CC007
Drivers of the Mid-Pleistocene Transition: the North Atlantic and Beyond
Session ID#: 253941
Session Description:
The Mid-Pleistocene Transition (MPT; ~1.25 to 0.7 Myr) marks a critical reorganisation of the Earth’s climate system characterised by a shift from 41 kyr to 100 kyr glacial cycles. Significant advances have been made over the past decades in understanding the drivers and responses of this transition, including changes in atmospheric CO₂, ocean circulation, and ice sheet dynamics, but a comprehensive perspective on their complex interactions remains lacking.
In this session, we aim to bring together researchers working on the MPT from diverse perspectives, integrating marine and terrestrial records, geochemical proxies, and climate modelling. We particularly welcome contributions that extend the boundaries of previous work (for example, with higher spatial or temporal resolution) to examine the role of atmospheric CO₂, ocean circulation, ice sheet dynamics, and/or external forcing mechanisms. Studies that extend beyond the well-studied North Atlantic to include insights from the Southern Ocean, Pacific, and other key regions to advance our understanding of MPT and its drivers are also encouraged.
Co-Sponsor(s):
Index Terms:
4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]
4924 Geochemical tracers [PALEOCEANOGRAPHY]
4938 Interhemispheric phasing [PALEOCEANOGRAPHY]
4962 Thermohaline [PALEOCEANOGRAPHY]
Student/Early Career Chair: Ms. Lathika N, M.Sc, National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Vasco da Gama, India
Primary Chair: Sophia Hines, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States
Co-chairs: Stephen Barker, Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom, Chandranath Basak, University of Delaware, Department of Earth Sciences, Newark, United States and Laurie Menviel, University of New South Wales, Climate Change Research Centre, Sydney, NSW, Australia
Pleistocene evolution of water mass circulation in the Agulhas Basin with emphasis on the mid-Pleistocene Transition (2019513)
Ms. Lathika N, M.Sc1, Waliur Rahaman2, Steven L Goldstein3, Sophia Hines4, Sidney R Hemming3, Ian R Hall5, Louise Bolge6, Priyesh Prabhat2 and Thamban Meloth7, (1)National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Vasco da Gama, India, (2)National Centre for Polar and Ocean Research, Goa, India, (3)Lamont-Doherty Earth Observatory, Palisades, United States, (4)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States, (5)Cardiff University, School of Earth and Environmental Sciences, Cardiff, CF24, United Kingdom, (6)Columbia University of New York, Palisades, United States, (7)National Center for Polar and Ocean Research, Polar Sciences, Vasco-da-Gama, India
Exploring changes in global ocean circulation during the MPT using snapshot simulations. (2023432)
Jeanne Millot-Weil, University of Bristol, School of Geographical Sciences, Bristol, United Kingdom, Paul J Valdes, University of Bristol, Bristol, United Kingdom and Alexander Farnsworth, University of Bristol, BRIDGE, School of Geographical Sciences, Bristol, United Kingdom
Tracing MPT atmospheric CO₂ Oscillations via Southern Ocean CO₂ system Reconstructions (2024196)
Chen Xu1,2, Jimin Yu3,4, Megan Pelly1, Claus-Dieter Hillenbrand5, Stephen Barker2, Caroline H Lear6, Andrea Burke1 and James William Buchanan Rae1, (1)University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, (2)Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom, (3)Australian National University, Research School of Earth Sciences, Canberra, ACT, Australia, (4)Laoshan Laboratory, Qingdao, China, (5)British Antarctic Survey, Cambridge, United Kingdom, (6)Cardiff University, School of Earth and Ocean Sciences, Cardiff, United Kingdom
Changes in Deep Circulation in the Eastern North Atlantic Ocean Across the Mid-Pleistocene Transition (2042072)
Jerry F McManus1, Celeste Pallone2, Apollonia Arellano3, Macy Mathews3, Montserrat Alonso-Garcia4, Elizabeth Roxana Lasluisa Molina Molina5, Yaiza Kinney6, Erin Kim7, Brooke Harrison3, Isabel Plower3, Rachel Brzezicki3 and Alexia Pryor6, (1)Lamont-Doherty Earth Observatory of Columbia University, Palisades, United States, (2)Lamont-Doherty Earth Observatory, Palisades, United States, (3)Lamont -Doherty Earth Observatory, Palisades, United States, (4)University of Salamanca, Geology, Salamanca, Spain, (5)University of Salamanca, Salamanca, Spain, (6)Columbia University of New York, Palisades, NY, United States, (7)University of Michigan, Ann Arbor, United States
