Persistent millennial-scale glacier fluctuations in Ireland between 24 ka and 10 ka

Abstract

Research Article| December 12, 2017 Persistent millennial-scale glacier fluctuations in Ireland between 24 ka and 10 ka Aaron M. Barth; Aaron M. Barth * 1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA2Department of Geoscience, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA *E-mail: [e-mail] Search for other works by this author on: GSW Google Scholar Peter U. Clark; Peter U. Clark 1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA Search for other works by this author on: GSW Google Scholar Jorie Clark; Jorie Clark 1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA Search for other works by this author on: GSW Google Scholar Gerard H. Roe; Gerard H. Roe 3Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar Shaun A. Marcott; Shaun A. Marcott 2Department of Geoscience, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar A. Marshall McCabe; A. Marshall McCabe 4School of Geography and Environmental Sciences, University of Ulster, Coleraine, Northern Ireland BT52 1SA, UK Search for other works by this author on: GSW Google Scholar Marc W. Caffee; Marc W. Caffee 5Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA6Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, Indiana 47907, USA Search for other works by this author on: GSW Google Scholar Feng He; Feng He 1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA7Center for Climatic Research, Nelson Institute for Environmental Studies, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Joshua K. Cuzzone; Joshua K. Cuzzone 8Department of Earth System Science, University of California–Irvine, Irvine, California 92697-3100, USA Search for other works by this author on: GSW Google Scholar Paul Dunlop Paul Dunlop 4School of Geography and Environmental Sciences, University of Ulster, Coleraine, Northern Ireland BT52 1SA, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Aaron M. Barth * 1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA2Department of Geoscience, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA Peter U. Clark 1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA Jorie Clark 1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA Gerard H. Roe 3Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA Shaun A. Marcott 2Department of Geoscience, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA A. Marshall McCabe 4School of Geography and Environmental Sciences, University of Ulster, Coleraine, Northern Ireland BT52 1SA, UK Marc W. Caffee 5Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA6Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, Indiana 47907, USA Feng He 1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331, USA7Center for Climatic Research, Nelson Institute for Environmental Studies, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA Joshua K. Cuzzone 8Department of Earth System Science, University of California–Irvine, Irvine, California 92697-3100, USA Paul Dunlop 4School of Geography and Environmental Sciences, University of Ulster, Coleraine, Northern Ireland BT52 1SA, UK *E-mail: [e-mail] Publisher: Geological Society of America Received: 08 Aug 2017 Revision Received: 17 Nov 2017 Accepted: 21 Nov 2017 First Online: 12 Dec 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2018) 46 (2): 151–154. https://doi.org/10.1130/G39796.1 Article history Received: 08 Aug 2017 Revision Received: 17 Nov 2017 Accepted: 21 Nov 2017 First Online: 12 Dec 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Aaron M. Barth, Peter U. Clark, Jorie Clark, Gerard H. Roe, Shaun A. Marcott, A. Marshall McCabe, Marc W. Caffee, Feng He, Joshua K. Cuzzone, Paul Dunlop; Persistent millennial-scale glacier fluctuations in Ireland between 24 ka and 10 ka. Geology 2017;; 46 (2): 151–154. doi: https://doi.org/10.1130/G39796.1 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 report 80 10Be ages on 14 moraines from Irish cirques that show a previously unrecognized signal of at least eight millennial-scale fluctuations between 24.5 ± 0.7 ka and 11.0 ± 0.3 ka. Several moraine ages may be correlative with abrupt warming at the onset of the Bølling-Allerød interval (14.7 ka) and the end of the Younger Dryas interval (11.7 ka), suggesting a forced response. Our ages also identify glacier fluctuations that occurred when regional temperatures were relatively stable. This finding is consistent with modeling results showing several hundred-meter-scale glacier fluctuations in response to interannual variability. At the same time, our composite record of cirque-glacier average equilibrium line altitudes (ELAs) shows a response to warming due to increasing greenhouse gases and summer insolation modulated by abrupt climate changes. Our new 10Be chronology thus records both forced and unforced millennial-scale glacier fluctuations superimposed on a lower-frequency ELA signal of forced response to climate change. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.