Bauch, H. A., Kandiano, E. S. & Helmke, J. P. Contrasting ocean changes
between the subpolar and polar North Atlantic during the past 135 ka.
Fig. 3 Time series of the temperature difference
between the subpolar North Atlantic and the entire northern hemisphere, which can be interpreted as an indicator of the strength of the Atlantic circulation.
Both processes act to tighten the relation
between subpolar surface heat flux variability and MOC - variability, resulting in a poleward shift of the latter.
Not exact matches
Measure of the pressure gradient
between the polar and
subpolar regions of the Northern Hemisphere.
The shift is associated with a stronger relation
between MOC - variations and heat flux variations over the
subpolar gyre.
The strength of the Icelandic Low is the critical factor in determining path of the polar jet stream over the North Atlantic In the winter the IL is located at SW of Greenland (driver
Subpolar Gyre), but in the summer the IL is to be found much further north (most likely driver the North Icelandic Jet, formed by complex physical interactions
between warm and cold currents), which as graphs show had no major ups or downs.
The strength of the Icelandic Low is the critical factor in determining path of the polar jet stream over the North Atlantic In the winter the IL is located at SW of Greenland (
Subpolar Gyre) In summer the IL is to be found much further north (most likely the North Icelandic Jet, formed by complex physical interactions
between warm and cold currents) These two run under two different regimes and two clocks (see the CET synthesis from 3 harmonics, one for each summer and winter, and one common — see the above link, bottom graph).
Characterize and investigate coherence within the
subpolar and subtropical gyres, communication
between the gyres, and communication of changes across the equator to the South Atlantic.
The flow of freshwater from the northern continents represents an export to the world ocean that goes almost entirely into the Atlantic, about 5.1 Sv passing as relatively low salinity water through the passages
between Greenland and Ellesmere Island into the Labrador Sea, a flow of low salinity water that can subsequently be traced around the
subpolar gyre.
As a result, the fast and slow responses are nearly opposite to each other in spatial pattern, especially over the
subpolar North Atlantic / Southern Ocean regions of the deep - water / bottom - water formation, and in the interhemispheric SST gradient
between the southern and northern subtropics.