Hatton Jade Elizabeth j.e.hatton@bristol.ac.uk 0000-0002-9408-7981 UK Centre for Ecology & Hydrology UKCEH https://www.ceh.ac.uk/ https://ror.org/00pggkr55 Stehrer-Polášková Anna anna.polaskova@natur.cuni.cz Charles University https://ror.org/024d6js02 Pika Philip pikap@natur.cuni.cz Université Libre de Bruxelles https://ror.org/01r9htc13 Garnett Mark H 0000-0001-6486-2126 National Environmental Isotope Facility, Radiocarbon Laboratory NEIF Klimova Petra petra.vinsova@natur.cuni.cz Charles University https://ror.org/024d6js02 Wentzel Lia costapil@natur.cuni.cz Charles University https://ror.org/024d6js02 Jakub Zarsky jakub.dan.zarsky@gmail.com Charles University https://ror.org/024d6js02 Arndt Sandra 0000-0002-0235-8124 Université Libre de Bruxelles https://ror.org/01r9htc13 Alun Hubbard alun.hubbard@oulu.fi The Arctic University of Norway UiT https://en.uit.no/ https://ror.org/00wge5k78 Jakub Trubac jakub.trubac@gmail.com Charles University https://ror.org/024d6js02 Yde Jacob Western Norway University of Applied Sciences https://ror.org/05phns765 Jon Hawkings hawkings@sas.upenn.edu Department of Earth and Environmental Science, University of Pennsylvania Penn http://www.sas.upenn.edu/earth/ https://ror.org/00b30xv10 Eva Doting eva.doting@nina.no Norwegian Institute for Nature Research NINA https://ror.org/04aha0598 Jack Murphy jgmurphy@sas.upenn.edu Department of Earth and Environmental Science, University of Pennsylvania Penn http://www.sas.upenn.edu/earth/ https://ror.org/00b30xv10 Guillaume Lamarche-Gagnon guillaume.lamarche-gagnon@uit.no The Arctic University of Norway UiT https://en.uit.no/ https://ror.org/00wge5k78 Wadham Jemma The Arctic University of Norway UiT https://en.uit.no/ https://ror.org/00wge5k78 Sarah Sapper s.sapper@iaea.org Department of Geosciences and Natural Resource Management, University of Copenhagen Christiansen Jesper Riis jrc@ign.ku.dk 0000-0002-3277-0734 Department of Geosciences and Natural Resource Management, University of Copenhagen Christian Jorgensen cjj@ecos.au.dk Department of Geosciences and Natural Resource Management, University of Copenhagen Stibal Marek 0000-0002-9998-5086 Charles University https://ror.org/024d6js02 2026 Dissolved Methane release from the western margin of the Greenland Ice Sheet (2021 - 2023) dataset https://doi.pangaea.de/10.1594/PANGAEA.993007 2026-03-30T08:49:53 A field sampling campaign spanning the entire western margin of the Greenland Ice Sheet was conducted in the summer melt seasons of 2021, 2022, and 2023, to measure release of dissolved methane from meltwater streams draining the subglacial environment of the Greenland Ice Sheet. The campaign was designed to assess whether subglacial methane export is ubitiqous from the GrIS, and the source and age of this methane released. Twenty-six rivers draining from the GrIS were sampled in the summers of 2021, 2022 and 2023 along the west coast of Greenland, forming a north to south transect from Qaanaaq to Narsarsuaq. We split these rivers into regional areas of northwest (NW), central west (CW), and southwest (SW). Most of these rivers drained directly from the subglacial environment, whether via an upwelling (proglacial spring) or subglacial portal. Samples were taken as close to the upwelling or portal as possible, to get the most representative view of the subglacial system, with limited off-gassing or dilution effects from supraglacial meltwaters. Basic stream geochemistry (pH, EC, O2) was measured in the field using a WTW 3430 multimeter. Dissolved CH4 was extracted (Garnett et al., 2016) into a nitrogen headspace, via 5L water samples were collected into a 10L accordion water carrier, 1-2L of pure N2 headspace was added and the water carrier was shaken for 3 minutes to equilibrate the CH4. The headspace CH4 concentrations were measured directly in the field using a using a micro portable greenhouse gas analyser (MGGA, ABB GLA1313 Series, using Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS) technology). The headspace with extracted