“Great Salinity Anomalies” in a coupled climate model

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Abstract

[1] Several “Great Salinity Anomalies” have been observed to propagate around the North Atlantic sub-polar gyre over the past 40 years. These could be a response to global warming, or part of the natural variability of the climate system. Here, we find “Great Salinity Anomalies” in the HadCM3 coupled climate simulation of pre-industrial climate, suggesting they are not a response to recent climatic change. In concurrence with observed events, the HadCM3 simulation produces events which originate in both the Greenland and Labrador Seas.

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