Late-glacial grounding line retreat in the northern Ross Sea, Antarctica

Research Article| February 15, 2019 Late-glacial grounding line retreat in the northern Ross Sea, Antarctica Brent M. Goehring; Brent M. Goehring * 1Department of Earth and Environmental Sciences, Tulane University, New Orleans, Louisiana 70118, USA *E-mail: bgoehrin@tulane.edu Search for other works by this author on: GSW Google Scholar Greg Balco; Greg Balco 2Berkeley Geochronology Center, Berkeley, California 94709, USA Search for other works by this author on: GSW Google Scholar Claire Todd; Claire Todd 3Department of Geosciences, Pacific Lutheran University, Tacoma, Washington 98447, USA Search for other works by this author on: GSW Google Scholar Isaac Moening-Swanson; Isaac Moening-Swanson 3Department of Geosciences, Pacific Lutheran University, Tacoma, Washington 98447, USA Search for other works by this author on: GSW Google Scholar Keir Nichols Keir Nichols 1Department of Earth and Environmental Sciences, Tulane University, New Orleans, Louisiana 70118, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Brent M. Goehring * 1Department of Earth and Environmental Sciences, Tulane University, New Orleans, Louisiana 70118, USA Greg Balco 2Berkeley Geochronology Center, Berkeley, California 94709, USA Claire Todd 3Department of Geosciences, Pacific Lutheran University, Tacoma, Washington 98447, USA Isaac Moening-Swanson 3Department of Geosciences, Pacific Lutheran University, Tacoma, Washington 98447, USA Keir Nichols 1Department of Earth and Environmental Sciences, Tulane University, New Orleans, Louisiana 70118, USA *E-mail: bgoehrin@tulane.edu Publisher: Geological Society of America Received: 24 Jul 2018 Revision Received: 19 Dec 2018 Accepted: 12 Jan 2019 First Online: 15 Feb 2019 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2019 Geological Society of America Geology (2019) 47 (4): 291–294. https://doi.org/10.1130/G45413.1 Article history Received: 24 Jul 2018 Revision Received: 19 Dec 2018 Accepted: 12 Jan 2019 First Online: 15 Feb 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Brent M. Goehring, Greg Balco, Claire Todd, Isaac Moening-Swanson, Keir Nichols; Late-glacial grounding line retreat in the northern Ross Sea, Antarctica. Geology 2019;; 47 (4): 291–294. doi: https://doi.org/10.1130/G45413.1 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 We present geochronologic constraints on the timing of grounding line retreat in the western Ross Sea, Antarctica, based on changes in ice-surface elevation of glaciers in northern Victoria Land. We constructed ice-surface lowering histories using 14C surface exposure dating at Tucker and Aviator Glaciers, and the timing of retreat at Terra Nova Bay. Our record demonstrates that thinning of 290–380 m occurred since the Last Glacial Maximum at Tucker Glacier, and at least 250 m of thinning occurred at Aviator Glacier. We observed no significant thinning prior to or during meltwater pulse 1a. Maximum rates of thinning occurred between 13.6 and 12.4 ka at Tucker Glacier, and after 11.4 ka at Aviator Glacier. At both locations, ice surfaces were near their present elevations by ca. 7.5 ka. Ice-surface lowering in northern Victoria Land was a linear response to sea-level rise during deglaciation and provides a contrast to the nonlinear response of glaciers to the south in the presence of relatively stable sea level. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.