Open ocean convection drives enhanced eastern pathway of the Glacial Atlantic Meridional Overturning Circulation.

ABSTRACT: Abundant proxy records suggest a profound reorganization of the Atlantic Meridional Overturning Circulation (AMOC) during the Last Glacial Maximum (LGM, ~21,000 y ago), with the North Atlantic Deep Water (NADW) shoaling significantly relative to the present-day (PD) and forming Glacial North Atlantic Intermediate Water (GNAIW). However, almost all previous observational and modeling studies have focused on the zonal mean two-dimensional AMOC feature, while recent progress in the understanding of modern AMOC reveals a more complicated three-dimensional structure, with NADW penetrating from the subpolar North Atlantic to lower latitude through different pathways. Here, combining ²³¹Pa/²³⁰Th reconstructions and model simulations, we uncover a significant change in the th

SUBMITTER: Gu S 

PROVIDER: S-EPMC11551322 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature