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2021 Vol.8, Issue 1 Preview Page

Original Article

The Continuous Measurement of CO2 Efflux from the Forest Soil Surface by Multi-Channel Automated Chamber Systems

다중채널 자동챔버시스템에 의한 삼림토양의 이산화탄소 유출량의 연속측정

Seung Jin Joo1*
,
Myeong Hui Yim2
,
Jae-Won Ju2
,
Ho-yeon Won3
,
Seon Deok Jin4
주 승진1*
,
임 명희2
,
주 재원2
,
원 호연3
,
진 선덕4
1Director, Center for Atmospheric and Environmental Modeling, Seoul 08375, Korea
2Senior Researcher, Center for Atmospheric and Environmental Modeling, Seoul 08375, Korea
3Researcher, National Institute of Ecology, Seocheon 33657, Korea
4Senior Researcher, National Institute of Ecology, Seocheon 33657, Korea
1대기환경모델링센터 센터장
2대기환경모델링센터 선임연구원
3국립생태원 보전평가연구본부 연구원
4국립생태원 보전평가연구본부 선임연구원
*Corresponding Author
31 March 2021. pp. 32-43
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Abstract

Multichannel automated chamber systems (MCACs) were developed for the continuous monitoring of soil CO2 efflux in forest ecosystems. The MCACs mainly consisted of four modules: eight soil chambers with lids that automatically open and close, an infrared CO2 analyzer equipped with eight multichannel gas samplers, an electronic controller with time-relay circuits, and a programmable logic datalogger. To examine the stability and reliability of the developed MCACs in the field during all seasons with a high temporal resolution, as well as the effects of temperature and soil water content on soil CO2 efflux rates, we continuously measured the soil CO2 efflux rates and micrometeorological factors at the Nam-san experimental site in a Quercus mongolica forest floor using the MCACs from January to December 2010. The diurnal and seasonal variations in soil CO2 efflux rates markedly followed the patterns of changes in temperature factors. During the entire experimental period, the soil CO2 efflux rates were strongly correlated with the temperature at a soil depth of 5 cm (r2 = 0.92) but were weakly correlated with the soil water content (r2 = 0.27). The annual sensitivity of soil CO2 efflux to temperature (Q10) in this forest ranged from 2.23 to 3.0, which was in agreement with other studies on temperate deciduous forests. The annual mean soil CO2 efflux measured by the MCACs was approximately 11.1 g CO2 m-2 day-1. These results indicate that the MCACs can be used for the continuous long-term measurements of soil CO2 efflux in the field and for simultaneously determining the impacts of micrometeorological factors.

Keywords
CO2 efflux
Forest soil
Multi-channel automated chamber systems
Q10
Quercus mongolica

삼림 생태계에서 토양 CO2 유출량의 연속적인 모니터링을 위한 다중채널 자동챔버시스템 (MCACs)을 개발하였다. MCACs는 자동개폐 덮개가 있는 8개의 토양챔버, 8개의 다중채널 가스샘플러를 장착한 적외선 CO2 농도 분석기, 시간 릴레이 회로를 갖춘 전자 컨트롤러, 프로그래밍이 가능한 로직용 자료수집장치로 구성되었다. 사계절 장기간에 걸쳐 야외 현장에서 MCACs의 안전성과 신뢰도를 조사하고, 높은 시간분해능으로 현장 테스트에서 얻은 온도와 토양수분 함량이 토양 CO2 유출에 미치는 효과들을 파악하기 위해, 2010년 1월부터 12월 사이의 기간 동안 남산의 신갈나무림 실험지소에서 MCACs를 사용하여 토양 CO2 유출속도와 미기상 요인들을 지속적으로 측정하였다. 토양 CO2 유출속도의 일변화 및 계절적인 변화는 현저하게 온도 요인의 경향을 따랐다. 전체 실험 기간 동안에 토양 CO2 유출속도는 5 cm 깊이의 토양온도와 밀접한 상관관계 (r2 = 0.92)를 보였으나 토양수분 함량과는 약한 상관관계 (r2 = 0.27)를 나타냈다. 남산 신갈나무림에서 온도에 대한 토양 CO2 유출량의 연간 민감도 (Q10 수치)는 2.23~3.0의 범위에 달했고, 다양한 온대지역의 낙엽활엽수림에 대한 다른 연구들과 일치하였다. MCACs에 의해 측정된 연평균 토양 CO2 유출량은 약 11.1 g CO2 m-2 day-1이었다. 이 결과들은 MCACs가 야외 현장에서 토양 CO2 유출량의 연속적인 장기측정과 동시에 미기상 요인들의 영향을 결정하는데 유용한 시스템임을 나타낸다.

키워드
CO2 유출
삼림토양
다중채널 자동챔버시스템
Q10
신갈나무
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Information
  • Publisher :Korean Society of Ecology and Infrastructure Engineering
  • Publisher(Ko) :응용생태공학회
  • Journal Title :Ecology and Resilient Infrastructure
  • Journal Title(Ko) :응용생태공학회 논문집
  • Volume : 8
  • No :1
  • Pages :32-43
  • Received Date : 2020-12-27
  • Revised Date : 2021-01-14
  • Accepted Date : 2021-01-15
  • DOI :https://doi.org/10.17820/eri.2021.8.1.032
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