globalchange  > 气候变化事实与影响
DOI: 10.1002/gbc.20032
Scopus记录号: 2-s2.0-84881085440
论文题名:
Inorganic carbon loading as a primary driver of dissolved carbon dioxide concentrations in the lakes and reservoirs of the contiguous United States
作者: McDonald C; P; , Stets E; G; , Striegl R; G; , Butman D
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期:2
起始页码: 285
结束页码: 295
语种: 英语
英文关键词: Air-water CO2 flux ; CO2 supersaturation ; Dissolved inorganic carbon (DIC) ; Net ecosystem productivity (NEP)
Scopus关键词: Accurate quantifications ; Air-water ; Comprehensive analysis ; Dissolved carbon dioxide ; Dissolved inorganic carbon ; Dissolved organic carbon ; Net ecosystem productivities ; Organic carbon loading ; Air ; Carbon ; Carbon dioxide ; Dissolution ; Lakes ; Reservoirs (water) ; Loading ; air-water interaction ; biogeochemistry ; carbon budget ; carbon dioxide ; carbon flux ; concentration (composition) ; dissolved organic carbon ; inorganic carbon ; lake water ; net ecosystem production ; reservoir ; supersaturation ; United States
英文摘要: Accurate quantification of CO2 flux across the air-water interface and identification of the mechanisms driving CO2 concentrations in lakes and reservoirs is critical to integrating aquatic systems into large-scale carbon budgets, and to predicting the response of these systems to changes in climate or terrestrial carbon cycling. Large-scale estimates of the role of lakes and reservoirs in the carbon cycle, however, typically must rely on aggregation of spatially and temporally inconsistent data from disparate sources. We performed a spatially comprehensive analysis of CO2 concentration and air-water fluxes in lakes and reservoirs of the contiguous United States using large, consistent data sets, and modeled the relative contribution of inorganic and organic carbon loading to vertical CO2 fluxes. Approximately 70% of lakes and reservoirs are supersaturated with respect to the atmosphere during the summer (June-September). Although there is considerable interregional and intraregional variability, lakes and reservoirs represent a net source of CO2 to the atmosphere of approximately 40 Gg C d-1 during the summer. While in-lake CO2 concentrations correlate with indicators of in-lake net ecosystem productivity, virtually no relationship exists between dissolved organic carbon and pCO2,aq. Modeling suggests that hydrologic dissolved inorganic carbon supports pCO2,aq in most supersaturated systems (to the extent that 12% of supersaturated systems simultaneously exhibit positive net ecosystem productivity), and also supports primary production in most CO2-undersaturated systems. Dissolved inorganic carbon loading appears to be an important determinant of CO2 concentrations and fluxes across the air-water interface in the majority of lakes and reservoirs in the contiguous United States. ©2013. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77605
Appears in Collections:气候变化事实与影响

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作者单位: U.S. Geological Survey, Boulder, CO, United States; Yale University, New Haven, CT, United States; Wisconsin Department of Natural Resources, Madison, WI 53716, United States

Recommended Citation:
McDonald C,P,, Stets E,et al. Inorganic carbon loading as a primary driver of dissolved carbon dioxide concentrations in the lakes and reservoirs of the contiguous United States[J]. Global Biogeochemical Cycles,2013-01-01,27(2)
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