干旱区生态环境知识资源中心(Arid): A large carbon pool in lake sediments over the arid/semiarid region, NW China

Arid

	A large carbon pool in lake sediments over the arid/semiarid region, NW China
	Lan Jianghu; Xu Hai; Liu Bin; Sheng Enguo; Zhao Jiangtao; Yu Keke
来源期刊	Chinese Journal of Geochemistry
ISSN	1000-9426
出版年	2015
卷号	34 期号:3 页码:289-298
英文摘要	Carbon burial in lake sediments is an important component of the global carbon cycle. However, little is known about the magnitude of carbon sequestered in lake sediments over the arid/semiarid region of China (ASAC). In this study, we estimate both organic and inorganic carbon burial since ~_(AD) 1800 based on nine lakes in ASAC, and discuss the most plausible factors controlling carbon burial. Our estimates show that the annual organic carbon burial rate (OCBR) ranges from 5.3 to 129.8 g cm~(-2) year~(-1) (weighted mean of 49.9 g cm~(-2) year~(-1)), leading to a standing stock of 1.1-24.0 kg cm~(-2) (weighted mean of 8.6 kg cm~(-2)) and a regional sum of ~ 108 Tg organic carbon sequestered since ~ AD 1800. The annual inorganic carbon burial rate (ICBR) ranges from 11.4 to 124.0 g cm~(-2) year~(-1) (weighted mean of 48.3 g cm~(-2) year~(-1)), which is slightly lower than OCBR. The inorganic carbon standing stock ranges from 2.4 to 26.0 kg cm~(-2) (weighted mean of 8.1 kg cm~(-2)), resulting in a sum of ~ 101 Tg regional inorganic carbon burial since ~_(AD) 1800, which is slightly lower than the organic carbon sequestration. OCBR in ASAC shows a continuously increasing trend since ~ _(AD) 1950, which is possibly due to the high autochthonous and allochthonous primary production and subsequently high sedimentation rate in the lakes. This increasing carbon burial is possibly related to both climatic changes and enhanced anthropogenic activities, such as land use change, deforestation, and eutrophication in the lake. Furthermore, OCBR and ICBR are expected to continuously increase under the scenario of increasing precipitation and runoff and enhanced anthropogenic activities. The results of this research show that the buried carbon in lake sediments of the ASAC region constitutes a significant and large carbon pool, which should be considered and integrated into the global carbon cycle.
英文关键词	Organic and inorganic carbon burials Lake sediments ASAC Carbon cycle
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5509562
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335541
作者单位	Lan Jianghu, Institute of Earth Environment. Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710061, China.; Xu Hai, Institute of Earth Environment. Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710061, China.; Liu Bin, Institute of Earth Environment. Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710061, China.; Sheng Enguo, Institute of Earth Environment. Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710061, China.; Zhao Jiangtao, Institute of Earth Environment. Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710061, China.; Yu Keke, Institute of Earth Environment. Chinese Academy of Sciences, State Key Laboratory of Loess and Quaternary Geology, Xi'an, Shaanxi 710061, China.
推荐引用方式 GB/T 7714	Lan Jianghu,Xu Hai,Liu Bin,et al. A large carbon pool in lake sediments over the arid/semiarid region, NW China[J],2015,34(3):289-298.
APA	Lan Jianghu,Xu Hai,Liu Bin,Sheng Enguo,Zhao Jiangtao,&Yu Keke.(2015).A large carbon pool in lake sediments over the arid/semiarid region, NW China.Chinese Journal of Geochemistry,34(3),289-298.
MLA	Lan Jianghu,et al."A large carbon pool in lake sediments over the arid/semiarid region, NW China".Chinese Journal of Geochemistry 34.3(2015):289-298.