Atmospheric CO2 sink: Silicate weathering or carbonate weathering?

	Atmospheric CO2 sink: Silicate weathering or carbonate weathering?
	Zaihua Liu; Wolfgang Dreybrodt; Huan Liu
	2011
发表期刊	Applied Geochemistry
卷号	26 期号:S 页码:S292-S294
摘要	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.
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/6980
专题	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
推荐引用方式 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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