The impact of the North Atlantic Oscillation on the uptake and accumulation of anthropogenic CO2 by North Atlantic Ocean mode waters


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dc.contributor.author Levine, Naomi M.
dc.contributor.author Doney, Scott C.
dc.contributor.author Lima, Ivan D.
dc.contributor.author Wanninkhof, Rik
dc.contributor.author Bates, Nicholas R.
dc.contributor.author Feely, Richard A.
dc.date.accessioned 2011-10-19T14:25:35Z
dc.date.available 2012-03-21T08:33:01Z
dc.date.issued 2011-09-21
dc.identifier.citation Global Biogeochemical Cycles 25 (2011): GB3022 en_US
dc.identifier.uri http://hdl.handle.net/1912/4857
dc.description Author Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 25 (2011): GB3022, doi:10.1029/2010GB003892. en_US
dc.description.abstract The North Atlantic Ocean accounts for about 25% of the global oceanic anthropogenic carbon sink. This basin experiences significant interannual variability primarily driven by the North Atlantic Oscillation (NAO). A suite of biogeochemical model simulations is used to analyze the impact of interannual variability on the uptake and storage of contemporary and anthropogenic carbon (Canthro) in the North Atlantic Ocean. Greater winter mixing during positive NAO years results in increased mode water formation and subsequent increases in subtropical and subpolar Canthro inventories. Our analysis suggests that changes in mode water Canthro inventories are primarily due to changes in water mass volumes driven by variations in water mass transformation rates rather than local air-sea CO2 exchange. This suggests that a significant portion of anthropogenic carbon found in the ocean interior may be derived from surface waters advected into water formation regions rather than from local gas exchange. Therefore, changes in climate modes, such as the NAO, may alter the residence time of anthropogenic carbon in the ocean by altering the rate of water mass transformation. In addition, interannual variability in Canthro storage increases the difficulty of Canthro detection and attribution through hydrographic observations, which are limited by sparse sampling of subsurface waters in time and space. en_US
dc.description.sponsorship We would like to acknowledge funding from the NOAA Climate Program under the Office of Climate Observations and Global Carbon Cycle Program (NOAA‐NA07OAR4310098), NSF (OCE‐0623034), NCAR, the WHOI Ocean Climate Institute, a National Defense Science and Engineering Graduate Fellowship and an Environmental Protection Agency STAR graduate fellowship. NCAR is sponsored by the National Science Foundation. en_US
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dc.format.mimetype text/plain
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dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2010GB003892
dc.subject North Atlantic Oscillation en_US
dc.subject Anthropogenic carbon en_US
dc.subject Carbon cycle en_US
dc.subject Climate change en_US
dc.subject Global climate model en_US
dc.subject Mode waters en_US
dc.title The impact of the North Atlantic Oscillation on the uptake and accumulation of anthropogenic CO2 by North Atlantic Ocean mode waters en_US
dc.type Article en_US
dc.identifier.doi 10.1029/2010GB003892

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