noaa-other-9637 Sam Ford Fjord early Holocene Laurentide Glacier retreat data Briner, J.P.; Bini, A.C.; Anderson, R.S. Sam Ford Fjord early Holocene Laurentide Glacier retreat data 2010-09-16 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/9637 Investigator J.P. Briner Investigator A.C. Bini Investigator R.S. Anderson earth science paleoclimate others geoscientificInformation Arctic Glacial 10800 cal yr BP 9800 cal yr BP Complete 70.08 70.97 -71.45 -70.29 40 40 Continent North America Canada Nunavut Sam Ford Fjord>LATITUDE 70.52>LONGITUDE -70.83 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Briner, J.P., Bini, A.C., Anderson, R.S., 2009. Rapid early Holocene retreat of a Laurentide outlet glacier through an Arctic fjord. Nature Geoscience 2 (7), 496-499, doi:10.1038/ngeo556

Ice-sheet behaviour is disproportionately controlled by the dynamics of outlet glaciers that terminate in the ocean. However, outlet-glacier dynamics - particularly over timescales longer than the observational record—are not well understood, leading to uncertainties in our models of ice-sheet response to climate change. Here we use 10Be exposure ages and radiocarbon dating from the Sam Ford Fjord in the Canadian Arctic to reconstruct the retreat chronology of an outlet glacier of the Laurentide ice sheet, following the last glacial termination. We find that Sam Ford Fjord, which has a similar morphology to the troughs holding many outlet glaciers of the Greenland ice sheet, was rapidly deglaciated about 9,500 years ago, with retreat rates ranging from 5 to 58 m yr-1. The highest rates occurred in the deepest part of the fjord (900 m), whereas regions beyond the fjord mouth and up-valley of the head of the fjord experienced the lowest rates of retreat. We conclude that in such a fjord setting, there is a strong bathymetric control on the retreat of marine outlet glaciers: once the terminus of the outlet glacier retreated into deeper waters, increasing calving rates and basal sliding speeds caused the glacier to rapidly thin and retreat, stabilizing only when it reached the shallow inland head of the fjord.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/briner2009/briner2009.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/briner2009/briner2009.xls USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11