岩溶空洞大气动力学中的二氧化碳:以aven d’Orgnac为例(ardeche)

Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Pub Date : 2001-12-15 DOI:10.1016/S1251-8050(01)01682-2

François Bourges , Alain Mangin , Dominique d'Hulst

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引用次数: 65

摘要

对埃文-德-奥纳克地区大气CO2浓度的研究表明，空气动力传递是岩溶系统动力学的一个重要过程。当地的气象条件和洞穴的几何形状决定了洞穴大气与外部环境之间的交换。富含生物源二氧化碳的空气通过微裂隙网络从土壤双相渗透到洞穴中，在洞穴中，它不断地从岩壁产生。通过对密闭区空气动力学排空分析和直接流量测量，得出了溶洞岩壁单位面平均CO2产量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Le gaz carbonique dans la dynamique de l'atmosphère des cavités karstiques : l'exemple de l'Aven d'Orgnac (Ardèche)

A survey of CO₂ concentrations in the atmosphere of the Aven d'Orgnac shows that aerodynamic transfer can be a major process in karst system dynamics. The local meteorological conditions and the geometry of the cavity govern exchanges between the cave atmosphere and the exterior. Air enriched with biogenic CO₂ is transferred through the microfissural network by diphasic infiltration from soil to caves where it is continuously produced from rock walls. Analysis of the aerodynamic emptying of confined zones and direct flow measurement give a mean CO₂ production per surface unit of the cave rock wall.

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Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science

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