Large and active CO2 uptake by coupled carbonate weathering

Carbonate mineral weathering coupled with aquatic photosynthesis on the continents, herein termed coupled carbonate weathering (CCW), represents a current atmospheric CO2 sink of about 0.5 Pg C/a. Because silicate mineral weathering has been considered the primary geological CO2 sink, CCW's rol...

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Veröffentlicht in:Earth-science reviews Jg. 182; S. 42 - 49
Hauptverfasser: Liu, Zaihua, Macpherson, G.L., Groves, Chris, Martin, Jonathan B., Yuan, Daoxian, Zeng, Sibo
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier B.V 01.07.2018
Schlagworte:
Aquatic photosynthesis
carbon
carbon cycle
carbon dioxide
carbonate minerals
Carbonate weathering
climate
Climate change
CO2 uptake
Global carbon cycle
hydrologic cycle
Land-use change
photosynthesis
silicates
weather
Carbonate weathering
Climate change
Aquatic photosynthesis
CO2 uptake
Land-use change
Global carbon cycle
ISSN:0012-8252, 1872-6828
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Zusammenfassung:Carbonate mineral weathering coupled with aquatic photosynthesis on the continents, herein termed coupled carbonate weathering (CCW), represents a current atmospheric CO2 sink of about 0.5 Pg C/a. Because silicate mineral weathering has been considered the primary geological CO2 sink, CCW's role in the present carbon cycle has been neglected. However, CCW may be helping to offset anthropogenic atmospheric CO2 increases as carbonate minerals weather more rapidly than silicates. Here we provide an overview of atmospheric CO2 uptake by CCW and its impact on global carbon cycling. This overview shows that CCW is linked to climate and land-use change through changes in the water cycle and water-born carbon fluxes. Projections of future changes in carbon cycling should therefore include CCW as linked to the global water cycle and land-use change.
Bibliographie:ObjectType-Article-1
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ISSN:0012-8252
1872-6828
DOI:10.1016/j.earscirev.2018.05.007