Subterranean atmospheres may act as daily methane sinks

Citation

Material Information

Title:
Subterranean atmospheres may act as daily methane sinks
Series Title:
Nature Communications
Creator:
Fernandez-Cortes, Angel
Cuezva, Soledad
Alvarez-Gallego, Miriam
Garcia-Anton, Elena
Pla, Concepcion
Benavente, David
Jurado, Valme
Saiz-Jimenez, Cesareo
Sanchez-Moral, Sergio
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Atmospheric ( local )
Chemistry ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
In recent years, methane (CH4) has received increasing scientific attention because it is the most abundant non-CO2 atmospheric greenhouse gas (GHG) and controls numerous chemical reactions in the troposphere and stratosphere. However, there is much that is unknown about CH4 sources and sinks and their evolution over time. Here we show that near-surface cavities in the uppermost vadose zone are now actively removing atmospheric CH4. Through seasonal geochemical tracing of air in the atmosphere, soil and underground at diverse geographic and climatic locations in Spain, our results show that complete consumption of CH4 is favoured in the subsurface atmosphere under near vapour-saturation conditions and without significant intervention of methanotrophic bacteria. Overall, our results indicate that subterranean atmospheres may be acting as sinks for atmospheric CH4 on a daily scale. However, this terrestrial sink has not yet been considered in CH4 budget balances.
Original Version:
Nature Communications, Vol. 6 (2015-04-27).

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University of South Florida Library
Holding Location:
University of South Florida
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This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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