# Lower Sermilik Lake, Southeast Greenland 7700 Year Geochemical Data #---------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #---------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/14511 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-lake-14511.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Paleolimnology # # Dataset_DOI: 10.25921/csvp-4f95 # # Science_Keywords: Little Ice Age (LIA) #-------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/greenland/sermilik2013cn-noaa.txt # Data_Download_Description: NOAA Template File; Carbon and Nitrogen Data # #-------------------- # Contribution_Date # Date: 2013-05-21 #-------------------- # File_Last_Modified_Date # Date: 2024-06-06 #-------------------- # Title # Study_Name: Lower Sermilik Lake, Southeast Greenland 7700 Year Geochemical Data #-------------------- # Investigators # Investigators: Davin, S.H.; Bradley, R.S.(https://orcid.org/0000-0002-4032-9519); Balascio, N.L.(https://orcid.org/0000-0001-7106-3541) #-------------------- # Description_Notes_and_Keywords # Description: A 7,700 year record of Holocene climatic and environmental variability in Sermilik Valley, located on Ammassalik Island, SE Greenland. This objective of this study is to determine the timing of major Holocene climate transitions as expressed in the physical, elemental, and geochemical parameters preserved in the 484 cm sediment record of Lower Sermilik Lake. Major transitions observed in this study include the deglaciation of Sermilik Valley, the onset and termination of the Holocene Climatic Optimum, the transition into neoglacial conditions, and the Little Ice Age. #-------------------- # Publication # Authors: Davin, S.H. # Journal_Name: Thesis # Published_Title: 7700 Years of Holocene Climatic Variability in Sermilik Valley, Southeast Greenland Inferred from Lake Sediments # Published_Date_or_Year: 2013 # Volume: # Pages: # Issue: # Report_Number: # DOI: # Online_Resource: https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=2198&context=theses # Full_Citation: Davin, S.H. 2013. 7700 Years of Holocene Climatic Variability in Sermilik Valley, Southeast Greenland Inferred from Lake Sediments. Thesis, University of Massachusetts Amherst, 70 pp. # Abstract: During the latter half of the 20th century until present day there has been an unprecedented rise in global annual mean temperatures accompanied by rising sea levels and a decrease in Northern Hemisphere snow cover, which if it continues will lead to widespread disruption of climate patterns, ecosystems, and present-day landscapes. It is therefore of critical importance to establish an expanded network of paleoclimate records across the globe in order to better assesses how the global climate system has changed in the past, that we may create a metric by which to address modern change. Herein is presented a 7,700 years record of Holocene climatic and environmental variability in Sermilik Valley, located on Ammassalik Island, SE Greenland. This objective of this study is to determine the timing of major Holocene climate transitions as expressed in the physical, elemental, and geochemical parameters preserved in the 484 cm sediment record of Lower Sermilik Lake. Major transitions observed in this study include the deglaciation of Sermilik Valley, the onset and termination of the Holocene Climatic Optimum, the transition into neoglacial conditions, and the Little Ice Age. #-------------------- # Funding_Agency # Funding_Agency_Name: # Grant: #-------------------- # Site_Information # Site_Name: Lower Sermilik Lake # Location: Greenland # Northernmost_Latitude: 65.4 # Southernmost_Latitude: 65.4 # Easternmost_Longitude: -37.5 # Westernmost_Longitude: -37.5 # Elevation_m: 30 #-------------------- # Data_Collection # Collection_Name: Sermilik2013CN # First_Year: 7700 # Last_Year: 0 # Time_Unit: cal yr BP # Core_Length_m: 4.84 # Parameter_Keywords: carbon isotopes # Notes: #-------------------- # Chronology_Information # Chronology: Radiocarbon # Chronology_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/templates/noaa-wds-paleo-14c-terms.csv # Chronology_Download_Description: Radiocarbon terms and definitions. # Chronology_Notes: Eight radiocarbon dates from macrofossils. Dating was done at the Keck Carbon Cycle AMS Facility at the University of California Irvine. # Rejection_Rationale: # Reservoir_Method: # Calibration_Method: using Calib v.6.1 (Stuiver & Reimer,1993) and the IntCal09 data set (Reimer et al., 2009) # Age_Model_Method: a smooth spline with a smoothing factor of 0.3 as the weighted average of 10,000 iterations to the age-depth data using the Clam code (Blaauw 2010) for the statistical software R (R Development Core Team, 2010). # Missing_Values: NaN # Chronology_Table: # depth_cm age_14C_BP1950 age_14C_1s_yr calib_curve # 41.5 1130 20 IntCal09 # 67.5 1780 15 IntCal09 # 91.5 2145 15 IntCal09 # 94 2540 30 IntCal09 # 132 3010 15 IntCal09 # 168 3950 70 IntCal09 # 184 4690 35 IntCal09 # 229 5300 20 IntCal09 #-------------------- # Variables # PaST_Thesaurus_Download_Resource: https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data) # ## depth_cm depth,,,centimeter,,paleolimnology,,,N, ## N% nitrogen,sediment,,percent,,paleolimnology,,,N, ## toc% organic carbon,sediment,,percent,,paleolimnology,,,N, ## c/n carbon/nitrogen,sediment,,dimensionless,,paleolimnology,,,N,total organic carbon/total nitrogen ## d15N delta 15N,sediment,,per mil,,paleolimnology,,,N, ## d13CborgVPDB delta 13C,organic matter,,per mil VPDB,,paleolimnology,,,N, #-------------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: depth_cm N% toc% c/n d15N d13CborgVPDB 1 0.203 1.819 8.9606 1.18 -26.02 5 0.107 1.313 12.271 -0.67 -26.97 10 0.107 1.444 13.4953 1.86 -26.95 17.5 0.072 1.109 15.4028 -0.7 -25.97 21.5 0.089 1.088 12.2247 1.07 -27.47 25 0.089 1.069 12.0112 1.76 -26.89 32.5 0.118 1.294 10.9661 0.96 -27.29 37.5 0.084 1.167 13.8929 0.93 -26.86 40.5 0.088 1.044 11.8636 0.9 -26.77 44 0.109 1.308 12 1.1 -27.06 49 0.118 1.41 11.9492 1.83 -27.36 54.5 0.125 1.471 11.768 1.3 -27.45 59 0.136 1.356 9.9706 1.54 -27.5 64 0.068 0.797 11.7206 1.17 -27.14 67.5 0.15 1.545 10.3 1.83 -27.88 71.5 0.183 1.72 9.3989 1.83 -28.44 76.5 0.13 2.415 18.5769 -1.86 -26.14 82 0.508 3.697 7.2776 0.11 -29.93 87 0.25 2.467 9.868 1.41 -27.63 90 0.106 0.997 9.4057 1.35 -27.65 93 0.234 2.148 9.1795 1.71 -27.62 98 0.067 0.881 13.1493 1.4 -26.07 103 0.261 2.786 10.6743 1.35 -28.3 108 0.045 0.436 9.6889 0.98 -27.69 115 0.073 0.996 13.6438 0.46 -26.93 120 0.063 0.691 10.9683 0.65 -27.58 122.5 0.369 3.949 10.7019 0.69 -28.41 127.5 0.209 2.313 11.067 1.04 -27.5 132.5 0.367 3.784 10.3106 1.4 -28.09 138 0.119 1.215 10.2101 1.9 -27.36 144 0.167 1.699 10.1737 2.18 -28.28 149 0.19 1.824 9.6 1.19 -27.77 154 0.193 2.128 11.0259 1.41 -28.03 159 0.239 2.189 9.159 1.78 -28.4 164 0.237 2.283 9.6329 1.2 -29.24 168 0.219 2.089 9.5388 1.11 -28.54 173 0.274 2.9 10.5839 1.34 -30.09 178 0.221 2.182 9.8733 1.98 -29.7 187.5 0.139 1.539 11.0719 1.38 -24.66 198 0.166 1.703 10.259 0.65 -27.98 203 0.215 2.159 10.0419 1.52 -29.23 208 0.151 1.754 11.6159 1.47 -28.44 212 0.155 1.662 10.7226 2.48 -26.89 217 0.166 1.794 10.8072 2 -28.03 222 0.067 0.8 11.9403 2.43 -26.6 227 0.155 1.573 10.1484 1.91 -27.88 233 0.165 1.729 10.4788 2.06 -27.87 238 0.152 1.568 10.3158 1.73 -28.1 243 0.082 1.009 12.3049 1.37 -26.48 254 0.159 1.583 9.956 1.63 -27.67 259 0.188 1.836 9.766 2.3 -28.1 269 0.238 2.443 10.2647 1.45 -29.06 274 0.199 2.026 10.1809 1.53 -28.46 289 0.008 0.049 6.125 294 0.006 0.027 4.5 299 0.005 0.03 6 2.62 -26.66 304 0.009 0.023 2.5556 2.37 -30.36 314 0.007 0.018 2.5714 1.88 -26.72