Carbon Fluxes and Sinks: the Consumption of Atmospheric and Soil CO2 by Carbonate Rock Dissolution

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	Carbon Fluxes and Sinks: the Consumption of Atmospheric and Soil CO2 by Carbonate Rock Dissolution
	Cao, JH (Cao Jianhua); Yuan, DX (Yuan Daoxian); Groves, C (Groves, Chris); Huang, F (Huang Fen); Yang, H (Yang Hui); Lu, Q (Lu Qian)
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2012
卷号	86 期号:4 页码:963-972
关键词	carbonate rock carbon transfer carbon flux and sink exchange between inorganic carbon and organic carbon
ISSN号	1000-9515
英文摘要	Carbonate rock outcrops cover 9%16% of the continental area and are the principal source of the dissolved inorganic carbon (DIC) transferred by rivers to the oceans, a consequence their dissolution. Current estimations suggest that the flux falls between 0.10.6 PgC/a. Taking the intermediate value (0.3 PgC/a), it is equal to 18% of current estimates of the terrestrial vegetation net carbon sink and 38% of the soil carbon sink. In China, the carbon flux from carbonate rock dissolution is estimated to be 0.016 PgC/a, which accounts for 21%, 87.5%150% and 2.3 times of the forest, shrub and grassland net carbon sinks respectively, as well as 23%40% of the soil carbon sink flux. Carbonate dissolution is sensitive to environmental and climatic changes, the rate being closely correlated with precipitation, temperature, also with soil and vegetation cover. HCO3 in the water is affected by hydrophyte photosynthesis, resulting in part of the HCO3 being converted into DOC and POC, which may enhance the potential of carbon sequestration by carbonate rock dissolution. The possible turnover time of this carbon is roughly equal to that of the sea water cycle (2000a). The uptake of atmospheric/soil CO2 by carbonate rock dissolution thus plays an important role in the global carbon cycle, being one of the most important sinks. A major research need is to better evaluate the net effect of this sink in comparison to an oceanic source from carbonate mineral precipitation.
学科主题	矿床地质
WOS关键词	LAST GLACIAL MAXIMUM ; ORGANIC-MATTER ; KARST AREAS ; CYCLE ; SEQUESTRATION ; BUDGET ; SENSITIVITY ; DIOXIDE ; EROSION ; SYSTEM
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000307378800015
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39461]
专题	中国地质调查局
作者单位	Western Kentucky Univ, Bowling Green, KY 42101 USA
推荐引用方式 GB/T 7714	Cao, JH ,Yuan, DX ,Groves, C ,et al. Carbon Fluxes and Sinks: the Consumption of Atmospheric and Soil CO2 by Carbonate Rock Dissolution[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2012,86(4):963-972.
APA	Cao, JH ,Yuan, DX ,Groves, C ,Huang, F ,Yang, H ,&Lu, Q .(2012).Carbon Fluxes and Sinks: the Consumption of Atmospheric and Soil CO2 by Carbonate Rock Dissolution.ACTA GEOLOGICA SINICA-ENGLISH EDITION,86(4),963-972.
MLA	Cao, JH ,et al."Carbon Fluxes and Sinks: the Consumption of Atmospheric and Soil CO2 by Carbonate Rock Dissolution".ACTA GEOLOGICA SINICA-ENGLISH EDITION 86.4(2012):963-972.