological variables over Korean agro-climatic zones for rice field

남한지역의 논 농업기후지대에 대한 기상자료 기반의 기준 증발산량 추정

  • Jung, Myung-Pyo (Climate Change & Agroecology Division, National Institute of Agricultural Sciences) ;
  • Hur, Jina (Climate Change & Agroecology Division, National Institute of Agricultural Sciences) ;
  • Shim, Kyo-Moon (Climate Change & Agroecology Division, National Institute of Agricultural Sciences) ;
  • Kim, Yongseok (Climate Change & Agroecology Division, National Institute of Agricultural Sciences) ;
  • Kang, Kee-Kyung (Climate Change & Agroecology Division, National Institute of Agricultural Sciences) ;
  • Choi, Soon-Kun (Climate Change & Agroecology Division, National Institute of Agricultural Sciences) ;
  • Lee, Byeong-Tae (Climate Change & Agroecology Division, National Institute of Agricultural Sciences)
  • 정명표 (국립농업과학원 기후변화생태과) ;
  • 허지나 (국립농업과학원 기후변화생태과) ;
  • 심교문 (국립농업과학원 기후변화생태과) ;
  • 김용석 (국립농업과학원 기후변화생태과) ;
  • 강기경 (국립농업과학원 기후변화생태과) ;
  • 최순군 (국립농업과학원 기후변화생태과) ;
  • 이병태 (국립농업과학원 기후변화생태과)
  • Received : 2019.09.24
  • Accepted : 2019.12.20
  • Published : 2019.12.30
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Abstract

This study was conducted to estimate annual reference evapotranspiration (ET0) for the agro-climatic zones for rice paddy fields in South Korea between 1980 and 2015. The daily ET0 was estimated by applying the Penman-Monteith method to meteorological data from 61 weather stations provided by Korean Meteorological Administration (KMA). The average of annual ET0 from 1980 to 2015 was 1334.1±33.89 mm. The ET0 was the highest at the Southern Coastal Zone due to their higher air temperature and lower relative humidity. The ET0 had significantly increased with 2.81 mm/yr for the whole zones over 36 years. However, the change rate of it was different among agro-climatic zones. The annual ET0 highly increased in central zones and eastern coastal zones. In terms of correlation coefficient, the temporal change of the annual ET0 was closely related to variations of four meteorological factors (i.e., mean, minimum temperatures, sunshine duration, and relative humidity). The results demonstrated that whole Korean agro-climatic zones have been undergoing a significant change in the annual ET0 for the last 36 years. Understanding the spatial pattern and the long-term variation of the annual ET0 associated with global warming would be useful to improve crop and water resource managements at each agro-climatic zone of South Korea.

본 연구는 1980년부터 2015년까지 논 농업기후지대에 대한 연 기준 증발산량(annual reference evapotranspiration, ET0)을 추정하고 분석하였다. 기상청에서 수집한 61개 지점의 기상자료에 Penman-Monteith 방법을 적용하여 일별 기준 증발산량을 계산하였다. 1980년부터 2015년 동안의 연 기준 증발산량은 평균 1334.1±33.89 mm 이였으며, 해안 지대에서 가장 높게 나타났다. 기준 증발산량은 전체 지대에 대해서 약 2.81 mm/yr의 추세로 증가하였다. 하지만 변화율은 농업기후지대별로 다르게 나타났다. 특히 중부지대와 동부 해안 지대에서 연 기준 증발산량은 가장 크게 증가하였다. 상관계수 분석에 의하면, 연 기준 증발산량의 연 변화는 네가지 기후 요소(평균, 최저기온, 일조시간, 상대습도)와 가장 크게 연관이 있었다. 이 연구는 36년 동안 전체 한국 농업지대에서 연 기준증발산량의 변화를 겪고 있다는 것을 보여주고 있다. 온난화와 관련된 장기간의 연기준 온도의 변화와 공간적 패턴을 이해하는 것은 각 농업기후지대별 수자원 및 작물 관리를 효율적으로 할 수 있도록 도와줄 것으로 생각된다.

Keywords

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