sample was stored in a pre-evacuated 15L Silonite™ cannisters with TrueSeal Valve™ (Entech Instruments) or pre-evacuated 150ml glass serum vials (Wheaton™) using a 150 ml glass syringe and sealed with 15 mm crimped (13mm) chlorobutyl rubber stoppers (Bellco Glass) ahead of radio- and stable- carbon isotope analysis, respectively. We provide measured and 'corrected' radiocarbon ages of dissolved methane. We recognise that the CH4 extracted and measured in each water sample is a homogenised sample, likely containing subglacially produced CH4 combined with some modern CH4, when supraglacial water is routed through moulins to the bed and through the subglacial system. Therefore, it is likely that our water samples encompass some portion of modern-day CH4, and accounting for this provides a more accurate assessment of the 14C-age of the subglacial carbon source for methanogenesis. We used a simple mass balance approach to consider what proportion of our sampled CH4 is potentially modern-day atmospheric, based on the measured atmospheric CH4 concentration measured during a survey of the supraglacial area inland. Garnett Mark H 0000-0001-6486-2126 Gulliver Pauline Pauline.Gulliver@glasgow.ac.uk Billett Michael F 2016 A rapid method to collect methane from peatland streams for radiocarbon analysis journal article Ecohydrology 9(1) https://doi.org/10.1002/eco.1617 113-121 Hatton Jade Elizabeth j.e.hatton@bristol.ac.uk 0000-0002-9408-7981 et al. accepted Extensive Holocene retreat of the Greenland ice sheet revealed by subglacial methane release Nature Geoscience Yarnes Chris 2013 δ 13 C and δ 2 H measurement of methane from ecological and geological sources by gas chromatography/combustion/pyrolysis isotope‐ratio mass spectrometry journal article Rapid Communications in Mass Spectrometry 27(9) https://doi.org/10.1002/rcm.6549 1036-1044 -69.019667 -45.11658 61.14541 77.719667 -50.9813855208333 67.98394490625004 2021-08-05T15:30:00 2023-07-15T18:00:00 Ministry of Education, Youth and Sports https://doi.org/10.13039/501100001823 LL2004 MARCH4G https://www.cryoeco.eu/ MARCH4G_2021_CW4a_Chem 69.329768 -50.244147 2021-08-31T11:20:00 Ilulissat, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_CW4a_GHG-a 69.329768 -50.244147 2021-08-30T16:03:00 Ilulissat, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_CW4a_GHG-b 69.329768 -50.244147 2021-08-31T11:20:00 Ilulissat, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_CW4a_GHG-c 69.329768 -50.244147 2021-09-02T08:43:00 Ilulissat, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_CW5_Chem 69.249883 -49.879465 2021-08-30T17:00:00 Ilulissat, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_CW5_GHG 69.249883 -49.879465 2021-08-30T17:00:00 Ilulissat, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_NW1_Chem 77.719667 -69.019667 2021-08-15T14:00:00 Qaanaaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_NW1_GHG 77.719667 -69.019667 2021-08-13T15:20:00 Qaanaaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_NW2_Chem 2021-08-14T14:30:00 Qaanaaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_NW2_GHG 77.71525 -68.91677 2021-08-14T14:30:00 Qaanaaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW3a_Chem_a 67.180635 -50.336008 2021-09-06T15:23:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_SW3a_GHG_a 67.180635 -50.336008 2021-09-06T15:23:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW3a_GHG_b 67.180635 -50.336008 2021-09-07T14:14:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW3a_GHG_c 67.180635 -50.336008 2021-09-08T11:06:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW3a_GHG_d 67.180635 -50.336008 2021-09-09T11:40:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW4_14C 67.159 -50.129306 2021-09-04T17:00:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Silonite canister MARCH4G_2021_SW4_Chem 67.159 -50.129306 2021-09-04T17:00:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_SW4_GHG 67.159 -50.129306 2021-09-04T17:00:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW5a_Chem 