# SE-Dome ll Ice Core, South Eastern Greenland Accumulation Rate, Melt Crust and Feature, H2O2 and Tritium Concentration, Bulk Density and Electrical Conductivity Data from 1800 to 2020 CE #----------------------------------------------------------------------- # 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 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 '#' followed by a space # Data lines have no '#' # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/38404 # 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-icecore-38404.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Ice Cores # # Dataset_DOI: 10.25921/bx51-ng14 # # Science_Keywords: Glaciers and Ice Sheets Reconstruction #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/icecore/greenland/kawakami2023/kawakami2023-se-dome_tritium.txt # Data_Download_Description: NOAA Template File; Tritium Data # #--------------------------------------- # Contribution_Date # Date: 2023-08-11 #--------------------------------------- # File_Last_Modified_Date # Date: 2023-11-23 #--------------------------------------- # Title # Study_Name: SE-Dome ll Ice Core, South Eastern Greenland Accumulation Rate, Melt Crust and Feature, H2O2 and Tritium Concentration, Bulk Density and Electrical Conductivity Data from 1800 to 2020 CE #--------------------------------------- # Investigators # Investigators: Kawakami, Kaoru(0000-0001-9711-3762); Iizuka, Yoshinori (0000-0001-7241-6062); Sasage, Mahiro; Matsumoto, Mai; Saito, Takeshi; Hori, Akira (0000-0002-5887-905X); Sakiko, Ishino (0000-0002-5897-7063); Fujita, Shuji (0000-0003-0127-0777); Fujita, Koji (0000-0003-3753-4981); Takasugi,Keita; Hatakeyama, Takumi; Hamamoto, Saaya; Watari, Akihisa; Esashi, Nao; Otsuka, Miu; Uemura, Ryu (0000-0002-4236-0085); Horiuchi, Kazuho (0000-0003-3185-8766); Minowa, Masahiro (0000-0003-2667-9798); Hattori, Shohei(0000-0002-4438-5462); Aoki, Teruo (0000-0003-1007-986X); Hirabayashi,Motohiro; Kawamura, Kenji (0000-0003-1163-700X); Matoba, Sumito (0000-0003-2214-4649) #--------------------------------------- # Description_Notes_and_Keywords # Description: #--------------------------------------- # Publication # Authors: Kaoru Kawakami, Yoshinori Iizuka, Mahiro Sasage, Mai Matsumoto, Takeshi Saito, Akira Hori, Sakiko Ishino, Shuji Fujita, Koji Fujita, Keita Takasugi, Takumi Hatakeyama, Saaya Hamamoto, Akihisa Watari, Nao Esashi, Miu Otsuka, Ryu Uemura, Kazuho Horiuchi, Masahiro Minowa, Shohei Hattori, Teruo Aoki, Motohiro Hirabayashi, Kenji Kawamura, Sumito Matoba # Published_Date_or_Year: 2023-10-27 # Published_Title: SE-Dome II ice core dating with half-year precision: Increasing melting events from 1799 to 2020 in southeastern Greenland # Journal_Name: Journal of Geophysical Research: Atmospheres # Volume: 128 # Edition: # Issue: 20 # Pages: # Report_Number: e2023JD038874 # DOI: 10.1029/2023JD038874 # Online_Resource: # Full_Citation: # Abstract: Arctic warming has accelerated surface melting even in the highland areas of the Greenland ice sheet (GrIS). Understanding the relationship between climate and surface melting is essential for improving the estimates of ice-sheet mass loss due to warming. Here we analyze a 250 m-long ice core from the southeastern dome of GrIS (SE-Dome site; 67 19'17" N, 36 47'03" W, 3161 m a.s.l.), where the annual mean temperature is -20.9C and the accumulation rate is high and there is a large discrepancy among climate models regarding snow accumulation estimates. A time scale was established for 1799–2020 with a half-year uncertainty using annual counting of H2O2 concentration and five time horizons determined by electrical conductivity, melt events, and tritium concentration. The annual accumulation rate from the ice core shows no significant trend over 221 years and has an average of 1.04 +/- 0.20 m w.e. yr-1. In contrast, the frequency and thickness of refrozen melt layer have increased over 221 years, and are synchronized with temperature changes in the Arctic. The thickness of the melt layers correlates positively with the time-integrated summer temperature anomaly using a reanalysis of air temperature. The in-situ accumulation records in the southeastern GrIS provide an important basis for correcting reanalysis data such as ERA5, which in turn are valuable for improving regional climate models. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Japan Ministry of Education, Culture, Sports, Science and Technology (MEXT) # Grant: 18H05292, 23H00511, 20K19961, 20H04305, 23K18516 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Arctic Challenge for Sustainability (ArCS II) Project # Grant: JPMXD1420318865 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: National Institute of Polar Research (NIPR) # Grant: 3-8 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Nanjing Normal University # Grant: #--------------------------------------- # Site_Information # Site_Name: SE-Dome II # Location: Greenland # Northernmost_Latitude: 67.19 # Southernmost_Latitude: 67.19 # Easternmost_Longitude: -36.47 # Westernmost_Longitude: -36.47 # Elevation_m: 3160.7 #--------------------------------------- # Data_Collection # Collection_Name: SE-Dome_tritium # First_Year: # Last_Year: # Time_Unit: # Core_Length_m: 250.79 # Parameter_Keywords: # Notes: #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # 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. # # Data variables follow that are preceded by "##" in columns one and two. # 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_m depth,,,meter,,ice cores,,,N,middle depth of sample ## TU 3H,,,tritium unit,,ice cores,,,N, #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: Depth_m TU 77.137 10.79 77.745 18.00 78.324 15.12 78.880 11.21 79.400 12.72 79.931 10.97 80.523 16.98 81.127 18.01 81.648 22.19 82.164 43.59 82.677 30.15 83.182 65.52 83.664 107.94 84.244 66.04 84.723 133.95 85.198 164.41 85.669 38.81 86.165 48.61 86.719 13.31 87.240 5.69 87.803 2.98 88.323 6.23 88.871 3.30 89.446 3.83