干旱区生态环境知识资源中心(Arid): Salinity is an important factor in carbon emissions from an inland lake in arid region

Arid

DOI	10.1016/j.scitotenv.2023.167721
	Salinity is an important factor in carbon emissions from an inland lake in arid region
	Liao, Yuanshan; Xiao, Qitao; Li, Yimin; Yang, Chen; Li, Junli; Duan, Hongtao
通讯作者	Duan, HT
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	906
英文摘要	Saline lakes, serving as the ultimate destination for most hydrological systems, accumulate substantial amounts of nutrients and organic matter from basins, and act as vast carbon reservoirs. These lakes exhibit exceptionally active biogeochemical cycling processes of carbon dioxide (CO2) and methane (CH4), and constitute integral components of the global carbon cycle. However, understanding of greenhouse gas emissions from saline lakes remains unclear mostly due to scarce data. In this study, we obtained CO2 and CH4 diffusive fluxes and biogeochemical parameters during ice-free period of 2021 at Bosten Lake, which is a representative inland saline lake located in China's arid region. Results revealed that Bosten Lake was a significant source of atmospheric gas carbon emissions, with average diffusion emissions of 12.645 +/- 3.475 mmol m(-2) d(-1) for CO2 and 0.279 +/- 0.069 mmol m(-2) d(-1) for CH4. Temporally, field measurements found a positive correlation between conductivity (Spc, a proxy of salinity) and CO2 emissions (R-2 = 0.50, p < 0.01). Furthermore, the CH4 diffusive fluxes increased with the trophic state index (TSI, R-2 = 0.31, p < 0.01). Spatially, exogenous inputs led to the spatial heterogeneity of carbon emissions. Our results highlighted that temporal variations in salinity constitute a crucial factor influencing CO2 emissions, and the saline lake has greater global warming potential compared to freshwater. The study provides an in-depth analysis of greenhouse gas emissions and driving factors in saline lakes of arid regions, and supports a further understanding of the carbon cycle in different types of lakes.
英文关键词	CO2 diffusion fluxes CH(4 )diffusion fluxes Spatiotemporal variation Conductivity Trophic state
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001103555800001
WOS关键词	DISSOLVED ORGANIC-MATTER ; METHANE EMISSIONS ; GREENHOUSE GASES ; CO2 FLUX ; DIOXIDE EMISSIONS ; BOREAL LAKES ; SHALLOW-LAKE ; BOSTEN LAKE ; SUPERSATURATION ; TEMPERATURE
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405418
推荐引用方式 GB/T 7714	Liao, Yuanshan,Xiao, Qitao,Li, Yimin,et al. Salinity is an important factor in carbon emissions from an inland lake in arid region[J],2024,906.
APA	Liao, Yuanshan,Xiao, Qitao,Li, Yimin,Yang, Chen,Li, Junli,&Duan, Hongtao.(2024).Salinity is an important factor in carbon emissions from an inland lake in arid region.SCIENCE OF THE TOTAL ENVIRONMENT,906.
MLA	Liao, Yuanshan,et al."Salinity is an important factor in carbon emissions from an inland lake in arid region".SCIENCE OF THE TOTAL ENVIRONMENT 906(2024).