67.15968 -50.0503 2021-08-05T13:30:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_SW5a_GHG 67.15968 -50.0503 2021-08-05T13:30:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW5b_14C 67.15968 -50.0503 2021-08-07T12:30:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Silonite canister MARCH4G_2021_SW5b_Chem 67.15968 -50.0503 2021-08-07T12:30:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_SW5b_GHG 67.15968 -50.0503 2021-08-07T12:30:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW5c_Chem 67.15968 -50.0503 2021-09-03T16:55:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_SW5c_GHG 67.15968 -50.0503 2021-09-03T16:55:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW6a_Chem 67.064807 -50.161167 2021-09-11T15:00:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2021_SW6a_GHG 67.064807 -50.161167 2021-09-11T15:00:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW7_GHG-a 67.05626 -50.16009 2021-09-06T19:12:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW7_GHG-b 67.05626 -50.16009 2021-09-07T14:11:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2021_SW7_GHG-c 67.05626 -50.16009 2021-09-09T15:54:00 Kangerlussuaq, Greenland MARCH4G_2021 Stibal, Marek 2021-08-13 2021-09-09 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_CW1_Chem 69.77666 -50.32611 2022-09-05T09:00:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_CW1_GHG 69.77666 -50.32611 2022-09-05T09:00:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_CW2_Chem 69.7875 -50.21611 2022-09-05T09:30:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_CW2_GHG 69.7875 -50.21611 2022-09-05T09:30:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_CW3_Chem 69.5775 -50.39416 2022-09-05T10:15:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_CW3_GHG 69.5775 -50.39416 2022-09-05T10:15:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_CW4c_Chem 69.5369 -50.4138 2022-09-05T10:50:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_CW4c_GHG 69.5369 -50.4138 2022-09-05T10:50:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_CW6_Chem 68.88638 -50.4675 2022-09-05T12:00:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_CW6_GHG 68.88638 -50.4675 2022-09-05T12:00:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_CW7_Chem 68.77972 -50.59417 2022-09-05T12:35:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_CW7_GHG 68.77972 -50.59417 2022-09-05T12:35:00 Ilulissat, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_NW3_14C 72.65713 -54.0292 2022-07-22T12:30:00 Upernavik, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Silonite canister MARCH4G_2022_NW3_Chem 72.65713 -54.0292 2022-07-22T12:30:00 Upernavik, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_NW3_GHG_a 72.65713 -54.0292 2022-07-22T12:30:00 Upernavik, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_NW3_GHG_b 72.65713 -54.0292 2022-07-23T09:00:00 Upernavik, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_NW4_14C 72.35803 -53.5122 2022-07-20T20:30:00 Upernavik, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Silonite canister MARCH4G_2022_NW4_Chem 72.35803 -53.5122 2022-07-20T20:30:00 Upernavik, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_NW4_GHG_a 72.35803 -53.5122 2022-07-20T20:30:00 Upernavik, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_NW4_GHG_b 72.35803 -53.5122 2022-07-21T00:49:00 Upernavik, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW1_Chem 68.35416 -50.46639 2022-09-08T16:35:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW1_GHG 68.35416 -50.46639 2022-09-08T16:35:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW2_Chem 67.60222 -50.12694 2022-09-08T15:45:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW2_GHG 67.60222 -50.12694 2022-09-08T15:45:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW3a_Chem 67.180635 -50.336008 2022-09-08T15:15:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW3a_GHG 67.180635 -50.336008 2022-09-08T15:15:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW3b_14C 