Paris, 12 August 2014

Ebullition causes methane emissions in tropical reservoirs

For the first time, methane emissions by ebullition from tropical reservoirs have been accurately quantified, revealing that this emission pathway depends on both the water level in the reservoir, which is dependent on the monsoon, and on daily variations in atmospheric pressure. Although tropical reservoirs probably emit over 10% of anthropogenic methane, their emissions are still poorly quantified. In this study, a new automatic system for the continuous measurement of methane fluxes was deployed on the reservoir of the largest hydroelectric dam in Southeast Asia. The results of this work, which was carried out by researchers at the Laboratoire d'Aérologie (CNRS/Université Toulouse III Paul Sabatier) and the Laboratoire Géosciences Environnement Toulouse (CNRS/Université Toulouse III Paul Sabatier/IRD), are published in the journal Biogeosciences dated 13 August 2014.

To download the press release : Press release_Methane emissions and tropical dam



Physical controls on CH4 emissions from a newly flooded subtropical freshwater hydroelectric reservoir: Nam Theun 2, C. Deshmukh, D. Serça, C. Delon, R Tardif, M. Demarty, C. Jarnot, Y. Meyerfeld, V. Chanudet, P. Guédant, W. Rode, S. Desclou, and F. Guérin, Biogeosciences, 13 August 2014.


Researcher l Dominique Serça l T 00 33 5 61 33 27 04 l

Researcher l Frédéric Guérin l T 00 33 5 61 33 26 66 l

CNRS Press Office l Véronique Etienne l T 00 33 1 44 96 51 51 l


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