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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:54 |
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Conference: Bucharest University Faculty of Physics 2007 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Causes and consequences of the late 1960s Great Salinity Anomaly-invited lecture
Authors:
Mihai Dima(1), Gerrit Lohmann (2)
Affiliation:
1 - University of Bucharest, Faculty of Physics
Department of Atmospheric Physics
P.O. Box MG-11, Bucharest, Romania
2 - Alfred Wegener Institute for Polar and Marine Research
Bussestr. 24, D-27570 Bremerhaven, Germany
E-mail
mdima@rdslink.ro
Keywords:
salinity anomaly,termohaline circulation,climate
Abstract:
The Great Salinity Anomaly in late 1960s manifested in the North Atlantic as an excess of freshwater of about 2300 km3 and could affect the large-scale thermohaline circulation. It was suggested that this anomaly originates in the Arctic but its cause is not yet understood. We show that the late 1960s event results from synchronization of three climate modes with decadal and interdecadal timescales and present evidence that the Great Salinity Anomaly generates a shift of the thermohaline circulation in a weaker state. We argue that this is related to the significant climate shift in 1970s reported in world-wide locations, which is also observed in the Northern Hemisphere atmospheric circulation.
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