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Distinctive Patterns and Controls of Nitrous Oxide Concentrations and Fluxes from Urban Inland Waters
Wang, Gongqin1; Xia, Xinghui1; Liu, Shaoda1; Zhang, Sibo2; Yan, Weijin3; McDowell, William H.4
2021-06-15
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume55Issue:12Pages:8422-8431
Corresponding AuthorXia, Xinghui(xiaxh@bnu.edu.cn)
AbstractInland waters are significant sources of nitrous oxide (N2O), a powerful greenhouse gas. However, considerable uncertainty exists in the estimates of N2O efflux from global inland waters due to a lack of direct measurements in urban inland waters, which are generally characterized by high carbon and nitrogen concentrations and low carbon-to-nitrogen ratios. Herein, we present direct measurements of N2O concentrations and fluxes in lakes and rivers of Beijing, China, during 2018-2020. N2O concentrations and fluxes in the waters of Beijing exceeded previous estimates of global rivers due to the high carbon and nutrient concentrations and high aquatic productivity. In contrast, the N2O emission factor (N2O-N/DIN, median 0.0005) was lower than global medians and the N2O yield (Delta N2O/(Delta N2O + Delta N)(2) average 1.6%) was higher than those typically observed in rivers and streams. The positive relationship between N2O and denitrifying bacteria as well as the Michaelis-Menten relationship between N2O emissions and NO3--N concentrations suggested that bacteria control the net production ofN(2)O in waters of Beijing with N saturation, leading to a low N2O emission factor. However, low carbon-to-nitrogen ratios are beneficial for N2O accumulation during denitrification, resulting in high N2O yields. This study demonstrates the significant N2O emissions and their distinctive patterns and controls in urban inland waters and suggests that N2O emission estimates based on nitrogen loads and simple emission factor values are not appropriate for urban inland water systems.
Keywordnitrous oxide (N2O ) greenhouse gas N2O emission factor N2O yield urban inland waters wastewater treatment plants
DOI10.1021/acs.est.1c00647
WOS KeywordDISSIMILATORY NITRATE REDUCTION ; GREENHOUSE-GAS EMISSIONS ; N2O EMISSIONS ; RIVER NETWORK ; DENITRIFICATION ; STREAM ; SCALE ; CARBON ; NITRIFICATION ; SEDIMENTS
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFA0605001] ; National Natural Science Foundation of China[52039001] ; National Natural Science Foundation of China[92047303]
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
WOS IDWOS:000663939900065
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/163894
Collection中国科学院地理科学与资源研究所
Corresponding AuthorXia, Xinghui
Affiliation1.Beijing Normal Univ, Sch Environm, Key Lab Water & Sediment Sci, State Key Lab Water Environm Simulat,Minist Educ, Beijing 100875, Peoples R China
2.Guangdong Univ Technol, Inst Environm & Ecol Engn, Guangdong Prov Key Lab Water Qual Improvement & E, Guangzhou 510006, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
4.Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA
Recommended Citation
GB/T 7714
Wang, Gongqin,Xia, Xinghui,Liu, Shaoda,et al. Distinctive Patterns and Controls of Nitrous Oxide Concentrations and Fluxes from Urban Inland Waters[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,55(12):8422-8431.
APA Wang, Gongqin,Xia, Xinghui,Liu, Shaoda,Zhang, Sibo,Yan, Weijin,&McDowell, William H..(2021).Distinctive Patterns and Controls of Nitrous Oxide Concentrations and Fluxes from Urban Inland Waters.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55(12),8422-8431.
MLA Wang, Gongqin,et al."Distinctive Patterns and Controls of Nitrous Oxide Concentrations and Fluxes from Urban Inland Waters".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55.12(2021):8422-8431.
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