# West Greenland Holocene Lake Sediment Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # 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 these downloaded data. If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/13664 # 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-13664.json # Study_Level_JSON_Description: JSON metadata of this file's parent study, which includes all study metadata. # # Data_Type: Paleolimnology # # Dataset_DOI: 10.25921/86my-zm12 # # Science_Keywords: #-------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/greenland/pluto2013.txt # Data_Download_Description: NOAA Template File; Loss-on-Ignition and Magnetic Susceptibility Data # # Original_Source_URL: # Original_Source_Description: # #-------------------- # Contribution_Date # Date: 2012-12-13 #-------------------- # File_Last_Modified_Date # Date: 2022-10-07 #-------------------- # Title # Study_Name: West Greenland Holocene Lake Sediment Data #-------------------- # Investigators # Investigators: Axford, Y.(https://orcid.org/0000-0002-8033-358X); Losee, S.; Briner, J.P.; Francis, D.R.; Langdon, P.G.(https://orcid.org/0000-0003-2724-2643); Walker, I.R. #-------------------- # Description_Notes_and_Keywords # Description: Lake sediment proxy data from 5 Holocene lakes in West Greenland, located between Disko Bugt and the Greenland Ice Sheet near the coastal town of Ilulissat. Proxy data include Magnetic Susceptibility (MS), Loss-on-Ignition (LOI), Biogenic Silica, and chironomid assemblages. #-------------------- # Publication # Authors: Yarrow Axford, Shanna Losee, Jason P. Briner, Donna R. Francis, Peter G. Langdon, and Ian R. Walker # Journal_Name: Quaternary Science Reviews # Published_Title: Holocene temperature history at the western Greenland Ice Sheet margin reconstructed from lake sediments # Published_Date_or_Year: 2013 # Volume: 59 # Pages: 87-100 # Issue: # Report_Number: # DOI: 10.1016/j.quascirev.2012.10.024 # Full_Citation: # Abstract: Predicting the response of the Greenland Ice Sheet to future climate change presents a major challenge to climate science. Paleoclimate data from Greenland can provide empirical constraints on past cryospheric responses to climate change, complementing insights from contemporary observations and from modeling. Here we examine sedimentary records from five lakes near Jakobshavn Isbrae in central West Greenland to investigate the timing and magnitude of major Holocene climate changes, for comparison with glacial geologic reconstructions from the region. A primary objective of this study is to constrain the timing and magnitude of maximum warmth during the early to middle Holocene positive anomaly in summer insolation. Temperature reconstructions from subfossil insect (chironomid) assemblages suggest that summer temperatures were warmer than present by at least 7.1 ka (the beginning of the North Lake record; ka = thousands of years before present), and that the warmest millennia of the Holocene occurred in the study area between 6 and 4 ka. Previous studies in the Jakobshavn region have found that the local Greenland Ice Sheet margin was most retracted behind its present position between 6 and 5 ka, and here we use chironomids to estimate that local summer temperatures were 2-3°C warmer than present during that time of minimum ice sheet extent. As