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16.05.2022: Ocean Circulation and Climate Dynamics Colloquium
Dr Feili Li, Xiamen University: "Observation-based estimates of heat and freshwater exchanges from the subtropical North Atlantic to the Arctic"
When? Monday, 16. Mai 2022 at 11 am
Where? ZOOM meeting room: https://geomar-de.zoom.us/j/84866501257?pwd=NTdNQWN5MXlhbHFnay8yV0JmWThsZz09
Meeting-ID: 848 6650 1257
Kenncode: 146581
We would like to inform you that this seminar will be recorded.
We will only record the presentation without the Q&A part.
Continuous measurements from the OSNAP (Overturning in the Subpolar North Atlantic Program) array yield the first estimates of trans-basin heat and salinity transports in the subpolar latitudes. The observations (2014-2018) show a poleward heat transport of 0.50 ± 0.05 PW with a salinity transport of 12.5 ± 1.0 Sv across the OSNAP section. Based on the mass and salt budget analyses, we estimate that a surface freshwater input of 0.36 ± 0.05 Sv over the broad subpolar-Arctic region is needed to balance the ocean salinity change created by the OSNAP transports. We then discuss differences in the magnitude and variability of those transports in the subpolar basins, and assess the contribution from different circulation components. Combined with trans-basin transport estimates at other locations, we provide new estimates for the time-mean surface heat and freshwater divergences over a wide domain of the Arctic-North Atlantic region to the north and south of the OSNAP line.
