DOI: 10.1002/2016GL067732
论文题名: Exogenously produced CO2 doubles the CO2 efflux from three north temperate lakes
作者: Wilkinson G.M. ; Buelo C.D. ; Cole J.J. ; Pace M.L.
刊名: Geophysical Research Letters
ISSN: 0094-9307
EISSN: 1944-9038
出版年: 2016
卷: 43, 期: 5 起始页码: 1996
结束页码: 2003
语种: 英语
英文关键词: carbon dioxide
; exogenous carbon
; lakes
Scopus关键词: Lakes
; Nutrients
; Organic carbon
; Carbon source
; Exogenous source
; High frequency HF
; Hydrologic regime
; Keypoints
; Net ecosystem production
; Nutrient loading
; Temperate lakes
; Carbon dioxide
英文摘要: It is well established that lakes are typically sources of CO2 to the atmosphere. However, it remains unclear what portion of CO2 efflux is from endogenously processed organic carbon or from exogenously produced CO2 transported into lakes. We estimated high-frequency CO2 and O2 efflux from three north temperate lakes in summer to determine the proportion of the total CO2 efflux that was exogenously produced. Two of the lakes were amended with nutrients to experimentally enhance endogenous CO2 uptake. In the unfertilized lake, 50% of CO2 efflux was from exogenous sources and hydrology had a large influence on efflux. In the fertilized lakes, endogenous CO2 efflux was negative (into the lake) yet exogenous CO2 made the lakes net sources of CO2 to the atmosphere. Shifts in hydrologic regimes and nutrient loading have the potential to change whether small lakes act primarily as reactors or vents in the watershed. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959531829&doi=10.1002%2f2016GL067732&partnerID=40&md5=07176fe0e3916ca0e3f02dc8fe5ae496
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10270
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia, United States
Recommended Citation:
Wilkinson G.M.,Buelo C.D.,Cole J.J.,et al. Exogenously produced CO2 doubles the CO2 efflux from three north temperate lakes[J]. Geophysical Research Letters,2016-01-01,43(5).