summer insolation declined through the late Holocene, summer temperatures cooled and the local ice sheet margin expanded. Gradual, insolation-driven millennial-scale temperature trends in the study area were punctuated by several abrupt climate changes, including a major transient event recorded in all five lakes between 4.3 and 3.2 ka, which overlaps in timing with abrupt climate changes previously documented around the North Atlantic region and farther afield at ~4.2 ka. #-------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant_Number: ARC-0909347, ARC-0909334, BCS-0752848 #-------------------- # Funding_Agency # Funding_Agency_Name: Northwestern University # Grant_Number: Initiative for Sustainability and Energy (ISEN) #-------------------- # Site_Information # Site_Name: Pluto Lake # Location: Greenland # Northernmost_Latitude: 69.1087 # Southernmost_Latitude: 69.1087 # Easternmost_Longitude: -51.0305 # Westernmost_Longitude: -51.0305 # Elevation: 170 #-------------------- # Data_Collection # Collection_Name: Pluto2013LOIMS # First_Year: 9271 # Last_Year: 2005 # Time_Unit: cal yr BP # Core_Length: .084 # Parameter_Keywords: physical properties # Notes: #-------------------- # Chronology_Information # Chronology: # Chronology # # Table 2 # Radiocarbon ages from lake sediment cores # # Core Depth Lab Number Material Dated Fraction Modern d13C Radiocarbon Age Calibrated Age # (cm) (‰PDB) (14C yr BP) (cal yr BP ± 2S) # # Loon Lake # 08LOO-1 20 CURL-10094 plant macrofossils 0.6180±0.0009 -37.7 3865±15 4320±90 # 08LOO-1 32 CURL-10104 plant macrofossils 0.5604±0.0010 -32.1 4655±15 5390±70 # 08LOO-1 46 CURL-10088 plant macrofossils 0.5265±0.0009 -34.5 5155±15 5920±70 # 08LOO-1 61 CURL-10101 plant macrofossils 0.5206±0.0008 -29.5 5525±15 6340±50 # # North Lake # 08NOR-3 23 CURL-10089 plant macrofossils 0.7265±0.0010 -28.1 2565±15 2680±60 # 08NOR-3 40 CURL-12613 plant macrofossils 0.6746±0.0013 -24.0 3160±20 3400±40 # 08NOR-3 61 CURL-12600 plant macrofossils 0.5928±0.0009 -24.9 4200±15 4740±90 # 08NOR-3 74 CURL-10091 plant macrofossils 0.5562±0.0010 -28.6 4715±20 5450±130 # 08NOR-3 100 CURL-12603 plant macrofossils 0.4631±0.0008 -28.8 6185±15 7090±80 # 08NOR-3 103 CURL-10092 plant macrofossils 0.4006±0.0008 -12.7 7350±20 8160±120 # # Fishtote Lake # 09FTL-SC2 2 CURL-12593 plant macrofossils 0.7864±0.0012 -21.8 1930±15 1860±40 # 09FTL-SC2 36 CURL-12606 plant macrofossils 0.6438±0.0009 -28.0 3540±15 3810±80 # 09FTL-SC2 65 CURL-12601 plant macrofossils 0.4995±0.0008 -24.0 5575±15 6360±50 # 09FTL-SC2 96 CURL-12608 plant macrofossils 0.367±0.0009 -27.6 8050±20 8910±120 # # Iceboom Lake # 08ICE-5 23 CURL-10083 plant macrofossils 0.9591±0.0015 -23.5 335±15 390±80 # 08ICE-5 36 CURL-10439 plant macrofossils 0.7952±0.0019 -27.8 1840±20 1770±60 # 08ICE-5 57 CURL-10434 plant macrofossils 0.6098±0.0015 -30.7 3980±20 4470±50 # 08ICE-5 70 CURL-10441 plant macrofossils 0.4534±0.0013 -30.5 6360±25 7300±120 # # Pluto Lake # 09PLO-1 4 CURL-12609 plant macrofossils 0.7539±0.0010 -29.7 2270±15 2260±80 # 09PLO-1 25 CURL-12599 plant macrofossils 0.6232±0.0012 -28.7 3800±20 4170±70 # 09PLO-1 50 CURL-12604 plant macrofossils 0.4050±0.0011 -14.9 7260±25 8090±70 # 09PLO-1 76 CURL-12594 plant macrofossils 0.3584±0.0009 -13.3 8245±20 9210±80 # #------------------ # Variables # # PaST_Thesaurus_Download_Resource: