Post by missouriboy on Jun 15, 2021 15:04:58 GMT
The Beaufort Gyre and its Circulation Patterns
This is protected from me by a paywall, but here is the abstract.
The event disscussed in this article is supposedly due to accumulation of fresh water in the Arctic and periodic flushing as the Beaufort gyre reverses circulation. The dates of this event coincide with the last low point in the AMO. If related, then fresher cold waters would have to make their way fairly far south.
The “great salinity anomaly” in the Northern North Atlantic 1968–1982
www.sciencedirect.com/science/article/abs/pii/0079661188900493
Author links open overlay panelRobert Rthingyson∗JensMeincke∗∗Svend-AageMalmberg†Arthur JLee‡
doi.org/10.1016/0079-6611(88)90049-3Get rights and content
Abstract
The widespread freshening of the upper 500–800m layer of the northern North Atlantic, which this paper describes, represents one of the most persistent and extreme variations in global ocean climate yet observed in this century.
Though a range of explanations have been advanced to explain this event, including in situ changes in the surface moisture flux, this paper describes the Great Salinity Anomaly as largely (though not entirely) an advective event, traceable around the Atlantic subpolar gyre for over 14 years from its origins north of Iceland in the mid-to-late 1960s until its return to the Greenland Sea in 1981–1982. The overall propagation speed around this subpolar gyre is estimated at about 3cm s−1. Of the total salt deficit associated with the anomaly as it passed south along the Labrador Coast in 1971–1973 (about 72 × 109 tonnes), a deficit equivalent to about two thirds of this figure (47 × 109 tonnes) ultimately passed through the Faroe-Shetland Channel to the Barents Sea, Arctic Ocean and Greenland Sea during the mid-1970s.
Possible effects on deep water formation and on the representativeness of historical section data are discussed.
The Beaufort gyre is also the subject of this paper ...
e360.yale.edu/features/how-a-wayward-arctic-current-could-cool-the-climate-in-europe
This is protected from me by a paywall, but here is the abstract.
The event disscussed in this article is supposedly due to accumulation of fresh water in the Arctic and periodic flushing as the Beaufort gyre reverses circulation. The dates of this event coincide with the last low point in the AMO. If related, then fresher cold waters would have to make their way fairly far south.
The “great salinity anomaly” in the Northern North Atlantic 1968–1982
www.sciencedirect.com/science/article/abs/pii/0079661188900493
Author links open overlay panelRobert Rthingyson∗JensMeincke∗∗Svend-AageMalmberg†Arthur JLee‡
doi.org/10.1016/0079-6611(88)90049-3Get rights and content
Abstract
The widespread freshening of the upper 500–800m layer of the northern North Atlantic, which this paper describes, represents one of the most persistent and extreme variations in global ocean climate yet observed in this century.
Though a range of explanations have been advanced to explain this event, including in situ changes in the surface moisture flux, this paper describes the Great Salinity Anomaly as largely (though not entirely) an advective event, traceable around the Atlantic subpolar gyre for over 14 years from its origins north of Iceland in the mid-to-late 1960s until its return to the Greenland Sea in 1981–1982. The overall propagation speed around this subpolar gyre is estimated at about 3cm s−1. Of the total salt deficit associated with the anomaly as it passed south along the Labrador Coast in 1971–1973 (about 72 × 109 tonnes), a deficit equivalent to about two thirds of this figure (47 × 109 tonnes) ultimately passed through the Faroe-Shetland Channel to the Barents Sea, Arctic Ocean and Greenland Sea during the mid-1970s.
Possible effects on deep water formation and on the representativeness of historical section data are discussed.
The Beaufort gyre is also the subject of this paper ...
e360.yale.edu/features/how-a-wayward-arctic-current-could-cool-the-climate-in-europe