Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Estimating the Changes in Forest Carbon Dynamics of Pinus densiflora and Quercus variabilis Forests in South Korea under the RCP 8.5 Climate Change Scenario

RCP 8.5 기후변화 시나리오에 따른 소나무림과 굴참나무림의 산림 탄소 동태 변화 추정 연구

  • Lee, Jongyeol (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University) ;
  • Han, Seung Hyun (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University) ;
  • Kim, Seongjun (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University) ;
  • Chang, Hanna (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University) ;
  • Yi, Myong Jong (Department of Forest Resources, Kangwon National University) ;
  • Park, Gwan Soo (Department of Environment and Forest Resources, Chungnam National University) ;
  • Kim, Choonsig (Department of Forest Resources, Gyeongnam National University of Science and Technology) ;
  • Son, Yeong Mo (Department of Forest and Climate Change, Korea Forest Research Institute) ;
  • Kim, Raehyun (Department of Forest and Climate Change, Korea Forest Research Institute) ;
  • Son, Yowhan (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University)
  • 이종열 (고려대학교 대학원 환경생태공학과) ;
  • 한승현 (고려대학교 대학원 환경생태공학과) ;
  • 김성준 (고려대학교 대학원 환경생태공학과) ;
  • 장한나 (고려대학교 대학원 환경생태공학과) ;
  • 이명종 (강원대학교 산림자원학과) ;
  • 박관수 (충남대학교 산림환경자원학과) ;
  • 김춘식 (경남과학기술대학교 산림자원학과) ;
  • 손영모 (국립산림과학원 기후변화연구센터) ;
  • 김래현 (국립산림과학원 기후변화연구센터) ;
  • 손요환 (고려대학교 대학원 환경생태공학과)
  • Received : 2014.08.06
  • Accepted : 2015.01.27
  • Published : 2015.03.30
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Abstract

Forests contain a huge amount of carbon (C) and climate change could affect forest C dynamics. This study was conducted to predict the C dynamics of Pinus densiflora and Quercus variabilis forests, which are the most dominant needleleaf and broadleaf forests in Korea, using the Korean Forest Soil Carbon (KFSC) model under the two climate change scenarios (2012-2100; Constant Temperature (CT) scenario and Representative Concentration Pathway (RCP) 8.5 scenario). To construct simulation unit, the forest land areas for those two species in the 5th National Forest Inventory (NFI) data were sorted by administrative district and stand age class. The C pools were initialized at 2012, and any disturbance was not considered during the simulation period. Although the forest C stocks of two species generally increased over time, the forest C stocks under the RCP 8.5 scenario were less than those stocks under the CT scenario. The C stocks of P. densiflora forests increased from 260.4 Tg C in 2012 to 395.3 (CT scenario) or 384.1 Tg C (RCP 8.5 scenario) in 2100. For Q. variabilis forests, the C stocks increased from 124.4 Tg C in 2012 to 219.5 (CT scenario) or 204.7 (RCP 8.5 scenario) Tg C in 2100. Compared to 5th NFI data, the initial value of C stocks in dead organic matter C pools seemed valid. Accordingly, the annual C sequestration rates of the two species over the simulation period under the RCP 8.5 scenario (65.8 and $164.2g\;C\;m^{-2}\;yr^{-1}$ for P. densiflora and Q. variabilis) were lower than those values under the CT scenario (71.1 and $193.5g\;C\;m^{-2}\;yr^{-1}$ for P. densiflora and Q. variabilis). We concluded that the C sequestration potential of P. densiflora and Q. variabilis forests could be decreased by climate change. Although there were uncertainties from parameters and model structure, this study could contribute to elucidating the C dynamics of South Korean forests in future.

산림은 많은 양의 탄소를 저장하고 있으며, 산림 탄소 동태는 기후변화에 따라 변화할 것으로 예상된다. 본 연구는 우리나라 산림에서 가장 우점하는 침엽수종과 활엽수종인 소나무림과 참나무림을 대상으로 최근 개발 및 개선된 한국형산림토양탄소모델(Korean Forest Soil Carbon model; KFSC model)을 이용하여 두 가지 기후변화 시나리오(2012년 기온이 2100년까지 유지되는 시나리오(CT), Representative Concentration Pathway(RCP) 8.5 시나리오) 하에서의 산림 탄소 동태를 예측하였다. 5차 국가산림자원조사 자료로부터 소나무림과 굴참나무림 조사구들을 추출한 뒤, 이를 행정구역(9개 도, 7개 특별 광역시) 및 영급(1-5영급, 6영급 이상)별로 분류하여 탄소 동태 모의 단위를 설정하였다. 탄소 저장고는 2012년을 기준으로 초기화하였으며, 모의 기간인 2012년부터 2100년까지 모든 교란은 고려하지 않았다. 모의 결과 산림 탄소 저장량은 시간이 경과함에 따라 전반적으로 증가하지만, CT 시나리오에 비하여 RCP 8.5 시나리오 하에서 산림 탄소 저장량이 낮게 나타났다. 소나무림의 탄소 저장량(Tg C)은 2012년에 260.4에서 2100년에는 각각 395.3(CT 시나리오) 및 384.1(RCP 8.5 시나리오)로 증가하였다. 굴참나무림의 탄소 저장량(Tg C)은 2012년에 124.4에서 2100년에는 219.5(CT 시나리오) 및 204.7(RCP 8.5 시나리오)로 각각 증가하였다. 5차 국가산림자원조사 자료와 비교한 결과, 고사유기물 탄소 저장량의 초기값은 타당한 것으로 나타났다. 모의 기간 동안 소나무림과 굴참나무림의 연간 탄소 흡수율($g\;C\;m^{-2}\;yr^{-1}$)은 CT 시나리오 하에서 각각 71.1과 193.5, RCP 8.5 시나리오 하에서 각각 65.8과 164.2로 추정된다. 따라서 우리나라 소나무림과 굴참나무림의 탄소 흡수잠재력은 지구 온난화에 의하여 감소할 것으로 예상된다. 비록 모델의 구조와 파라미터로부터 불확실성이 존재하지만 본 연구는 미래 산림 탄소 동태 파악에 기여할 것으로 기대된다.

Keywords

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