Physics – Atmospheric and Oceanic Physics
Scientific paper
2011-01-21
Climate Dynamics, Volume 38, Issue 3 (2012), Page 745-760
Physics
Atmospheric and Oceanic Physics
The final publication is available at springerlink.com
Scientific paper
10.1007/s00382-011-1094-1
A global hybrid coupled model is developed, with the aim of studying the effects of ocean-atmosphere feedbacks on the stability of the Atlantic meridional overturning circulation. The model includes a global ocean general circulation model and a statistical atmosphere model. The statistical atmosphere model is based on linear regressions of data from a fully coupled climate model on sea surface temperature both locally and hemispherically averaged, being the footprint of Atlantic meridional overturning variability. It provides dynamic boundary conditions to the ocean model for heat, freshwater and wind-stress. A basic but consistent representation of ocean-atmosphere feedbacks is captured in the hybrid coupled model and it is more than ten times faster than the fully coupled climate model. The hybrid coupled model reaches a steady state with a climate close to the one of the fully coupled climate model, and the two models also have a similar response (collapse) of the Atlantic meridional overturning circulation to a freshwater hosing applied in the northern North Atlantic.
Cimatoribus Andrea A.
Dijkstra Henk A.
Drijfhout Sybren S.
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