Widespread persistence of expanded East Antarctic glaciers in the southwest Ross Sea during the last deglaciation

Abstract

Research Article| May 01, 2017 Widespread persistence of expanded East Antarctic glaciers in the southwest Ross Sea during the last deglaciation Jae Il Lee; Jae Il Lee 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea Search for other works by this author on: GSW Google Scholar Robert M. McKay; Robert M. McKay * 2Antarctic Research Centre, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand *E-mail: [e-mail] Search for other works by this author on: GSW Google Scholar Nicholas R. Golledge; Nicholas R. Golledge 2Antarctic Research Centre, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand3GNS Science, Avalon, Lower Hutt 5011, New Zealand Search for other works by this author on: GSW Google Scholar Ho Il Yoon; Ho Il Yoon 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea Search for other works by this author on: GSW Google Scholar Kyu-Cheul Yoo; Kyu-Cheul Yoo 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea Search for other works by this author on: GSW Google Scholar Hyoung Jun Kim; Hyoung Jun Kim 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea Search for other works by this author on: GSW Google Scholar Jong Kuk Hong Jong Kuk Hong 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea Search for other works by this author on: GSW Google Scholar Author and Article Information Jae Il Lee 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea Robert M. McKay * 2Antarctic Research Centre, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand Nicholas R. Golledge 2Antarctic Research Centre, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand3GNS Science, Avalon, Lower Hutt 5011, New Zealand Ho Il Yoon 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea Kyu-Cheul Yoo 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea Hyoung Jun Kim 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea Jong Kuk Hong 1Korea Polar Research Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic of Korea *E-mail: [e-mail] Publisher: Geological Society of America Received: 19 Oct 2016 Revision Received: 31 Dec 2016 Accepted: 08 Jan 2017 First Online: 28 Jun 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2017) 45 (5): 403–406. https://doi.org/10.1130/G38715.1 Article history Received: 19 Oct 2016 Revision Received: 31 Dec 2016 Accepted: 08 Jan 2017 First Online: 28 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jae Il Lee, Robert M. McKay, Nicholas R. Golledge, Ho Il Yoon, Kyu-Cheul Yoo, Hyoung Jun Kim, Jong Kuk Hong; Widespread persistence of expanded East Antarctic glaciers in the southwest Ross Sea during the last deglaciation. Geology 2017;; 45 (5): 403–406. doi: https://doi.org/10.1130/G38715.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract It has been suggested that the grounding line of the Last Glacial Maximum (LGM) ice sheet in the Ross Sea, Antarctica, receded in an approximately north-to-south pattern during the Holocene. An implication of this hypothesis is that geological evidence from the southwestern Ross Sea has been used widely to interpret retreat histories of the West Antarctic Ice Sheet (WAIS) across the wider Ross Sea embayment. Accurately constraining the timing and pattern of marine-based ice sheet retreat in this embayment is critical to understanding the drivers that may have triggered this event, and its contribution to rapid sea-level rise events. Here, we present new multibeam swath bathymetry data that identifies well-preserved glacial features indicating that thick (>700 m) marine-based ice derived from the East Antarctic Ice Sheet coastal outlet glaciers dominated the ice sheet input into the southwestern Ross Sea during the last phases of glaciation. Subglacial geomorphic features indicate that ice derived from present outlet glacier valleys in South Victoria Land flowed southeastward. This is more consistent with flowlines from model-based interpretations of an earlier retreat of the WAIS in the central Ross Sea than with previous land-based geological reconstructions. This implies that coastal records of deglaciation along the Transantarctic Mountains front record only the final phases of glacial retreat in the Ross Sea. Therefore, chronological data from the central embayment are required to accurately constrain the timing of large-scale glacial retreat in the Ross Sea and to identify the mechanisms that drove it. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.