干旱区生态环境知识资源中心(Arid): Determining whether Qinghai-Tibet Plateau waterbodies have acted like carbon sinks or sources over the past 20 years

Arid

DOI	10.1016/j.scib.2022.10.023
	Determining whether Qinghai-Tibet Plateau waterbodies have acted like carbon sinks or sources over the past 20 years
	Jia, Junjie; Sun, Kun; Lu, Sidan; Li, Mingxu; Wang, Yafeng; Yu, Guirui; Gao, Yang
通讯作者	Gao, Y
来源期刊	SCIENCE BULLETIN
ISSN	2095-9273
EISSN	2095-9281
出版年	2022
卷号	67 期号:22 页码:2345-2357
英文摘要	Half of all of China's lakes are on the Qinghai-Tibet Plateau (QTP), which are mainly distributed at altitudes above 4000 m asl. Being under conditions of progressively intensifying anthropogenic activities and climate change, the debate on whether QTP lakes act as carbon (C) sinks or sources remains unresolved. This study explores QTP lake C exchange processes and characteristics over the past two decades through field monitoring and data integration. Results reveal high lake carbon dioxide (CO2) exchange flux distribution patterns in its western and southern regions and correspondingly low values in its eastern and northern regions. Lake CO2 exchange flux rates also show significant temporal differences where those in the 2000s and 2010s were significantly higher compared to the 2020s. Annual total CO2 emission flux from QTP lakes has increased from 1.60 Tg C a(-1) in the 2000s to 6.87 Tg C a(-1) in the 2010s before decreasing to 1.16 Tg C a(-1) in the 2020s. However, QTP lakes have generally acted as C sinks when annual ice-cover periods are included in the estimation of annual C budgets. Consequently, QTP lakes are gradually evolving towards C sinks. Some small-sized freshwater lakes on the QTP exhibit C sequestration characteristics while low-mid altitude saltwater lakes also act as C sinks. Therefore, owing to the high uncertainties in the estimation of C exchange flux, the QTP lake C sink capacity has been largely underestimated. (c) 2022 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
英文关键词	Carbon budget Carbon cycle Carbon exchange flux Global climate change Carbon emissions
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000910089600015
WOS关键词	HUMID/SEMI-ARID REGION ; CO2 PARTIAL-PRESSURE ; DIOXIDE EMISSIONS ; METHANE EMISSIONS ; GREENHOUSE GASES ; LAKES ; CHINA ; FLUX ; SUPERSATURATION ; TEMPERATURE
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394340
推荐引用方式 GB/T 7714	Jia, Junjie,Sun, Kun,Lu, Sidan,et al. Determining whether Qinghai-Tibet Plateau waterbodies have acted like carbon sinks or sources over the past 20 years[J],2022,67(22):2345-2357.
APA	Jia, Junjie.,Sun, Kun.,Lu, Sidan.,Li, Mingxu.,Wang, Yafeng.,...&Gao, Yang.(2022).Determining whether Qinghai-Tibet Plateau waterbodies have acted like carbon sinks or sources over the past 20 years.SCIENCE BULLETIN,67(22),2345-2357.
MLA	Jia, Junjie,et al."Determining whether Qinghai-Tibet Plateau waterbodies have acted like carbon sinks or sources over the past 20 years".SCIENCE BULLETIN 67.22(2022):2345-2357.