Start |Grid View | Author Index | View Uploaded Presentations | Meeting Information

Joint 69th Annual Southeastern / 55th Annual Northeastern Section Meeting - 2020

Paper No. 22-8
Presentation Time: 1:30 PM-5:30 PM

AN EXPANDED VIEW ON MID- TO LATE PLIOCENE WEST ANTARCTIC ICE SHEET DYNAMICS


ROSENBERG, Christiana Destry1, PATTERSON, Molly O.1, VALENZUELA, Natalia Varela2, ROMANS, Brian W.2, ASH, Jeanine3, KULHANEK, Denise K.4, KEISLING, Benjamin Andrew5, MCKAY, Robert M.6, GRANT, Georgia7, VAN PEER, Tim8, JONES V, Harold1, DE SANTIS, Laura9 and SCIENTISTS, IODP Expedition 37410, (1)Geological Sciences and Environmental Studies, Binghamton University, 4400 Vestal Parkway East, Binghamton, NY 13902, (2)Geosciences, Virginia Tech, 4044 Derring Hall, Blacksburg, VA 24061, (3)Earth, Environmental and Planetary Sciences, Rice University, Houston, TX 77005, (4)International Ocean Discovery Program, Texas A&M University, 1000 Discovery Dr, College Station, TX 77845, (5)Department of Geosciences, University of Massachusetts Amherst, Amherst, MA 01003, (6)Antarctic Research Center, Victoria University of Wellington, Kelburn Parade, Room 508, Cotton Building, Gate 7, Wellington, 6012, New Zealand, (7)GNS Science Research Institute, Lower Hutt, (8)National Oceanography Centre Southampton, University of Southampton, Southampton, (9)Geofisica Della Litosfera Instituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Sgonico, (10)IODP, Texas A&M University, 1000 Discovery Drive 7547, College Station, TX 77845

The mid-Pliocene provides an analogue towards understanding the sensitivity and feedbacks associated with the Earth’s climate system under scenarios expected to occur in the near future (e.g., 2100). One of the largest uncertainties concerning both the climate of the mid-Pliocene, and future projections surrounds the response of the Antarctic ice sheet to a global climate system that exceeds a 2°C warming compared to pre-industrial values. This is particularly true for the West Antarctic Ice Sheet (WAIS) and marine based sectors of the East Antarctic Ice Sheet (EAIS). Paleo-calibrated numerical ice sheet modelling studies suggest these regions may contribute up to 30-60 cm of global sea level rise (GSLR) by 2100: despite the sophisticated nature of these modeling studies, there is still a fundamental lack of understanding concerning the role of natural forcing factors on ice sheet dynamics such as the role of incoming solar radiation during periods of ice sheet advance and retreat. Established sedimentological techniques (e.g., grain size) have been used to develop a continuous and high-resolution record of mid- to Late Pliocene (3.3 to 2.5 Ma) ice sheet discharge events, in order to investigate the role of external periodic forcing, quasi-periodic millennial-scale forcing, and non-periodic processes on WAIS dynamics.

Session No. 22--Booth# 27

D14. Paleoclimatology/Oceanography (Posters)
Friday, 20 March 2020: 1:30 PM-5:30 PM
Grand Ballroom A–D (Hyatt Regency Reston)
Geological Society of America Abstracts with Programs. Vol. 52, No. 2
doi: 10.1130/abs/2020SE-344881
© Copyright 2020 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.
Back to: D14. Paleoclimatology/Oceanography (Posters)
<< Previous Abstract | Next Abstract >>