The seasonal cycle of ocean-atmosphere CO2 Flux in Ryder Bay, West Antarctic Peninsula

Legge, Oliver J., Bakker, Dorothee C. E. ORCID:, Johnson, Martin T., Meredith, Mike P., Venables, Hugh J., Brown, Pete J. and Lee, Gareth A. ORCID: (2015) The seasonal cycle of ocean-atmosphere CO2 Flux in Ryder Bay, West Antarctic Peninsula. Geophysical Research Letters, 42 (8). pp. 2934-2942. ISSN 0094-8276

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Approximately 15 million km2 of the Southern Ocean is seasonally ice covered, yet the processes affecting carbon cycling and gas exchange in this climatically important region remain inadequately understood. Here, 3 years of dissolved inorganic carbon (DIC) measurements and carbon dioxide (CO2) fluxes from Ryder Bay on the west Antarctic Peninsula (WAP) are presented. During spring and summer, primary production in the surface ocean promotes atmospheric CO2 uptake. In winter, higher DIC, caused by net heterotrophy and vertical mixing with Circumpolar Deep Water, results in outgassing of CO2 from the ocean. Ryder Bay is found to be a net sink of atmospheric CO2 of 0.59–0.94 mol C m−2 yr−1 (average of 3 years). Seasonal sea ice cover increases the net annual CO2 uptake, but its effect on gas exchange remains poorly constrained. A reduction in sea ice on the WAP shelf may reduce the strength of the oceanic CO2 sink in this region.

Item Type: Article
Additional Information: ©2015. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Uncontrolled Keywords: ocean-atmosphere co2 flux,ryder bay,seasonal sea ice,polar time series,rats,carbon cycling,sdg 14 - life below water ,/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
Faculty \ School: Faculty of Science > School of Environmental Sciences
Faculty of Science
Depositing User: Pure Connector
Date Deposited: 24 Jul 2015 22:26
Last Modified: 20 Mar 2023 10:40
DOI: 10.1002/2015GL063796

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