DOI: 10.1002/grl.50268
论文题名: Further observations of a decreasing atmospheric CO2 uptake capacity in the Canada Basin (Arctic Ocean) due to sea ice loss
作者: Else B.G.T. ; Galley R.J. ; Lansard B. ; Barber D.G. ; Brown K. ; Miller L.A. ; Mucci A. ; Papakyriakou T.N. ; Tremblay J.-É. ; Rysgaard S.
刊名: Geophysical Research Letters
ISSN: 0094-9240
EISSN: 1944-8971
出版年: 2013
卷: 40, 期: 6 起始页码: 1132
结束页码: 1137
语种: 英语
英文关键词: Arctic
; Canada Basin
; carbon cycling
; gas exchange
; pCO2
; sea ice
Scopus关键词: Arctic
; Canada basin
; Carbon cycling
; Gas exchange
; pCO<sub>2</sub>
; Sea ice
; Surface waters
; Carbon dioxide
; air-sea interaction
; biological uptake
; carbon cycle
; carbon dioxide
; data set
; gas exchange
; numerical model
; observational method
; sea ice
; surface water
; ventilation
; water temperature
; Arctic Ocean
; Canada Basin
英文摘要: Using data collected in 2009, we evaluated the potential for the southeastern Canada Basin (Arctic Ocean) to act as an atmospheric CO2 sink under the summertime ice-free conditions expected in the near future. Beneath a heavily decayed ice cover, we found surprisingly high pCO 2sw (~290-320 μatm), considering that surface water temperatures were low and the influence of ice melt was strong. A simple model simulating melt of the remaining ice and exposure of the surface water for 100 days revealed a weak capacity for atmospheric CO2 uptake (mean flux: -2.4 mmol m-2 d-1), due largely to warming of the shallow mixed layer. Our results confirm a previous finding that the Canada Basin is not a significant sink of atmospheric CO2 under summertime ice-free conditions and that increased ventilation of the surface mixed layer due to sea ice loss is weakening the sink even further. Key Points The southeastern Canada Basin has a weak capacity to absorb atmospheric CO2 A shallow mixed layer that warms rapidly after ice loss inhibits CO2 uptake Ice-free summers in the Canada Basin will not create a significant new CO2 sink. ©2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876905548&doi=10.1002%2fgrl.50268&partnerID=40&md5=dbabbf23af8a1a608e471b3fd238c946
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6504
Appears in Collections: 气候减缓与适应
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作者单位: CEOS, University of Manitoba, Winnipeg, MB, Canada
Recommended Citation:
Else B.G.T.,Galley R.J.,Lansard B.,et al. Further observations of a decreasing atmospheric CO2 uptake capacity in the Canada Basin (Arctic Ocean) due to sea ice loss[J]. Geophysical Research Letters,2013-01-01,40(6).