Other
Scientific paper
Nov 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3422706w&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 22, CiteID L22706
Other
8
Global Change: Oceans (1616, 3305, 4215, 4513), Paleoceanography: Glacial, Global Change: Abrupt/Rapid Climate Change (4901, 8408), Global Change: Global Climate Models (3337, 4928)
Scientific paper
The stability of the glacial Atlantic Meridional Overturning Circulation is examined using a coupled model of intermediate complexity. Two slightly different climatic states are generated. One has a southward overturning freshwater transport at the southern border of the Atlantic basin, the other a northward transport. Pulse experiments with varying magnitude always result in a collapsed circulation in case of a southward transport, while the overturning recovers in case of a northward transport. In the latter case recovery is due to a positive salinity-overturning feedback, which strengthens the remnant circulation cell that exists in the `collapsed' state. This is amplified by advection by wind-driven currents and a southward ITCZ shift. The glacial circulation is more easily perturbed than the modern and restoring timescales are considerably longer, matching the duration of Heinrich events.
Drijfhout Sybren S.
Weber Susanne L.
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