Articles | Volume 14, issue 23
Biogeosciences, 14, 5323–5342, 2017
https://doi.org/10.5194/bg-14-5323-2017

Special issue: GEOVIDE, an international GEOTRACES study along the OVIDE...

Biogeosciences, 14, 5323–5342, 2017
https://doi.org/10.5194/bg-14-5323-2017

Research article 29 Nov 2017

Research article | 29 Nov 2017

The GEOVIDE cruise in May–June 2014 reveals an intense Meridional Overturning Circulation over a cold and fresh subpolar North Atlantic

Patricia Zunino et al.

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Cited articles

Barrier, N., Deshayes, J., Treguier, A. M., and Cassou, C.: Heat budget in the North Atlantic subpolar gyre: Impacts of atmospheric weather regimes on the 1995 warming event, Prog. Oceanogr., 130, 75–90, https://doi.org/10.1016/j.pocean.2014.10.001, 2015.
Berrisford, P., Kallberg, P., Kobayashi, S., Dee, D., Uppala, S., Simmons, A. J., Poli, P., and Sato, H.: Atmospheric conservation properties in ERA-Interim, Q. J. R. Meteorol. Soc., 137, 1381–1399, https://doi.org/10.1002/qj.864, 2011.
Bersch, M.: North Atlantic Oscillation-induced changes of the upper layer circulation in the northern North Atlantic Ocean, J. Geophys. Res.-Ocean., 107, 1–11, https://doi.org/10.1029/2001JC000901, 2002
Bersch, M., Yashayaev, I., and Koltermann, K. P.: Recent changes of the thermohaline circulation in the subpolar North Atlantic, Ocean Dynam., 57, 223–235, https://doi.org/10.1007/s10236-007-0104-7, 2007.
Bower, A. S. and von Appen, W. J.: Interannual variability in the pathways of the North Atlantic current over the Mid-Atlantic Ridge and the impact of topography, J. Phys. Oceanogr., 38, 104–120, https://doi.org/10.1175/2007JPO3686.1, 2008.
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The heat content in the subpolar North Atlantic is in a new phase of long-term decrease from the mid-2000s, which intensified in 2013–2014. We focus on the pronounced heat content drop. In summer 2014, the MOC intensity was higher than the mean (2002–2012) and the heat transport was also relatively high. We show that the air–sea heat flux is responsible for most of the intense cooling. Concurrently, we observed freshwater content increase mainly explained by the air–sea freshwater flux.
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