noaa-other-15814 Ørkendalen, Kangerlussuaq, Greenland Holocene Moraine 10Be Ages Levy, L.B.; Kelly, M.A.; Howley, J.A.; Virginia, R.A. Ørkendalen, Kangerlussuaq, Greenland Holocene Moraine 10Be Ages 2013-12-21 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/15814 Investigator L.B. Levy Investigator M.A. Kelly Investigator J.A. Howley Investigator R.A. Virginia earth science paleoclimate others geoscientificInformation 7390 cal yr BP 6290 cal yr BP Complete 67.145 67.145 -50.16 -50.16 250 250 Continent North America Greenland Ørkendalen Moraines>LATITUDE 67.145>LONGITUDE -50.16 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 Laura B. Levy, Meredith A. Kelly, Jennifer A. Howley, Ross A. Virginia 2012 Quaternary Science Reviews 52 1-5 10.1016/j.quascirev.2012.07.021 http://www.sciencedirect.com/science/article/pii/S0277379112002880

Although Greenland ice core records register relatively stable Holocene climate conditions, the lower elevation margins of the Greenland Ice Sheet (GrIS) experienced significant Holocene fluctuations. These fluctuations include ice sheet recession during the Holocene Thermal Maximum (9-5 ka) and advance during the Little Ice Age (LIA; ~A.D. 1350-1880). Determining the extent and timing of these fluctuations is important for understanding the response of the GrIS to interglacial climate conditions both warmer and colder than at present and for developing accurate ice sheet models. Sets of moraines marking past extents of the southwestern GrIS margin occur in the Kangerlussuaq region. We focus on the Ørkendalen moraines, a prominent moraine set located within 2 km of the modern ice margin and just outboard of the LIA moraines. We present the first 10Be ages of the Ørkendalen moraines indicating they were deposited at 6.8 ± 0.3 ka. The geomorphic relationship between the Ørkendalen and LIA moraines indicates that the ice sheet margin was inboard of its Ørkendalen extent between ~6.8 ka and the culmination of the LIA. The age of the Ørkendalen moraines provides an important constraint on the extent of the southwestern GrIS during the middle Holocene. STUDY NOTES: 10Be ages on boulders on moraines, Ørkendalen, Kangerlussuaq, Greenland

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/levy2012/orkendalen2012ages.txt Ørkendalen moraine ages; Text Data File USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11