Impact of North Atlantic - GIN Sea exchange on deglaciation evolution of the Atlantic Meridional Overturning Circulation

• Published in: Climate of the Past
• Main Authors: Cheng, J., Liu, Z., He, F., Otto-Bliesner, B. L., Colose, C.
• Other Authors: Cheng, J (reprint author), Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Nanjing 210044, Peoples R China., Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Nanjing 210044, Peoples R China., Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing 210044, Peoples R China., Univ Wisconsin, Ctr Climat Res, Madison, WI 53706 USA., Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI 53706 USA., Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Lab Climate & Ocean Atmosphere Studies, Beijing 100871, Peoples R China., Natl Ctr Atmospher Res, Climate & Global Dynam Div, Boulder, CO 80307 USA., SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA.
• Format: Journal/Newspaper
• Language: English
• Published: climate of the past 2011
• Subjects: CLIMATE SYSTEM MODEL; THERMOHALINE CIRCULATION; VERSION-3 CCSM3; DEEP CONVECTION; VARIABILITY; OCEAN; SIMULATION; MECHANISM; COLLAPSE; RECOVERY; North Atlantic
• Online Access: https://hdl.handle.net/20.500.11897/395702; https://doi.org/10.5194/cp-7-935-2011

In a transient simulation of the last deglaciation with a fully coupled model (TraCE-21000), an overshoot of the Atlantic Meridional Overturning Circulation (AMOC) is simulated and proposed as a key factor for the onset of the Bolling-Allerod (BA) warming event. There is collaborating evidence for an AMOC overshoot at the BA in various proxy reconstructions although the mechanism governing its behavior is not well understood. Here, we present two new sensitivity experiments to explicitly illustrate the impact of North Atlantic - GIN Sea exchange on the AMOC's deglacial evolution. Results show that this oceanic exchange dominates the convection restarting in the GIN Sea, the occurrence of the AMOC overshoot, and the full BA warming. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000295356800016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 Geosciences, Multidisciplinary Meteorology & Atmospheric Sciences SCI(E) 3 ARTICLE 3 935-940 7