oceanic circulation Calcareous nannoplankton 1 Climate change 1 Climate state 1 Earth (planet) 1 Earth's climate 1 Indian Ocean 1 Indian Ocean (East) 1 Indian ocean 1 Leeuwin Current 1 Leeuwin current 1 Middle Pleistocene 1 Middle pleistocene transition 1 Nutrients 1 Orbital forcing 1 Orbits 1 Organic carbon 1 Organic carbon burial 1 Pleistocene 1 Primary productivity 1 Sea level 1 Surface waters 1 circulation modeling 1 deglaciation 1 glacial-interglacial cycle 1 inorganic carbon 1 marine isotope stage 1 orbital forcing 1 organic carbon 1 surface water 1