#----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:14734 # Online_Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/halfandhalf2013-2c-1n.txt # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleolimnology #-------------------- # Contribution_Date # Date: 2013-07-11 #-------------------- # Title # Study_Name: Liverpool Land east Greenland late Holocene expansion of Istorvet ice cap #-------------------- # Investigators # Investigators: Lowell,T,V.;Hall,B.L.;Kelly,M.A.;Bennike,O.;Lusas,A.R.;Honsaker,W.;Smith,C.A.;Levy,L.B.;Travis,S.;Denton,G.H. #-------------------- # Description_and_Notes Description: Data includes Loss-on-Ignition from two lakes (Half and Half and Snoopy) in Liverpool Land, East Greenland. Raw core information is at the Limnological Research Center(LRC)in Minneapolis, MN as are 1/2 of the archive cores. Working cores are at the University of Cincinnati. #-------------------- # Publication # Authors: Thomas V. Lowell, Brenda L. Hall, Meredith A. Kelly, Ole Bennike, Amanda R. Lusas, William Honsaker, Colby A. Smith, Laura B. Levy, Scott Travis,George H. Denton # Published_Date_or_Year: 2013 # Published_Title: Late Holocene expansion of Istorvet ice cap, Liverpool Land, east Greenland # Journal_Name: Quaternary Science Reviews # Volume: 63 # Edition: # Issue: # Pages: 128-140 # Report_Number: # DOI: # Publication_Place: # Publisher: # ISBN: # Online_Resource: # Other_Reference_Details: ISSN 0277-3791 # Full_Citation: # Abstract: The Greenland Ice Sheet is undergoing dynamic changes that will have global implications if they continue into the future. In this regard, an understanding of how the ice sheet responded to past climate changes affords a baseline for anticipating future behavior. Small, independent ice caps adjacent to the Greenland Ice Sheet (hereinafter called “local ice caps”) are sensitive indicators of the response of Greenland ice-marginal zones to climate change. Therefore, we reconstructed late Holocene ice-marginal fluctuations of the local Istorvet ice cap in east Greenland, using radiocarbon dates of subfossil plants, 10Be dates of surface boulders, and analyses of sediment cores from both threshold and control lakes. During the last termination, the Istorvet ice cap had retreated close to its maximum Holocene position by w11,730 cal yr BP. Radiocarbon dates of subfossil plants exposed by recent recession of the ice margin indicate that the Istorvet cap was smaller than at present from AD 200 to AD 1025. Sediments from a threshold lake show no glacial input until the ice cap advanced to within 365 m of its Holocene maximum position bywAD 1150. Thereafter the ice cap remained at or close to this position until at least AD 1660. The timing of this, the most extensive of the Holocene, expansion is similar to that recorded at some glaciers in the Alps and in southern Alaska. However, in contrast to these other regions, the expansion in east Greenland at AD 1150 appears to have been very close to, if not at, a maximum Holocene value. Comparison of the Istorvet ice-cap fluctuations with Holocene glacier extents in Southern Hemisphere middle-to-high latitude locations on the Antarctic Peninsula and in the Andes and the Southern Alps suggests an out-of-phase relationship. If correct, this pattern supports the hypothesis that a bipolar see-saw of oceanic and/or atmospheric circulation during the Holocene produced asynchronous glacier response at some localities in the two polar hemispheres. #------------------ # Funding_Agency # Funding_Agency_Name: National Science Foundation (USA) # Grant: ARC 0908081 #------------------ # Site_Information # Site_Name: Half and Half Lake # Location: # Region: # Country: Greenland # Northernmost_Latitude: 70.972 # Southernmost_Latitude: 70.972 # Easternmost_Longitude: -22.286 # Westernmost_Longitude: -22.286 # Elevation: 100 #------------------ # Data_Collection # Collection_Name: HH-2C-1N # Earliest_Year: # Most_Recent_Year: # Time_Unit: # Core_Length: # Notes: #------------------ # Species: #------------------ # Chronology: #---------------- # Variables # Short_name What,Material,Error,Units, Seasonality,Archive,Details,Method,Data_type ## depth_cm Depth,,,cm,,,,,N ## LOI_percent Loss On Ignition,sediment,,percent,,paleolimnology,,,,N #---------------- # Data # Missing_Values: # # Data line format - tab-delimited text, variable short name as header depth_cm LOI_percent 8.5 7.1672 10.5 9.1912 12.5 15.3846 14.5 1.0076 16.5 1.1033 18.5 1.0081 20.5 1.2203 22.5 9.3651 24.5 9.0909 26.5 9.1837 28.5 10.3933 30.5 15.6863 32.5 12.7976 34.5 18.0505 36.5 11.4943 38.5 15.0838 40.5 12.8852 42.5 17.4014 44.5 21.2195 46.5 6.3709 48.5 16.2791 50.5 1.3193 52.5 1.5131 54.5 7.1934 56.5 4.3023 58.5 3.8542 60.5 2.4816 62.5 0.8805 64.5 1.9139 66.5 2.1536 68.5 1.4754 70.5 1.4058 72.5 1.9512 74.5 2.2611 76.5 1.8533 78.5 1.6097 80.5 1.8576 82.5 1.6043 84.5 1.7483 86.5 1.7051 88.5 1.5831 90.5 1.7606 92.5 1.7162 94.5 1.6931 96.5 1.5216 98.5 1.5702 100.5 1.5248