Ocean circulation Oceanography 2 Atlantic Ocean 1 Atlantic Ocean (North) 1 Atlantic Ocean (South) 1 Atlantic meridional overturning circulations 1 Atlantic ocean 1 Benthic foraminiferal δ13C 1 Biological productivity 1 Biology 1 Carbon isotopic composition 1 Climate change 1 Digital storage 1 Equations of motion 1 Eulerian 1 Geostrophic balance 1 Glacial geology 1 Grid-based 1 Isotopes 1 Iterative methods 1 Lagrange multipliers 1 Lagrangian 1 Marine isotope stages 1 Meridional gradients 1 Mid-Pleistocene transition 1 Nd isotopic composition 1 Neodymium 1 Neodymium isotopic composition 1 Northern Hemispheres 1 Numerical methods 1