Tsushima Akane atsushima@chiba-u.jp Nagasaki University https://www.nagasaki-u.ac.jp/en/ https://ror.org/058h74p94 Esashi Nao n.secondwind@gmail.com Nagoya University Matoba Sumito matoba@lowtem.hokudai.ac.jp 0000-0003-2214-4649 Hokkaido University https://ror.org/02e16g702 Iizuka Yoshinori iizuka@lowtem.hokudai.ac.jp 0000-0001-7241-6062 Hokkaido University https://ror.org/02e16g702 Adachi Kouji adachik@mri-jma.go.jp 0000-0002-2977-1728 Meteorological Research Institute, Tsukuba, Japan Kinase Takeshi tkinase@mri-jma.go.jp Meteorological Research Institute, Tsukuba, Japan Hirabayashi Motohiro hiraba@nipr.ac.jp National Institute of Polar Research, Tokyo NIPR https://ror.org/05k6m5t95 Kawakami Kaoru kaoru@lowtem.hokudai.ac.jp Hokkaido University https://ror.org/02e16g702 Uemura Ryu ryu.uemura@nagoya-u.jp 0000-0002-4236-0085 Nagoya University Kayastha Rijan B rijan@ku.edu.np 0000-0002-5896-1731 Kathmandu University, Dhulikhel, Nepal Fujita Koji cozy@nagoya-u.jp 0000-0003-3753-4981 Nagoya University 2025 Major ions in Trambau ice core , Nepal Himalaya dataset https://doi.org/10.1594/PANGAEA.974032 2025-02-10T08:52:49 An 81.2-m-long ice core was drilled in November 2019 at 5862m a.s.l. of Trambau Glacier, Rolwaling region, Nepal Himalaya.For the analysis, ice-core samples were prepared to measure major ion and tritium concentrations in the cold laboratory (-20 degC) at the Institute of Low-Temperature Science, Hokkaido University, Japan. We used a bandsaw to cut the core into 0.05 m sections. To minimize the risk of contamination (e.g., from drilling and transportation), we used a ceramic knife in a positive-pressure environment to shave off the outer surface of each sample. Decontaminated samples (n = 1592) were then packed in clean, sealed polyethylene bags and melted at ambient temperature, after which the resulting water was transferred to polypropylene bottles for storage. Concentrations of major water-soluble ions were quantified using Dionex ICS-1100 and ICS-2100 ion chromatography systems (Thermo Scientific). The measurement precision for each ionic species was 10%; we corrected measurement bias by multiple measurements of the same sample. Tritium concentrations were analyzed by liquid scintillation counting (LSC-LB3; Aloka, Japan) at the National Institute of Polar Research. First, we measured all layers at a coarse resolution (2.5 m intervals, n = 32 samples) by mixing each 1 mL from every 50 samples. To confirm the data at depths at which high tritium concentrations were measured, we made a second measurement for ice layers at depths between 29.77 and 35.11 m (0.25 m intervals, n = 20 samples) by mixing each 10 mL from every 5 samples. This data set contains the concentrations of major ions (Na, Cl, NH4, K, Mg, Ca, NO3, SO4) and tritium concentrations of the ice core. 86.545 86.545 27.919 27.919 86.545 27.919 2019-11-03T00:00:00 2019-11-08T00:00:00 0.04 81.17 Trambau_Ice_Core 27.919 86.545 5862.0 2019-11-03T00:00:00 2019-11-08T00:00:00 Ice drill ICEDRILL 17586 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ DEPTH, ice/snow Depth ice/snow m depth http://purl.obolibrary.org/obo/PATO_0001595 ice http://purl.obolibrary.org/obo/ENVO_01000277 snow Length L http://dbpedia.org/resource/Length Tsushima Akane atsushima@chiba-u.jp Depth ice/snow [m] Depth water equivalent Depth w.e. m Length L http://dbpedia.org/resource/Length Tsushima Akane atsushima@chiba-u.jp Depth w.e. [m] Age Age a AD/CE age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Tsushima Akane atsushima@chiba-u.jp Age [a