Journal article Open Access

A sea change in our view of overturning in the subpolar North Atlantic

Lozier, S.; Li, F.; Bacon, S.; Bahr, F.; Bower, A.; Cunningham, S.; de Jong, F.; de Steur, L.; de Young, B.; Fischer, J.; Gary, S.; Greenan, B.; Holliday, N.; Houk, A.; Houpert, L.; Inall, M.; Johns, W.; Johnson, H.; Johnson, C.; Karstensen, J.; Koman, G.; Le Bras, I.; Lin, X.; Mackay, N.; Marshall, D.; Mercier, H.; Oltmanns, M.; Pickart, R.; Ramsey, A.; Rayner, D.; Straneo, F.; Thierry, V.; Torres, D.; Williams, R.; Wilson, C.; Yang, J.; Zhao, J.

To provide an observational basis for IPCC projections of a slowing Atlantic Meridional Overturning Circulation (MOC) in the 21st century, the Overturning in the Subpolar North Atlantic Program (OSNAP) observing system was launched in the summer of 2014. The first 21-month record reveals a highly variable overturning circulation responsible for the majority of the heat and freshwater transport across the OSNAP line. In a departure from the prevailing view that changes in deep water formation in the Labrador Sea dominate MOC variability, these results suggest that the conversion of warm, salty, shallow Atlantic waters into colder, fresher, deep waters that move southward in the Irminger and Iceland basins, is largely responsible for overturning and its variability in the subpolar basin.

Files (15.7 MB)
Name Size
lozier_ea_as_accepted.pdf
md5:44d5f8399ce9145d3584e87a5535b5a3
15.7 MB Download
16
14
views
downloads
Views 16
Downloads 14
Data volume 220.2 MB
Unique views 14
Unique downloads 14

Share

Cite as