Mesoscale modulation of air-sea CO2 flux in Drake Passage Song, Hajoon Marshall, John Munro, David R. Dutkiewicz, Stephanie Sweeney, Colm McGillicuddy, Dennis J. Hausmann, Ute 2016-12-06T20:31:22Z 2017-03-10T10:02:11Z 2016-09-10
dc.description Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 121 (2016): 6635–6649, doi:10.1002/2016JC011714. en_US
dc.description.abstract We investigate the role of mesoscale eddies in modulating air-sea CO2 flux and associated biogeochemical fields in Drake Passage using in situ observations and an eddy-resolving numerical model. Both observations and model show a negative correlation between temperature and partial pressure of CO2 (pCO2) anomalies at the sea surface in austral summer, indicating that warm/cold anticyclonic/cyclonic eddies take up more/less CO2. In austral winter, in contrast, relationships are reversed: warm/cold anticyclonic/cyclonic eddies are characterized by a positive/negative pCO2 anomaly and more/less CO2 outgassing. It is argued that DIC-driven effects on pCO2 are greater than temperature effects in austral summer, leading to a negative correlation. In austral winter, however, the reverse is true. An eddy-centric analysis of the model solution reveals that nitrate and iron respond differently to the same vertical mixing: vertical mixing has a greater impact on iron because its normalized vertical gradient at the base of the surface mixed layer is an order of magnitude greater than that of nitrate. en_US
dc.description.embargo 2017-03-10 en_US
dc.description.sponsorship NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center Grant Number: SMD-15-5752; NSF MOBY project Grant Numbers: (OCE-1048926), OCE-1259388, PLR-1341647, AOAS-0944761, and AOAS-066975; NOAA Climate Program Office Grant Number: (NA12OAR4310058) en_US
dc.identifier.citation Journal of Geophysical Research: Oceans 121 (2016): 6635–6649 en_US
dc.identifier.doi 10.1002/2016JC011714
dc.language.iso en_US en_US
dc.publisher John Wiley & Sons en_US
dc.subject CO2 flux en_US
dc.subject Mesoscale eddy en_US
dc.subject Southern Ocean en_US
dc.subject Vertical mixing en_US
dc.subject Nutrient fluxes en_US
dc.title Mesoscale modulation of air-sea CO2 flux in Drake Passage en_US
dc.type Article en_US
dspace.entity.type Publication
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