Observation?Based Estimates of Eulerian?Mean Boundary Downwelling in the Western Subpolar North Atlantic
نویسندگان
چکیده
A significant fraction of the Eulerian-mean downwelling feeding lower limb Atlantic Meridional Overturning Circulation (AMOC) occurs along subpolar North continental slopes and is maintained by along-boundary densification large-scale geostrophic balance. We here use Argo shipboard hydrography data to map 2002–2015 long-term mean density field boundary via a dedicated optimal interpolation tool. The overall downstream implies an 2.12 ± 0.43 Sv at 1100 m depth between Denmark Strait Flemish Cap. clear regional pattern emerges with in Irminger Sea western Labrador upwelling Greenland slope. Comparisons independent cross-basin estimates confirm that vertical overturning transport across marginal seas mainly slopes, suggest usefulness hydrographic providing quantitative information about sinking branch AMOC.
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2022
ISSN: ['1944-8007', '0094-8276']
DOI: https://doi.org/10.1029/2021gl097243