An Outsized Contribution of Rivers to Carbon Emissions From Interconnected Urban River-Lake Networks Within Plains

doi:10.1029/2023GL107250

NIGPAS OpenIR

	An Outsized Contribution of Rivers to Carbon Emissions From Interconnected Urban River-Lake Networks Within Plains
通讯作者	Shi, Wenqing(wqshi@nuist.edu.cn)
	Liu, Boyi 1; Zhang, Runyu 1; Zhu, Lin 1; Wang, Jun2 ; Qin, Boqiang 3; Shi, Wenqing 1
	2024-05-16
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
卷号	51 期号:9 页码:9
摘要	Urban aquatic ecosystems in plains are often subject to extensive anthropogenic pollutant inputs and have prolonged times for pollutant degradation, potentially leading to diverse carbon emission patterns. This study explored carbon emission patterns and underlying mechanisms in Ge Lake and its tributaries, located in an urban area within a plain in China. The results revealed that carbon emissions from rivers were significantly higher than those from the downstream lake. Spatial interpolation analysis further revealed that CO2-eq emissions from a 1-km2 river area can be equivalent to those from an area as large as 86-km2 of the downstream lake. Rivers are the gateway for the entry of organic compounds, often carrying substances that are readily biodegradable. As the river water moves slowly, these compounds accumulate and undergo degradation in rivers before they reach downstream lakes. The findings may benefit the estimates of carbon emissions in these regions with greater precision. Carbon dioxide (CO2) and methane (CH4) are the two most important greenhouse gases. Inland waters are hotspots of CO2 and CH4 emissions, greatly contributing to atmospheric levels. This study investigated the patterns of CO2 and CH4 emissions from aquatic ecosystems within plains, known for high pollutant loads and extended residence times. The results revealed that CO2 and CH4 emissions from rivers were significantly higher than those from the downstream receiving lake, exhibiting a decrease along the river flow direction. Rivers serve as the gateway for the entry of pollutants to aquatic environments, often carrying substances that are readily biodegradable. As the river water moves slowly, these compounds accumulate and undergo degradation in rivers before they reach downstream lakes, and therefore, CO2 and CH4 emissions diminish in the downstream direction. The findings add the understanding of carbon emissions in plain aquatic ecosystems, and benefit their estimates in these regions with greater precision. Carbon emissions from urban rivers were higher than the downstream receiving lake Carbon emissions exhibited a decreasing trend along the river flow direction Urban rivers warrant more attention in regional estimates of carbon emissions
DOI	10.1029/2023GL107250
收录类别	SCI
语种	英语
关键词[WOS]	ORGANIC-MATTER ; RESIDENCE TIME ; BOREAL LAKES ; WIND-SPEED ; METHANE ; WATER ; DIOXIDE ; TRANSPORT ; DYNAMICS ; FATE
资助项目	National Natural Science Foundation of China ; Starting Research Fund of Nanjing University of Information Engineering[2021r097] ; [42277060] ; [BK20220041]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001209366400001
项目资助者	National Natural Science Foundation of China ; Starting Research Fund of Nanjing University of Information Engineering
出版者	AMER GEOPHYSICAL UNION
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/43679
专题	中国科学院南京地质古生物研究所
通讯作者	Shi, Wenqing
作者单位	1.Nanjing Univ Informat Sci & Technol, Jiangsu Collaborat Innovat Ctr Atmospher Environm, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & Po, Nanjing, Peoples R China 2.Yangzhou Univ, Coll Anim Sci & Technol, Yangzhou, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Taihu Lake Lab Ecosyst Stn, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Boyi,Zhang, Runyu,Zhu, Lin,et al. An Outsized Contribution of Rivers to Carbon Emissions From Interconnected Urban River-Lake Networks Within Plains[J]. GEOPHYSICAL RESEARCH LETTERS,2024,51(9):9.
APA	Liu, Boyi,Zhang, Runyu,Zhu, Lin,Wang, Jun,Qin, Boqiang,&Shi, Wenqing.(2024).An Outsized Contribution of Rivers to Carbon Emissions From Interconnected Urban River-Lake Networks Within Plains.GEOPHYSICAL RESEARCH LETTERS,51(9),9.
MLA	Liu, Boyi,et al."An Outsized Contribution of Rivers to Carbon Emissions From Interconnected Urban River-Lake Networks Within Plains".GEOPHYSICAL RESEARCH LETTERS 51.9(2024):9.