Fig. 3: Schematic north-south transect of the abrupt Atlantic Meridional Overturning Circulation (AMOC) slowdown during the last glacial inception (LGI) and its potential causes and impact.
From: Abrupt weakening of deep Atlantic circulation at the last glacial inception
The numbers mark the corresponding Proposals 1 (North Atlantic sea ice), 2 (Southern Ocean sea ice), and 3 (Antarctic iceberg) of AMOC slowdown during the LGI. As a result, the upper overturning cell weakens, and the lower cell sequesters a greater amount of dissolved inorganic carbon due to increased respired carbon accumulation and/or northward Antarctic Bottom Water expansion, leading to the inception of atmospheric CO2 drawdown after the last interglacial.
