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SEA-ICE AND ATMOSPHERIC CIRCULATION ANOMALIES IN THE LABRADOR SEA REGION ASSOCIATED WITH EXTREMES OF THE SOUTHERN OSCILLATION

✍ Scribed by NEWELL, JOHN P.

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
741 KB
Volume
16
Category
Article
ISSN
0899-8418

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✦ Synopsis

This study has identified a link between sea-ice clearing dates off the coast of Labrador and the Southern Oscillation. In recent decades low values of the Southern Oscillation Index (SOI) during the September to May period are associated with earlier than normal sea-ice clearing dates in the western Labrador Sea. Conversely, high values of the SO1 during the same period lead to later clearing dates. It is proposed that this relationship is a result of the SO1 influencing sea-level pressure patterns over the north-west Atlantic which subsequently influence sea-ice clearing dates off Labrador.

Analysis of data for 1882-1993 demonstrates that the relationship between the SO1 and Labrador clearing dates has varied from the positive relationship described above to a negative relationship in the early decades of this century. It is proposed that these changes are linked to changes in pressure patterns over the North Atlantic and specifically to changes in the mean pressure over southern Greenland.

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