https://www.ncdc.noaa.gov/paleo/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # variables format: shortname what,material,error,units,seasonality,data_type,detail,method, C(har) or N(umeric) data,additional information # ## age_calBP age,,,calendar year before present,,paleolimnology,,,N, ## loi550C organic matter,sediment,,weight percent,,paleolimnology,,loss on ignition,N,loss on ignition 550 degrees C for 2 hours ## susc_si volume magnetic susceptibility,sediment,,dimensionless (CGS system),,paleolimnology,,magnetic susceptibility measurement with point or surface sensor,N, #-------------------- # Data: # Missing_Values: NA age_calBP loi550C susc_si 2005 28.9474 -0.4 2040 26.4199 -0.4 2075 23.3581 -0.2 2109 22.3729 -1.1 2144 0 2179 27.6653 -0.9 2214 29.4625 -0.9 2249 -0.8 2283 30.3835 -0.7 2318 28.9941 -0.7 2353 30.6299 -0.6 2388 29.8317 -0.6 2423 29.6936 -0.4 2458 27.4194 -1.4 2493 27.7207 -0.3 2529 29.2598 -1.4 2565 26.7627 -0.5 2601 27.1131 -1.5 2637 27.3676 -0.6 2674 27.9498 -0.7 2711 28.4908 -1.8 2749 26.6327 -1 2787 25.0648 -0.3 2826 24.3969 -0.3 2865 27.3307 -0.4 2905 28.3043 -0.4 2945 28.8039 -0.6 2987 27.3154 -0.7 3028 27.8873 -0.6 3071 24.4311 -0.6 3114 22.4775 -0.6 3158 21.3696 -0.8 3203 16.2173 -0.7 3249 -0.7 3296 -0.7 3344 18.9212 -0.8 3393 20.713 -0.8 3443 21.0412 -0.8 3494 21.3294 -0.9 3546 17.4431 -0.9 3599 16.6822 -1 3653 18.5654 -1 3709 21.1905 -1 3766 22.7992 -1 3824 23.9619 -1 3884 23.1502 -1 3945 23.0246 -1 4007 23.9525 -1 4071 25.1543 -1 4136 25.6964 -1 4203 27.69 0 4271 29.1339 -1 4341 25.6705 -1 4412 24.2049 -1 4485 23.3827 -1 4559 24.7059 -1 4634 25.4566 -1 4710 25.0332 -1 4788 23.3073 0 4866 22.3377 -1 4945 20.8924 -1 5025 22.2086 -1 5106 25 0 5188 24.6167 0 5270 21.5463 -1 5353 22.9107 0 5436 21.524 -1 5520 20.019 0 5604 21.1349 -1 5689 19.7036 -1 5773 16.7006 0 5858 18.1066 0 5943 14.8649 -1 6028 15.6587 0 6112 18.8385 0 6197 17.5123 0 6281 15.7513 0 6365 14.7914 1 6449 15.4309 1 6533 15.8395 0 6615 15.6134 1 6698 12.7989 1.3 6779 12.6777 1.1 6860 18.3673 0.9 6940 14.9752 0.8 7020 21.5135 0.7 7098 21.4654 0.6 7175 22.6179 -0.5 7252 20.674 0.1 7327 19.0647 -1.1 7401 17.6729 -1.3 7474 22.2336 -0.4 7545 22.6999 -0.6 7615 26.0643 -1.7 7683 24.7059 -1.8 7750 25.9013 -0.8 7815 29.0889 -1.7 7879 26.2557 -1.6 7941 23.8696 -1.6 8000 23.9316 -0.5 8058 25.7095 -1.4 8114 25 -1.4 8168 22.2132 -1.2 8221 20.6089 -1.2 8271 19.6356 -0.1 8319 20.3077 -1 8366 19.8552 -1 8411 17.2672 -1 8454 14.9956 -1 8495 19.2807 -1 8535 19.5052 -1 8573 22.0426 0 8610 23.8908 0.2 8645 23.176 0.5 8679 23.3251 -0.3 8711 24.2661 0.9 8741 26.2487 -0.4 8771 23.3937 0.5 8799 26.044 -0.7 8825 25.626 -0.8 8851 23.6404 -0.9 8875 22.8916 -1.3 8898 26.6981 -0.3 8920 26.1236 -1.4 8941 39.8585 -0.5 8961 30.3624 -0.6 8979 35.9906 -1.6 8997 34.0237 -1.7 9014 40.585 -1.8 9030 31.8855 -1 9044 36.1868 -1.9 9059 33.2041 -1 9072 29.6089 -1 9084 30.0412 -1 9096 34.9722 -1 9107 28.6011 -1 9118 27.088 -1 9128 26.096 -1 9137 22.7211 0 9146 19.9309 -1 9154 21.7663 -1 9162 31.7554 -1.8 9169 33.2831 -1 9176 24.8062 -1.7 9183 32.5534 -1.6 9189 27.4385 -1.6 9195 23.1552 -0.6 9201 20.0424 -0.5 9207 25.0167 -1.5 9213 24.5482 -1.4 9218 24.5592 -1.3 9223 21.2519 -1.3 9229 16.9383 0 9234 11.921 -0.2 9239 -0.1 9245 10.9881 0.9 9250 8.49273 0.7 9255 6.97514 0.6 9261 4.22686 1.6 9266 2.0316 1.5 9271 0.568182 7.1