DOI: 10.1002/gbc.20034
Scopus记录号: 2-s2.0-84881107136
论文题名: Amounts, isotopic character, and ages of organic and inorganic carbon exported from rivers to ocean margins: 2. Assessment of natural and anthropogenic controls
作者: Hossler K ; , Bauer J ; E
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 2 起始页码: 347
结束页码: 362
语种: 英语
英文关键词: anthropogenic controls
; DIC
; DOC
; natural controls
; POC
; river exports
Scopus关键词: Anthropogenic factors
; Anthropogenic impacts
; DIC
; Dissolved organic C
; DOC
; POC
; Potential control
; Wastewater treatment plants
; Environmental impact
; Land use
; Lithology
; Nuclear power plants
; Rivers
; International trade
; anthropogenic source
; carbon budget
; carbon flux
; carbon isotope
; carbonate
; continental margin
; dissolved inorganic carbon
; dissolved organic carbon
; estuarine front
; freshwater input
; geomorphology
; impoundment
; limestone
; lithology
; nuclear power plant
; particulate organic carbon
; particulate organic matter
; sewage treatment
; United States
英文摘要: Riverine exports of carbon (C) and organic matter (OM) are regulated by a variety of natural and anthropogenic factors. Understanding the relationships between these various factors and C and OM exports can help to constrain global C budgets and allow assessment of current and future anthropogenic impacts on both riverine and global C cycles. We quantified the effects of multiple natural and anthropogenic controls on riverine export fluxes and compositions of particulate organic C, dissolved organic C, and dissolved inorganic C for a regional group of eight rivers in the northeastern U.S. Potential controls related to hydrogeomorphology and regional climate, soil order, soil texture, bedrock lithology, land use, and anthropogenic factors were analyzed individually, collectively, and at scales of both local and regional influence. Factors related to hydrogeomorphology and climate, followed in importance by land use and anthropogenic factors, exhibited the strongest impacts on riverine C exports and compositions, particularly at smaller localized scales. The effects of hydrogeomorphology and climate were primarily related to volumetric flow, which resulted in greater exports of terrestrial and total C. Principal anthropogenic factors included impacts of wastewater treatment plants (WWTPs) and river impoundments. The presence of WWTPs as well as anthropogenic use of carbonate-based materials (e.g., limestone) may have substantially increased riverine C exports, particularly fossil C exports, in the study region. The presence of nuclear power plants in the associated watersheds is also discussed because of the potential for anthropogenic 14C inputs and subsequent biasing of aquatic C studies utilizing natural abundance 14C. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77618
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Aquatic Biogeochemistry Laboratory, Department of Evolution, Ecology and Organismal Biology, Ohio State University, 1314 Kinnear Rd., Columbus, OH 43212-1156, United States
Recommended Citation:
Hossler K,, Bauer J,E. Amounts, isotopic character, and ages of organic and inorganic carbon exported from rivers to ocean margins: 2. Assessment of natural and anthropogenic controls[J]. Global Biogeochemical Cycles,2013-01-01,27(2)