한국농림기상학회지, 제 9권 제3호(2007) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 9, No. 3, (2007), pp. 170~178
DOI: 10.5532/KJAFM.2007.9.3.170
ⓒ Author(s) 2014. CC Attribution 3.0 License.


지표 미량기체 방출에 대한 두 가지 다른 형태의 Enclosure 기반
측정 방법의 응용 및 Flow-through Dynamic System을 이용한
토양 NO 방출의 민감도 분석

군산대학교 토목환경공학부

(2007년 03월 09일 접수; 2007년 07월 11일 수락)

Two Different Enclosure-based Measurements Applications for Trace
Gas Surface Emission and Sensitivity Analysis for Soil NO Emission
by Using a Flow-through Dynamic System

School of Civil and Environmental Engineering, Kunsan National University,
Kunsan, Jeonbuk 573-701, Korea

(Received March 09, 2007; Accepted July 11, 2007)

ABSTRACT
Rapid increases in the concentrations of greenhouse gases and many other chemically important trace gases have occurred over the last several centuries. For understanding the roles of these important gases in global change, it is essential to identify their sources and sinks, to characterize biogenic gas fluxes between the biosphere and atmosphere, and to understand the processes that control them. In this paper, enclosure-based measurements are described in a practical manner for field experiments. Theoretical reviews of mass balance equation in the enclosure and sensitivity of the flow-through dynamic flux chamber technique are presented; specifically for the case of NO flux measurements from soil surface. The physical system and theory behind the flow-through dynamic flux chamber method are examined. New calculation flux formula was introduced by considering NO chemical loss on chamber wall and uncertainties of the NO flux calculation were discussed.

Keyword: Enclosure-based, Closed flux chamber technique, Flow-through dynamic chamber, Sensitivity analysis, Soil NO emission

MAIN

적요

지난 수 세기 동안 온실기체와 기타 화학적으로 중요한 미량기체들이 급격하게 증가하였다. 이러한 주요 기체가 기후 변화에 미치는 영향을 이해하기 위해서는 각 기체들의 흡원과 발원을 규명하고, 생물권과 대기권사이에서 발생하는 생물 기원 기체 플럭스들을 특성화하며, 주요 기체를 조절하는 프로세스들을 이해해야 한다. 본 논문에서는 야외 실험을 위한 실용적 방법인 enclosure 기반의 관측법을 소개한다. 특히, 토양표면에서 방출되는 일산화질소 플럭스에 대한 enclosure 내에서의 질량수지 방정식과 flow-through dynamic 플럭스 챔버 기법의 민감도를 제시하고 low-through dynamic 플럭스 챔버 방법의 물리적인 시스템과 이론을 소개한다. 또한 챔버 벽에서 발생하는 일산화질소의 손실을 고려하므로써 새로운 플럭스 계산식을 소개하였고 그 계산식의 불확실성을 논의하였다.

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