Fig. 3: Winter mixed layer depth (MLD) and meridional overturning stream function.

a MLD during austral winter (June to August) in PI, (b) LIG and (c) LIG-PI, and (d) global stream function in PI, (e) LIG and (f) LIG-PI. A paleo-calendar adjustment is applied to the LIG data in (b) and (c) such that its months have the same angular definition as PI as described in Bartlein and Shafer68.