DOI: 10.1002/2013GB004736
Scopus记录号: 2-s2.0-85027956883
论文题名: Net ecosystem production and organic carbon balance of U.S. East Coast estuaries: A synthesis approach
作者: Herrmann M ; , Najjar R ; G ; , Kemp W ; M ; , Alexander R ; B ; , Boyer E ; W ; , Cai W ; -J ; , Griffith P ; C ; , Kroeger K ; D ; , McCallister S ; L ; , Smith R ; A
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 1 起始页码: 96
结束页码: 111
语种: 英语
英文关键词: coastal carbon cycle
; coastal carbon synthesis
; estuarine metabolism
; estuarine net community production
; estuarine net ecosystem production
; total organic carbon
Scopus关键词: carbon balance
; carbon cycle
; continental shelf
; estuarine chemistry
; estuarine ecosystem
; net ecosystem production
; organic carbon
; total organic carbon
; Atlantic Coast [North America]
; Atlantic Coast [United States]
; United States
英文摘要: Net ecosystem production (NEP) and the overall organic carbon budget for the estuaries along the East Coast of the United States are estimated. We focus on the open estuarine waters, excluding the fringing wetlands. We developed empirical models relating NEP to loading ratios of dissolved inorganic nitrogen to total organic carbon, and carbon burial in the sediment to estuarine water residence time and total nitrogen input across the landward boundary. Output from a data-constrained water quality model was used to estimate inputs of total nitrogen and organic carbon to the estuaries across the landward boundary, including fluvial and tidal-wetland sources. Organic carbon export from the estuaries to the continental shelf was computed by difference, assuming steady state. Uncertainties in the budget were estimated by allowing uncertainties in the supporting model relations. Collectively, U.S. East Coast estuaries are net heterotrophic, with the area-integrated NEP of -1.5 (-2.8, -1.0) Tg C yr-1 (best estimate and 95% confidence interval) and area-normalized NEP of -3.2 (-6.1, -2.3) mol C m-2 yr-1. East Coast estuaries serve as a source of organic carbon to the shelf, exporting 3.4 (2.0, 4.3) Tg C yr-1 or 7.6 (4.4, 9.5) mol C m-2 yr-1. Organic carbon inputs from fluvial and tidal-wetland sources for the region are estimated at 5.4 (4.6, 6.5) Tg C yr-1 or 12 (10, 14) mol C m-2 yr-1 and carbon burial in the open estuarine waters at 0.50 (0.33, 0.78) Tg C yr-1 or 1.1 (0.73, 1.7) mol C m-2 yr-1. Our results highlight the importance of estuarine systems in the overall coastal budget of organic carbon, suggesting that in the aggregate, U.S. East Coast estuaries assimilate (via respiration and burial) ~40% of organic carbon inputs from fluvial and tidal-wetland sources and allow ~60% to be exported to the shelf. © 2014. 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/78025
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Meteorology, Pennsylvania State University, University Park, PA, United States; Horn Point Laboratory, University of Maryland, Center for Environmental Science, Cambridge, MD, United States; USGS, National Water Quality Assessment Program, Reston, VA, United States; Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, United States; School of Marine Science and Policy, University of Delaware, Newark, DE, United States; Carbon Cycle and Ecosystems Office, Sigma Space/NASA GSFC, Greenbelt, MD, United States; USGS, Woods Hole Coastal and Marine Science Center, Woods Hole, MA, United States; Department of Biology, Virginia Commonwealth University, Richmond, VA, United States
Recommended Citation:
Herrmann M,, Najjar R,G,et al. Net ecosystem production and organic carbon balance of U.S. East Coast estuaries: A synthesis approach[J]. Global Biogeochemical Cycles,2015-01-01,29(1)