67.1803 -50.3343 2022-07-10T11:45:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Silonite canister MARCH4G_2022_SW3b_Chem 67.1803 -50.3343 2022-07-10T11:45:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW3b_GHG 67.1803 -50.3343 2022-07-10T11:45:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW3c_GHG-a 67.17771 -50.3533 2022-07-09T23:11:37 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW3c_GHG-b 67.17771 -50.3533 2022-07-11T14:55:06 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW3d_Chem 67.1803 -50.3343 2022-08-15T14:00:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW3d_GHG 67.1803 -50.3343 2022-08-15T14:00:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW3e_Chem 67.40694 -50.448 2022-09-08T15:15:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW3e_GHG 67.40694 -50.448 2022-09-08T15:15:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW5d_Chem 67.15968 -50.0503 2022-07-13T14:30:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW5d_GHG 67.15968 -50.0503 2022-07-13T14:30:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW6c_Chem 67.27472 -50.245 2022-09-07T11:50:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW6c_GHG 67.27472 -50.245 2022-09-07T11:50:00 Kangerlussuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW8_Chem 67.191 -50.21972 2022-09-08T10:20:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW8_GHG 67.191 -50.21972 2022-09-08T10:20:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW9_Chem 66.73027 -50.02638 2022-09-08T10:55:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW9_GHG 66.73027 -50.02638 2022-09-08T10:55:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW10_Chem 66.5625 -49.84805 2022-09-08T11:35:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW10_GHG 66.5625 -49.84805 2022-09-08T11:35:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW11_Chem 65.89472 -50.733 2022-09-08T13:10:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW11_GHG 65.89472 -50.733 2022-09-08T13:10:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW12_Chem 65.19899 -50.6738 2022-07-31T23:50:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW12_GHG-a 65.19899 -50.6738 2022-07-31T23:50:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW12_GHG-b 65.19899 -50.6738 2022-08-01T11:35:10 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW12_GHG-c 65.19899 -50.6738 2022-08-01T14:00:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW13_Chem 61.14541 -46.1282 2022-08-04T17:00:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW13_GHG 61.14541 -46.1282 2022-08-04T17:00:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW14a_Chem 61.4273 -45.13174 2022-08-07T18:10:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW14a_GHG 61.4273 -45.13174 2022-08-07T18:10:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW14b_GHG 61.4286 -45.13449 2022-08-08T19:00:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2022_SW15_Chem 61.42386 -45.11658 2022-08-08T15:00:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2022_SW15_GHG 61.42386 -45.11658 2022-08-08T15:00:00 Narsarsuaq, Greenland MARCH4G_2022 Stibal, Marek 2022-07-10 2022-09-08 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2023_CW4b_Chem 69.33613 -50.23464 2023-07-15T16:00:00 Ilulissat, Greenland MARCH4G_2023 Stibal, Marek 2023-07-09 2023-07-15 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2023_CW4b_GHG 69.33613 -50.23464 2023-07-15T16:00:00 Ilulissat, Greenland MARCH4G_2023 Stibal, Marek 2023-07-09 2023-07-15 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2023_SW6b_14C 67.0648 -50.1609 2023-07-09T18:20:00 Kangerlussuaq, Greenland MARCH4G_2023 Stibal, Marek 2023-07-09 2023-07-15 Silonite canister MARCH4G_2023_SW6b_Chem 67.0648 -50.1609 2023-07-09T18:20:00 Kangerlussuaq, Greenland MARCH4G_2023 Stibal, Marek 2023-07-09 2023-07-15 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2023_SW6b_GHG 67.0648 -50.1609 2023-07-09T18:20:00 Kangerlussuaq, Greenland MARCH4G_2023 Stibal, Marek 2023-07-09 2023-07-15 