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자료유형
학술저널
저자정보
저널정보
한국대기환경학회 한국대기환경학회지(영문) 한국대기환경학회지 제21권 제E3호
발행연도
2005.9
수록면
75 - 85 (11page)

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A mathematical sensitivity analysis of the flow-through dynamic flux chamber technique, which has been utilized usually for various trace gas flux measurement from soil and water surface, was performed in an effort to provide physical and mathematical understandings of parameters essential for the NO flux calculation. The mass balance equation including chemical reactions was analytically solved for the soil NO flux under the steady state condition. The equilibrium concentration inside the chamber, Ceq, was found to be determined mainly by the balance between the soil flux and dilution of the gas concentration inside the chamber by introducing the ambient air. Surface deposition NO occurs inside the chamber when the Ceq is greater than the ambient NO concentration (C。) introducing to the chamber; NO emission from the soil occurs when the Ceq is less than the ambient NO concentration.
A sensitivity analysis of the significance of the chemical reactions of NO with the reactive species (i.e. HO₂, CH₃O₂, O₃) on the NO flux from soils was performed. The result of the analysis suggests that he NO flux calculated in the absence of chemical reactions and wall loss could be in error ranges from 40 to 85% to the total flux.

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Abstract

1. INTRODUCTION

2. SYSTEM OF THE FLOW - THROUGH DYNAMIC CHAMBER

3. FLUX CALCULATION METHODOLOGY

4. SENSITIVITY ANALYSIS OF THE CHEMICAL LOSS EFFECTS ON THE FLUX CALCULATION

5. SUMMARY AND CONCLUSIONS

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