한국농림기상학회지 (Korean Journal of Agricultural and Forest Meteorology)

  • 제26권3호
  • /
  • Pages.199-207
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  • 2024
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  • 1229-5671(pISSN)
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  • 2288-1859(eISSN)
한국농림기상학회 (Korean Society of Agricultural and Forest Meteorology)
권호 표지
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논 메탄 배출 관측을 위한 폐쇄형 챔버의 합리적인 가스 포집 시간대 분석

Analysis of Reasonable Sampling Times for Measuring Methane Emissions using the Closed Chamber Method in Rice Paddy Field

  • 김현기 (농촌진흥청 국립식량과학원 작물재배생리과) ;
  • 이윤호 (농촌진흥청 국립식량과학원 작물재배생리과) ;
  • 김헌중 (농촌진흥청 국립식량과학원 작물재배생리과) ;
  • 박현진 (농촌진흥청 국립식량과학원 작물재배생리과) ;
  • 이희우 (농촌진흥청 국립식량과학원 작물재배생리과) ;
  • 윤종탁 (농촌진흥청 국립식량과학원 작물재배생리과) ;
  • 장재기 (농촌진흥청 국립식량과학원 작물재배생리과) ;
  • 박혜란 (농촌진흥청 국립농업과학원 기후변화평가과)
  • HyunKi Kim (Crop Production and Physiology Division, National Institute of Crop Science, Rural Development Administration) ;
  • Yun-Ho Lee (Crop Production and Physiology Division, National Institute of Crop Science, Rural Development Administration) ;
  • Heon-Joong Kim (Crop Production and Physiology Division, National Institute of Crop Science, Rural Development Administration) ;
  • Hyun-Jin Park (Crop Production and Physiology Division, National Institute of Crop Science, Rural Development Administration) ;
  • Hee-woo Lee (Crop Production and Physiology Division, National Institute of Crop Science, Rural Development Administration) ;
  • Jong-Tak Yoon (Crop Production and Physiology Division, National Institute of Crop Science, Rural Development Administration) ;
  • Jaeki Chang (Crop Production and Physiology Division, National Institute of Crop Science, Rural Development Administration) ;
  • Hye-Ran Park (Climate Change Assessment Division, National Institute of Agricultural Sciences, Rural Development Administration)
  • 투고 : 2024.09.13
  • 심사 : 2024.09.30
  • 발행 : 2024.09.30
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초록

농업생태계, 특히 논에서의 메탄 배출량 추정을 위해 가스크로마토그래피를 이용한 폐쇄형 챔버법은 주로 사용되고 있는 방법이다. 본 연구에서는 폐쇄형 챔버법을 효과적으로 사용하기 위한 합리적인 메탄 포집시간을 찾는데 기여하고자 하루 동안 2시간 간격으로 관측을 수행하고 그 모든 자료를 공개하였다. 6월부터 9월까지의 벼 재배 기간 동안 총 4회에 걸쳐 메탄 배출의 일 변화를 관측한 결과, 오전(8:00~12:00)과 늦은 오후(16:00~20:00)의 메탄 배출량이 하루 동안 관측한 값의 평균으로 나타났다. 향후 불연속적인 관측의 한계를 가지는 가스크로마토그래피를 이용한 폐쇄형 챔버법의 단점을 보완하고자 연속 관측이 가능한 에디공분산 미기상법과 같이 비교하여 신뢰도 높은 관측값을 얻는 연구가 필요할 것으로 사료된다.

Measuring and estimating methane (CH4) emissions accurately is important in rice paddy field. For reliable estimation, diurnal and seasonal variations of methane must be tracked, and measured frequently. The closed chamber method proposed according to the IPCC guidelines is relatively cheap and easy to move, so it is widely used, but it is difficult to estimate accurate methane emissions due to spatiotemporal constraints such as sampling time and number of measuring times. In this paper, the diurnal variation pattern was analyzed by measuring methane emissions four times at two-hour intervals throughout the day during the rice growth stage. When the emissions for each time period were converted to a daily time-weighted average, the diurnal average methane flux appeared in the time periods of 8:00~12:00 and 16:00~20:00. Through our results, we hope to provide useful information about determining reasonable times of methane measurement to researchers who measure methane emissions in rice paddy fields using the closed chamber method in the future.

키워드

과제정보

본 성과물(논문)은 농촌진흥청 연구사업(과제번호: RS-2024-00398957)의 지원에 이루어진 것임. 본 연구는 2024년도 농촌진흥청 (국립식량과학원) 전문연구원 과정 지원사업에 의해 이루어진 것임.

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