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 MARCH4G_2023_SW7_14C 67.05626 -50.16009 2023-07-10T15:34:00 Kangerlussuaq, Greenland MARCH4G_2023 Stibal, Marek 2023-07-09 2023-07-15 Silonite canister MARCH4G_2023_SW7_Chem 67.05626 -50.16009 2023-07-10T15:34:00 Kangerlussuaq, Greenland MARCH4G_2023 Stibal, Marek 2023-07-09 2023-07-15 Portable 2-channel multimeter, Hach, HQ40D Hach HQ40D - Multi 2 Channels Portable Two Channel Multi Meter http://vocab.nerc.ac.uk/collection/L22/current/TOOL1481/ MARCH4G_2023_SW7_GHG-a 67.05626 -50.16009 2023-07-10T15:34:00 Kangerlussuaq, Greenland MARCH4G_2023 Stibal, Marek 2023-07-09 2023-07-15 Microportable Greenhouse Gas Analyzer https://sensor.awi.de/?id=7276 370 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Event label Event Event DATE/TIME Date/Time http://en.wikipedia.org/wiki/ISO_8601 Time T http://dbpedia.org/resource/Time Date/Time Date/Time local Date/Time local https://en.wikipedia.org/wiki/ISO_8601 Date/Time local LATITUDE Latitude http://en.wikipedia.org/wiki/ISO_6709 Latitude LONGITUDE Longitude http://en.wikipedia.org/wiki/ISO_6709 Longitude pH pH Portable multimeter, Hach, HQ4300 pH (Portable multimeter, Hach, HQ...) Conductivity Cond mS/cm https://en.wikipedia.org/wiki/Electrical_conductivity conductivity http://purl.obolibrary.org/obo/PATO_0001585 Portable multimeter, Hach, HQ4300 Cond [mS/cm] (Portable multimeter, Hach, HQ...) Oxygen O2 mg/l oxygen O https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:25805 Density http://dbpedia.org/resource/Density Portable multimeter, Hach, HQ4300 O2 [mg/l] (Portable multimeter, Hach, HQ...) Methane, dissolved CH4 diss nmol/l methane http://purl.obolibrary.org/obo/CHEBI_16183 dissolved http://purl.obolibrary.org/obo/PATO_0001986 Molar Concentration Off-axis integrated cavity output spectroscopy (OA-ICOS) gas analyzer Average calculated CH4 diss [nmol/l] (Average calculated, Off-axis ...) Methane, dissolved CH4 diss nmol/l methane http://purl.obolibrary.org/obo/CHEBI_16183 dissolved http://purl.obolibrary.org/obo/PATO_0001986 Molar Concentration Off-axis integrated cavity output spectroscopy (OA-ICOS) gas analyzer Minimum CH4 diss [nmol/l] (Minimum, Off-axis integrated ...) Methane, dissolved CH4 diss nmol/l methane http://purl.obolibrary.org/obo/CHEBI_16183 dissolved http://purl.obolibrary.org/obo/PATO_0001986 Molar Concentration Off-axis integrated cavity output spectroscopy (OA-ICOS) gas analyzer Maximum CH4 diss [nmol/l] (Maximum, Off-axis integrated ...) Activity of radiocarbon in percent of modern carbon Activity pMC Activity http://dbpedia.org/resource/Radioactive_decay radiocarbon percent Age, 14C AMS https://doi.org/10.1146/annurev.ns.30.120180.002253 accelerator mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB17/ Chromatographs & spectrometers Uncorrected 14C-CH4 Activity [pMC] (Uncorrected 14C-CH4, Age, 14C...) Activity of radiocarbon in percent of modern carbon, standard deviation Activity std dev ± Activity http://dbpedia.org/resource/Radioactive_decay radiocarbon percent standard deviation std dev https://en.wikipedia.org/wiki/Standard_deviation Age, 14C calibrated, OxCal 4.4 and IntCal20 https://c14.arch.ox.ac.uk/oxcal.html Uncorrected 14C-CH4 Activity std dev [±] (Uncorrected 14C-CH4, Age, 14C...) Age, dated, range, minimum Age dated min ka age http://purl.obolibrary.org/obo/PATO_0000011 minimum Time T http://dbpedia.org/resource/Time Age, 14C calibrated, IntCal20 (Reimer et al. 2020) https://doi.org/10.1017/RDC.2020.41 Uncorrected 14C-CH4 Age dated min [ka] (Uncorrected 14C-CH4, Age, 14C...) Age, dated, range, maximum Age dated max ka age http://purl.obolibrary.org/obo/PATO_0000011 maximum Time T http://dbpedia.org/resource/Time Age, 14C calibrated, IntCal20 (Reimer et al. 2020) https://doi.org/10.1017/RDC.2020.41 Uncorrected 14C-CH4 Age dated max [ka] (Uncorrected 14C-CH4, Age, 14C...) Activity of radiocarbon in percent of modern carbon Activity pMC Activity http://dbpedia.org/resource/Radioactive_decay radiocarbon percent Age, 14C AMS