| Atmospheric CO2 sink: Silicate weathering or carbonate weathering? | |
| Zaihua Liu; Wolfgang Dreybrodt; Huan Liu | |
| 2011 | |
| Source Publication | Applied Geochemistry
 |
| Volume | 26Issue:SPages:S292-S294 |
| Abstract | It is widely accepted that chemical weathering of Ca–silicate rocks could potentially control long-term climate change by providing feedback interaction with atmospheric CO2 drawdown by means of precipitation of carbonate, and that in contrast weathering of carbonate rocks has not an equivalent impact because all of the CO2 consumed in the weathering process is returned to the atmosphere by the comparatively rapid precipitation of carbonates in the oceans. Here, it is shown that the rapid kinetics of carbonate dissolution and the importance of small amounts of carbonate minerals in controlling the dissolved inorganic C (DIC) of silicate watersheds, coupled with aquatic photosynthetic uptake of the weathering-related DIC and burial of some of the resulting organic C, suggest that the atmospheric CO2 sink from carbonate weathering may previously have been underestimated by a factor of about 3, amounting to 0.477 Pg C/a. This indicates that the contribution of silicate weathering to the atmospheric CO2 sink may be only 6%, while the other 94% is by carbonate weathering. Therefore, the atmospheric CO2 sink by carbonate weathering might be significant in controlling both the short-term and long-term climate changes. This questions the traditional point of view that only chemical weathering of Ca–silicate rocks potentially controls long-term climate change. |
| Subject Area | 环境地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/6980 |
| Collection | 环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文 |
| Recommended Citation GB/T 7714 | Zaihua Liu,Wolfgang Dreybrodt,Huan Liu. Atmospheric CO2 sink: Silicate weathering or carbonate weathering?[J]. Applied Geochemistry,2011,26(S):S292-S294. |
| APA | Zaihua Liu,Wolfgang Dreybrodt,&Huan Liu.(2011).Atmospheric CO2 sink: Silicate weathering or carbonate weathering?.Applied Geochemistry,26(S),S292-S294. |
| MLA | Zaihua Liu,et al."Atmospheric CO2 sink: Silicate weathering or carbonate weathering?".Applied Geochemistry 26.S(2011):S292-S294. |
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