A two-phase response of the Southern Ocean to an increase in greenhouse gas concentrations

Details A two-phase response of the Southern Ocean to an increase in greenhouse gas concentrations A two-phase response of the Southern Ocean to an increase in greenhouse gas concentrations

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3469g&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 18, p. 3469-3472

Physics

18

Global Change: Climate Dynamics, Oceanography: General: Arctic And Antarctic Oceanography, Oceanography: Physical: Air/Sea Interactions

Scientific paper

The response of the Southern Ocean to an increase in atmospheric greenhouse gas concentrations simulated by a global atmosphere-ocean-sea-ice model can be decomposed in two different phases. Firstly, the ocean damps the surface warming because of its large heat capacity. Secondly, one century after the major increase in greenhouse gases, the warming is amplified because of a positive feedback that is associated with a stronger oceanic meridional heat transport toward the Southern Ocean. Consequently, the long-term decrease in ice area in the Southern Ocean is much larger than in the Northern Hemisphere. This large but delayed response has consequences for the interpretation of both observations and model results.

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