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Korean Meteorological Society (한국기상학회)
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Long Term Flux Variation Analysis on the Boseong Paddy Field

보성 농업지역에서의 장기간 플럭스 특성 분석

  • Young-Tae Lee (Observation Research Department, National Institute of Meteorological Science) ;
  • Sung-Eun Hwang (Observation Research Department, National Institute of Meteorological Science) ;
  • Byeong-Taek Kim (Observation Research Department, National Institute of Meteorological Science) ;
  • Ki-Hun Kim (Observation Research Department, National Institute of Meteorological Science)
  • 이영태 (국립기상과학원 관측연구부) ;
  • 황성은 (국립기상과학원 관측연구부) ;
  • 김병택 (국립기상과학원 관측연구부) ;
  • 김기훈 (국립기상과학원 관측연구부)
  • Received : 2023.11.04
  • Accepted : 2023.12.13
  • Published : 2024.02.29
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Abstract

In this paper, Annual flux variations in the Boseong Tall Tower (BTT) from 2016 to 2020 were analyzed using data from three levels (2.5 m, 60 m, and 300 m). BTT was installed in Boseong-gun, Jeollanam-do in February 2014 and continued to conduct energy exchange observations such as CO2, sensible heat, and latent heat using the eddy covariance method until March 2023. The BTT was located in a very flat and uniform paddy field, and flux observations were conducted at four levels: 2.5 m, 60 m, 140 m, and 300 m above ground. Surface energy balance was confirmed from observed data of net radiation flux, soil heat flux, sensible heat flux, and latent heat flux. Additionally, 2.5 m height surface fluxes, which are most influenced by agricultural land, were compared with data from Local Data Assimilation and Prediction System (LDAPS) of the Korea Meteorological Administration to evaluate the accuracy of LDAPS flux data. The correlation coefficient between LDAPS flux data and observed values was 0.95 or higher. Excluding summer latent heat flux data, there was a general tendency for LDAPS data to be higher than observed values. The footprint areas estimated below 60 m height mainly covered agricultural land, and flux observations at 2.5 m and 60 m heights showed typical agricultural characteristics. In contrast, the footprint estimated at 300 m height did not show agricultural characteristics, indicating that observations at this height encompassed a wide range, including mountains, sea, and roads. The analysis results of long-term flux observations can contribute to understanding the energy and carbon dioxide fluxes in agricultural fields. Furthermore, these results can be utilized as essential data for validating and improving numerical models related to such fluxes.

Keywords

Acknowledgement

본 연구는 기상청 국립기상과학원 「국가 기상관측 장비 및 관측자료 표준화(KMA2018-00221)」 사업의 지원으로 수행되었습니다.

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