DOI: 10.1016/j.ecolind.2019.105821
论文题名: Carbon and nutrients as indictors of daily fluctuations of pCO2 and CO2 flux in a river draining a rapidly urbanizing area
作者: Li S. ; Luo J. ; Wu D. ; Jun Xu Y.
刊名: Ecological Indicators
ISSN: 1470160X
出版年: 2020
卷: 109 语种: 英语
英文关键词: Carbon cycling
; Carbon flux
; Dissolved organic carbon
; Eutrophication
; Human activities
; River CO2 emission
Scopus关键词: Budget control
; Eutrophication
; Nutrients
; Organic carbon
; Phase interfaces
; River pollution
; Rivers
; Stream flow
; Uncertainty analysis
; Carbon cycling
; Carbon fluxes
; CO2 emissions
; Dissolved organic carbon
; Human activities
; Carbon dioxide
; carbon cycle
; carbon emission
; dissolved organic carbon
; eutrophication
; field method
; human activity
; river water
; spatiotemporal analysis
; urban area
英文摘要: Carbon dioxide (CO2) emission via water-air interface from fluvial networks plays a central role in the global carbon budget. Large uncertainties, however, exist because field measurements are often spatially and temporally biased, while aqueous carbon (C) processing can be strongly affected by anthropogenic activities in rapidly urbanizing areas. Information of controls on riverine CO2 emission in an area of rapid urbanization is limited. In this study, we conducted field surveys in high time intervals to unravel the characterization of riverine partial pressure of CO2 (pCO2) and CO2 emission rates and their associations with C and nutrients. We found distinct variations in inter-/intra- daily and monthly pCO2. pCO2 and CO2 fluxes averaged 904–3157 µatm and 80–1137 mmol/m2/d, respectively, with significantly higher levels in the period with higher nutrients. Increasing organic carbon and nutrients loading sped up aqueous CO2 production as reflected by the strong relationships between pCO2 and dissolved organic carbon (DOC) and nitrogen and phosphorus. C and nutrients as indicators of pCO2 were further developed. We highlight that urbanization is potentially increasing eutrophication and shifting DOC quantity and quality, and the resulting changes in C geochemical process and CO2 areal fluxes will hamper the CO2 accurate estimation from global rivers. In view of the increasing intensive and extensive urbanization, the resulting changes in extent and magnitude to CO2 emission in the frame of regional or global C budgets warrant future work. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159810
Appears in Collections: 气候变化与战略
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作者单位: Research Center for Ecohydrology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China; Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resource, Environmental and Chemical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China; School of Renewable Natural Resources, Louisiana State University, Baton Rouge, LA 70803, United States; Coastal Studies Institute, Louisiana State University, Baton Rouge, LA 70803, United States
Recommended Citation:
Li S.,Luo J.,Wu D.,et al. Carbon and nutrients as indictors of daily fluctuations of pCO2 and CO2 flux in a river draining a rapidly urbanizing area[J]. Ecological Indicators,2020-01-01,109