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Detailed Reference Information |
DeGrandpre, M.D., Körtzinger, A., Send, U., Wallace, D.W.R. and Bellerby, R.G.J. (2006). Uptake and sequestration of atmospheric CO2 in the Labrador Sea deep convection region. Geophysical Research Letters 33: doi: 10.1029/2006GL026881. issn: 0094-8276. |
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The Labrador Sea is an important area of deep water formation and is hypothesized to be a significant sink for atmospheric CO2 to the deep ocean. Here we examine the dynamics of the CO2 system in the Labrador Sea using time-series data obtained from instrumentation deployed on a mooring near the former Ocean Weather Station Bravo. A 1-D model is used to determine the air-sea CO2 uptake and penetration of the CO2 into intermediate waters. The results support that mixed-layer pCO2 remained undersaturated throughout most of the year, ranging from 220 ¿atm in mid-summer to 375 ¿atm in the late spring. Net community production in the summer offset the increase in pCO2 expected from heating and air-sea uptake. In the fall and winter, cooling counterbalanced a predicted increase in pCO2 from vertical convection and air-sea uptake. The predicted annual mean air to sea flux was 4.6 mol m-2 yr-1 resulting in an annual uptake of 0.011 ¿ 0.005 Pg C from the atmosphere within the convection region. In 2001, approximately half of the atmospheric CO2 penetrated below 500 m due to deep convection. |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Biogeosciences, Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912), Oceanography, Biological and Chemical, Carbon cycling, Oceanography, Biological and Chemical, Gases, Oceanography, Biological and Chemical, Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4912), Oceanography, Biological and Chemical, Instruments, sensors, and techniques |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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