AD/CE] Sodium ion Na+ µg/kg Ion chromatography Chromatographs & spectrometers Scripps Institution of Oceanography Hydrographic Doppler Sonar System http://vocab.nerc.ac.uk/collection/L22/current/TOOL0884/ Tsushima Akane atsushima@chiba-u.jp Na+ [µg/kg] (Ion chromatography) Chloride Cl- µg/kg chloride http://purl.obolibrary.org/obo/CHEBI_17996 Ion chromatography Chromatographs & spectrometers Scripps Institution of Oceanography Hydrographic Doppler Sonar System http://vocab.nerc.ac.uk/collection/L22/current/TOOL0884/ Tsushima Akane atsushima@chiba-u.jp Cl- [µg/kg] (Ion chromatography) Ammonium [NH4]+ µg/kg ammonium http://purl.obolibrary.org/obo/CHEBI_28938 Ion chromatography Chromatographs & spectrometers Scripps Institution of Oceanography Hydrographic Doppler Sonar System http://vocab.nerc.ac.uk/collection/L22/current/TOOL0884/ Tsushima Akane atsushima@chiba-u.jp [NH4]+ [µg/kg] (Ion chromatography) Potassium K+ µg/kg potassium K Ion chromatography Chromatographs & spectrometers Scripps Institution of Oceanography Hydrographic Doppler Sonar System http://vocab.nerc.ac.uk/collection/L22/current/TOOL0884/ Tsushima Akane atsushima@chiba-u.jp K+ [µg/kg] (Ion chromatography) Magnesium Mg2+ µg/kg magnesium Ion chromatography Chromatographs & spectrometers Scripps Institution of Oceanography Hydrographic Doppler Sonar System http://vocab.nerc.ac.uk/collection/L22/current/TOOL0884/ Tsushima Akane atsushima@chiba-u.jp Mg2+ [µg/kg] (Ion chromatography) Calcium Ca2+ µg/kg calcium Ca https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:22984 Ion chromatography Chromatographs & spectrometers Scripps Institution of Oceanography Hydrographic Doppler Sonar System http://vocab.nerc.ac.uk/collection/L22/current/TOOL0884/ Tsushima Akane atsushima@chiba-u.jp Ca2+ [µg/kg] (Ion chromatography) Nitrate [NO3]- µg/kg nitrate http://purl.obolibrary.org/obo/CHEBI_17632 Ion chromatography Chromatographs & spectrometers Scripps Institution of Oceanography Hydrographic Doppler Sonar System http://vocab.nerc.ac.uk/collection/L22/current/TOOL0884/ Tsushima Akane atsushima@chiba-u.jp [NO3]- [µg/kg] (Ion chromatography) Sulfate [SO4]2- µg/kg sulfate http://purl.obolibrary.org/obo/CHEBI_16189 Ion chromatography Chromatographs & spectrometers Scripps Institution of Oceanography Hydrographic Doppler Sonar System http://vocab.nerc.ac.uk/collection/L22/current/TOOL0884/ Tsushima Akane atsushima@chiba-u.jp [SO4]2- [µg/kg] (Ion chromatography) Tritium 3H TU tritium Catalytic Activity http://dbpedia.org/resource/Catalysis Scintillation Tsushima Akane atsushima@chiba-u.jp coarse resolution 3H [TU] (coarse resolution, Scintillation) Tritium 3H TU tritium Catalytic Activity http://dbpedia.org/resource/Catalysis Scintillation Tsushima Akane atsushima@chiba-u.jp fine resolution 3H [TU] (fine resolution, Scintillation) CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels citable Himalaya Ice core author108836 author108837 author108838 author31969 author45145 author45319 author45416 author70336 author77994 author79858 author81521 curlevel30 event3202743 geocode1599 geocode1600 geocode1601 geocode5059 geocode8128 inst1673 inst21457 inst21846 inst21847 inst21848 inst2518 license21 method11164 method5327 method68 param2936 param5143 param5144 param5145 param5146 param5147 param5148 param6777 param786 param8145 param8148 pi79858 term1073131 term1073135 term1073173 term1073174 term1073200 term1073219 term1073482 term2299500 term38520 term40134 term40665 term41222 term43783 term43863 term43975 term44363 term47590 term47641 term68027