On the Role of Density-Driven Dissolution of CO2 in Phreatic Karst Systems

On the Role of Density-Driven Dissolution of CO2 in Phreatic Karst Systems

H. Class, P. Bürkle, T. Sauerborn, O. Trötschler, B. Strauch,M. Zimmer

Density-driven dissolution of CO2 in water is long known to be an important trapping mechanism in geological CO2 storage, while the same process is not in the focus of karst literature. Density-driven dissolution may substantially complement karst-formation theories in stagnant water or at low background flow rates. Seasonal variations of CO2 contents in cave atmospheres can trigger fingering regimes and enhanced dissolution of CO2 at the epiphreatic karst water table. The SFB 1313 paper presents experimental results on dissolution dynamics in a 6m high stagnant water column and compares the data to results of numerical simulations, where also background flow was varied.

Water Resources Research 57 (2021)
Corresponding Authors: Holger Class

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