https://doi.org/10.1146/annurev.ns.30.120180.002253 accelerator mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB17/ Chromatographs & spectrometers Atmospheric corrected Activity [pMC] (Atmospheric corrected, Age, 1...) Age, dated, range, minimum Age dated min ka age http://purl.obolibrary.org/obo/PATO_0000011 minimum Time T http://dbpedia.org/resource/Time Age, 14C calibrated, IntCal20 (Reimer et al. 2020) https://doi.org/10.1017/RDC.2020.41 Atmospheric corrected Age dated min [ka] (Atmospheric corrected, Age, 1...) Age, dated, range, maximum Age dated max ka age http://purl.obolibrary.org/obo/PATO_0000011 maximum Time T http://dbpedia.org/resource/Time Age, 14C calibrated, IntCal20 (Reimer et al. 2020) https://doi.org/10.1017/RDC.2020.41 Atmospheric corrected Age dated max [ka] (Atmospheric corrected, Age, 1...) δ13C, methane, dissolved δ13C CH4 diss ‰ PDB δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes methane http://purl.obolibrary.org/obo/CHEBI_16183 dissolved http://purl.obolibrary.org/obo/PATO_0001986 GasBench+PreCon trace gas concentration system (ThermoFinnigan) coupled to a DELTA V plus IRMS δ13C CH4 diss [‰ PDB] (GasBench+PreCon trace gas con...) δ Deuterium, methane δD CH4 ‰ SMOW https://en.wikipedia.org/wiki/Deuterium methane http://purl.obolibrary.org/obo/CHEBI_16183 GasBench+PreCon trace gas concentration system (ThermoFinnigan) coupled to a DELTA V plus IRMS δD CH4 [‰ SMOW] (GasBench+PreCon trace gas con...) CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels dissolved methane glacial melt Glacial release Greenland ice sheet Holocene climate Methane Radiocarbon AMS dating stable carbon isotopes author115880 author115881 author115882 author115883 author115884 author115885 author115886 author115887 author115888 author115889 author115890 author115891 author115892 author115910 author27272 author47523 author64135 author66004 author67568 author67570 author69702 author84473 author84517 author85372 award4910 campaign53375 campaign53376 campaign53377 curlevel30 event3361127 event3361128 event3361129 event3361130 event3361131 event3361132 event3361133 event3361134 event3361135 event3361136 event3361137 event3361138 event3361139 event3361140 event3361141 event3361142 event3361143 event3361144 event3361145 event3361146 event3361147 event3361148 event3361149 event3361150 event3361151 event3361152 event3361153 event3361154 event3361155 event3361156 event3361157 event3361158 event3361159 event3361160 event3361161 event3361162 event3361163 event3361164 event3361165 event3361166 event3361167 event3361168 event3361169 event3361170 event3361171 event3361172 event3361173 event3361174 event3361175 event3361176 event3361177 event3361178 event3361179 event3361180 event3361181 event3361182 event3361183 event3361184 event3361185 event3361186 event3361187 event3361188 event3361189 event3361190 event3361191 event3361192 event3361193 event3361194 event3361195 event3361196 event3361197 event3361198 event3361199 event3361200 event3361201 event3361202 event3361203 event3361204 event3361205 event3361206 event3361207 event3361208 event3361209 event3361210 event3361211 event3361212 event3361213 event3361214 event3361215 event3361216 event3361217 event3361218 event3361219 event3361220 event3361221 event3361222 funder20777 geocode1599 geocode1600 geocode1601 inst1118 inst20561 inst21778 inst21817 inst21920 inst22012 inst22661 inst22662 inst2822 journal11670 journal13689 journal4671 license21 method13099 method13352 method13926 method15067 method18838 method18866 method18880 method18909 method58 param132358 param162991 param171793 param1882 param190760 param507648 param508172 param6169 param6170 param764 param8151 ref138480 ref138482 ref138483 term1073089 term1073135 term1073162 term1073493 term1073620 term2299417 term2664259 term33573 term37764 term38492 term38494 term41019 term41079 term41080 term43761 term43792 term43975 term44030 term47444 term48477 term49923 term49926 term52004 term67234 term68027 term73536 term76294 term76721 term77269 term77270 term77290