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A Persistent Deep Anticyclonic Vortex in the Rockall Trough Sustained by Anticyclonic Vortices Shed From the Slope Current and Wintertime Convection ArchiMer
Smilenova, Angelina; Gula, Jonathan; Le Corre, Mathieu; Houpert, Loïc; Reecht, Yves.
Tipo: Text Palavras-chave: Mesoscale eddy; Eddy merger; Instability; Potential vorticity transformations; Topographic effects; Water masses mixing; Rockall Trough.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00655/76734/77881.pdf
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Mesoscale modulation of air-sea CO2 flux in Drake Passage ArchiMer
Song, Hajoon; Marshall, John; Munro, David R.; Dutkiewicz, Stephanie; Sweeney, Colm; Mcgillicuddy, D. J., Jr.; Hausmann, Ute.
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 (pCO(2)) 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 pCO(2) anomaly and more/less CO2 outgassing. It is argued that DIC-driven effects on pCO(2) are greater than temperature effects in austral summer, leading to a negative correlation. In...
Tipo: Text Palavras-chave: CO2 flux; Mesoscale eddy; Southern Ocean; Vertical mixing; Nutrient fluxes.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00383/49407/49894.pdf
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