Geological Society of America

37 High-Resolution Records of Holocene Climate Change (Posters)

Tuesday, 22 March 2016
8:00 AM - 12:00 PM
Convention Hall

RECENT PALEOCLIMATE RECORD FROM THE PALMER DEEP, WESTERN ANTARCTIC PENINSULA

Paper number: 37-2
Program: Theme Sessions
Time: 8:00 AM – 12:00 PM

Authors

Amy Leventer Presenting Author
Colgate University, Hamilton, NY
Eugene Domack
University of South Florida, St. Petersburg, FL
Meghan Duffy
Colgate University, Hamilton, NY
Robert Hynes
Colgate University, Hamilton, NY
Catherine Smith
University of South Florida, St. Petersburg, FL
Amelia Shevenell
University of South Florida, St. Petersburg, FL

Abstract

Marine sediment cores from the Palmer Deep, located on the western Antarctic Peninsula shelf, have permitted extremely high-resolution reconstruction of the transition from the last glacial period to the Holocene as well as the century- to millennial-scale climate variability that characterizes the Holocene. These data have been instrumental in identifying the processes that drove the last deglaciation and the role of climate forcings over the past 13,000 years. During cruise LMG13-11, a 4.4 meter jumbo kasten core was recovered from the Palmer Deep (64°51.731S, 64°12.545W, 1031 m water depth), with the goal of evaluating the most recent climate record, building upon records that were derived from cores collected almost two decades earlier. The record from this new core enables us to address the proxy record of recent rapid regional warming of the Peninsula, a location where atmospheric temperature has increased at a rate five times the global average, and significant changes have been observed in the oceanic ecosystem. Chronologic constraints are provided by Pb-210 activity profiles. Proxy diatom data, analyzed at 2 cm intervals in the upper 50 cm of the core, record approximately the past 250 years, and document oceanographic change over this time period.

Geological Society of America Abstracts with Programs. Vol. 48, No. 1

doi: 10.1130/abs/2016NE-272706

© Copyright 2016 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.