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Carbon river fluxes and weathering CO2 consumption in the Congo and Amazon river basins

Probst, Jean-Luc and Mortatti, Jefferson and Tardy, Yves Carbon river fluxes and weathering CO2 consumption in the Congo and Amazon river basins. (1994) Applied Geochemistry, Vol. 9 (n° 1). pp. 1-13.

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Official URL: http://dx.doi.org/10.1016/0883-2927(94)90047-7

Abstract

Data on carbon river fluxes recently obtained by the authors for the Congo basin within the framework of the PIRAT Program (INSU-CNRSIORSTOM) arc compmzd with resulls previously obrained for the Amazon basin. A special interest is devoted COt he bicarbonate river fluxe~a nd to their relat~onshipsw ith river discharges.the fluoIatrnospheric and soil COj consumed by rock wcathcring is estimated to be 3.1 X ld and 0.5 X td rnolesialkrn- respectively for the Amaon and the Congo bas~n. These CD2 Ruxcs rcpresenr, respca~vely,6 7.4% and 74.7% of the total bicarbonate river fluxes. A comparison to orher large river basins shows that this contribution ~sdirectlgr clared ro the proportion of carbonate rock areas. A transfer function betwcen the weathering CQ flw and the nver discharge is calculared for each basin and allows the reconstitution of rhe variations of this flux using the river discharge fluctuations during the last century. These znterannual C4 Ruttuatians present average increas~ogr rends of 10% for Amazon basin and only 0.7% for the Congo basin durlng rhe last century.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Applied Geochemistry: http://www.elsevier.com/wps/find/journaldescription.cws_home/768/description#description
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Universidade de São Paulo - USP (BRAZIL)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Université Louis Pasteur-Strasbourg I - ULP (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD
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Deposited By:Florence Amor

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