干旱区生态环境知识资源中心(Arid): Sequestration of atmospheric carbon dioxide as inorganic carbon in the unsaturated zone under semi-arid forests

Arid

DOI	10.1016/j.catena.2018.09.042
	Sequestration of atmospheric carbon dioxide as inorganic carbon in the unsaturated zone under semi-arid forests
	Carmi, Israel 1; Kronfeld, Joel 1; Moinester, Murray 2
通讯作者	Carmi, Israel
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2019
卷号	173 页码:93-98
英文摘要	Inorganic carbon, as allogenic and pedogenic carbonates mixtures, can be a significant component of arid and semi-arid zone soils. It has been claimed, that the formation of pedogenic carbonates does not sequester atmospheric carbon dioxide, when formed from the preexisting limestone: Ca+2 + 2HCO(3)(-) -> CaCO3 down arrow + CO2 up arrow + H2O. But if the cation is derived from a non-carbonate source sequestration can occur. Among the unconsidered sources in nature are the contribution of Ca+2, released from adsorption sites on the clay surfaces. Analysis of DIC, delta C-13 and Delta C-14 data show in the present study that sequestration does occur within the unsaturated zones (USZ) in a semiarid region: 1) the DIC is depleted as carbonate precipitates into the USZ, 2) the released CO2, does not immediately return to the atmosphere (except for the samples nearest to the surface) but recycles to the soil-gas of high CO2 partial pressure, and 3) that radiocarbon, which is generated only in the overlying atmosphere, and exhaled into the USZ by roots and the decay of soil organic matter, is incorporated within the calcite mineral. Thus, a net sequestration of atmospheric CO2 does occur.
英文关键词	Carbon dioxide sequestration Unsaturated zone Semi-arid region
类型	Article
语种	英语
国家	Israel
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000452814300010
WOS关键词	SOIL ; SINKS ; NEGEV ; WATER ; CO2
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214814
作者单位	1.Tel Aviv Univ, Dept Geosci, IL-69978 Tel Aviv, Israel; 2.Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
推荐引用方式 GB/T 7714	Carmi, Israel,Kronfeld, Joel,Moinester, Murray. Sequestration of atmospheric carbon dioxide as inorganic carbon in the unsaturated zone under semi-arid forests[J],2019,173:93-98.
APA	Carmi, Israel,Kronfeld, Joel,&Moinester, Murray.(2019).Sequestration of atmospheric carbon dioxide as inorganic carbon in the unsaturated zone under semi-arid forests.CATENA,173,93-98.
MLA	Carmi, Israel,et al."Sequestration of atmospheric carbon dioxide as inorganic carbon in the unsaturated zone under semi-arid forests".CATENA 173(2019):93-98.