title: Timing and nature of AMOC recovery across Termination 2 and magnitude of deglacial CO2change.
abstract: Large amplitude variations in atmospheric CO2were associated with glacial terminations of the Late Pleistocene. Here we provide multiple lines of evidence suggesting that the ∼20 p.p.m.v. overshoot in CO2at the end of Termination 2 (T2) ∼129 ka was associated with an abrupt (≤400 year) deepening of Atlantic Meridional Overturning Circulation (AMOC). In contrast to Termination 1 (T1), which was interrupted by the Bølling-Allerød (B-A), AMOC recovery did not occur until the very end of T2, and was characterized by pronounced formation of deep waters in the NW Atlantic. Considering the variable influences of ocean circulation change on atmospheric CO2, we suggest that the net change in CO2across the last 2 terminations was approximately equal if the transient effects of deglacial oscillations in ocean circulation are taken into account.
authors.affiliation: School of Earth and Ocean Sciences, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK.
authors.forename: Emily L
authors.initials: EL
authors.lastname: Deaney
authors.affiliation: School of Earth and Ocean Sciences, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK.
authors.forename: Stephen
authors.initials: S
authors.lastname: Barker
authors.affiliation: Department of Earth Science and Engineering, South Kensington Campus, Imperial College London, London SW7 2AZ, UK.
authors.forename: Tina
authors.initials: T
authors.lastname: van de Flierdt