Propagation of the ``Great Salinity Anomaly'' of the 1990s around the northern North Atlantic

Details Propagation of the ``Great Salinity Anomaly'' of the 1990s around the northern North Atlantic Propagation of the ``Great Salinity Anomaly'' of the 1990s around the northern North Atlantic

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3108306b&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 8, CiteID L08306

Physics

31

Oceanography: General: Climate And Interannual Variability (3309), Oceanography: General: Descriptive And Regional Oceanography, Oceanography: Physical: Currents, Oceanography: Physical: General Circulation, Oceanography: Physical: Upper Ocean Processes

Scientific paper

Time series of T and S extending through 2001 are used to describe propagation of the ``Great Salinity Anomaly'' of the 1990s (GSA'90s). Comparison of the distance-time relations for the GSA'70s, '80s, and '90s reveals a substantial intensification of the large-scale circulation in the northern North Atlantic, especially in the Subarctic Gyre between Newfoundland and the Faroes. The advection rate of the GSA'70s, '80s, and '90s between Newfoundland and the Faroe-Shetland Channel is conservatively estimated to have been 3.5, 10, and 10 cm/s, respectively. The circulation intensification apparently occurred within a decade between the GSA'70s and '80s. During the next decade the advection rate increased from 10 to 13 cm/s between Newfoundland and Iceland Basin. The GSA'90s was advected towards the Faroe-Shetland Channel by the northern (Iceland Basin's) branch of the North Atlantic Current, whereas the contribution of the southern branch via the Rockall Trough was minimal.

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