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

DOI	10.1007/s11631-015-0047-5
	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
通讯作者	Lan, JH
来源期刊	ACTA GEOCHIMICA
ISSN	2096-0956
EISSN	2365-7499
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 similar to 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 similar to 108 Tg organic carbon sequestered since similar to 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 similar to 101 Tg regional inorganic carbon burial since similar to AD 1800, which is slightly lower than the organic carbon sequestration. OCBR in ASAC shows a continuously increasing trend since similar to 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	ESCI
WOS记录号	WOS:000381221600002
WOS关键词	LAND-USE CHANGES ; ORGANIC-CARBON ; PRECIPITATION RECONSTRUCTION ; LACUSTRINE SEDIMENTS ; TERRESTRIAL CARBON ; WATER-CONTENT ; BOSTEN LAKE ; DAIHAI LAKE ; ICE-AGE ; SINK
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	中国科学院地球环境研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/331257
作者单位	[Lan, Jianghu; Xu, Hai; Liu, Bin; Sheng, Enguo; Zhao, Jiangtao; Yu, Keke] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China; [Liu, Bin] Zunyi Normal Coll, Coll Resources & Environm, Zunyi 563002, Peoples R China; [Sheng, Enguo; Yu, Keke] Univ Chinese Acad Sci, Beijing 100049, Peoples R 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]. 中国科学院地球环境研究所,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.ACTA GEOCHIMICA,34(3),289-298.
MLA	Lan, Jianghu,et al."A large carbon pool in lake sediments over the arid/semiarid region, NW China".ACTA GEOCHIMICA 34.3(2015):289-298.