Salganik, Evgenii; Fons, Steven W; Heitmann, Laura; Hoppe, Clara Jule Marie; Schneebeli, Martin; Torstensson, Anders; Ulfsbo, Adam; Granskog, Mats A (2025): Ridge ice salinity, temperature, density, oxygen and hydrogen isotope composition from the Ridgey McRidgeFace (RMRF) ridge site during MOSAiC leg 3 in April-May 2020 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.979884 (DOI registration in progress)
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Published: 2025-03-28
Abstract:
Sea-ice thickness, salinity, temperature, density, and stable water isotope composition were measured during surveys at the Ridgey McRidgeFace (RMRF) coring site during the MOSAiC expedition (leg 3). RMRF was a first-year ice ridge formed in March 2020. The ice cores were extracted either with a 9-cm (Mark II) or 7.25-cm (Mark III) internal diameter ice corers (Kovacs Enterprise, US). This data set includes data from coring site visits performed on 22 April 2020 and 05 May 2020 at RMRF in the MOSAiC Central Observatory (Kanzow and Damm, 2023). During each coring event, ice temperature was measured in situ from a separate temperature core, using Testo 720 thermometers in drill holes with a length of half-core-diameter at 5-cm vertical resolution. Ice bulk practical salinity was measured from melted core sections at 5-cm resolution using a YSI 30 conductivity meter. Ice density was measured using the hydrostatic weighing method (Pustogvar and Kulyakhtin, 2016) from a density core in the freezer laboratory onboard Polarstern at the temperature of -(16–18)°C. Relative volumes of brine and gas were estimated from ice salinity, temperature, and density using Cox and Weeks (1983) for ice colder than -2°C and Leppäranta and Manninen (1988) for ice warmer than -2°C.
The data contains the event label (1), time (2), and global coordinates (3,4) of each coring measurement, coring site (5), and core type (6). Each core has its manually measured ice thickness (7), ice core length (8), and mean snow height (9). Each core section has the total length of its middle (10), top (11), and bottom (12) measured in situ. Each core section has the value of its practical salinity (13), as well as sea ice temperature (14), laboratory temperature (15), and ice density at the laboratory (16) and in situ (17) temperatures, brine volume fraction estimates (18), and gas volume fraction estimates at the laboratory (19) and in situ (20) temperatures. Some core sections have stable water isotopic values (21, 22). The location of ice sections relative to the nearby ridge void is described in comment (23). The locations of the coring sites are shown on the digital elevation map (Hutter et al., 2023).
The stable oxygen isotopic compositions of the melted snow samples (δ18O) were determined in the central laboratory of the Swiss Federal Institute for Forest, Snow and Landscape, Birmensdorf, Switzerland with an Isotopic Water Analyzer IWA-45-ER (ABB - Los Gatos Research Inc., US). Measurement uncertainty for δ18O is ±1‰, the precision ± 0.5‰. All samples were measured in duplicate and averaged. The quality control was conducted with three standards for δ18O at 0.00‰, -12.34‰ and -55.50‰ and are presented as per mil difference relative to VSMOW (‰, Vienna Standard Mean Ocean Water).
Keyword(s):
References:
Cox, G F N; Weeks, W F (1983): Equations for Determining the Gas and Brine Volumes in Sea-Ice Samples. Journal of Glaciology, 29(102), 306-316, https://doi.org/10.3189/S0022143000008364
Hutter, Nils; Hendricks, Stefan; Jutila, Arttu; Birnbaum, Gerit; von Albedyll, Luisa; Ricker, Robert; Haas, Christian (2023): Merged grids of sea-ice or snow freeboard from helicopter-borne laser scanner during the MOSAiC expedition, version 1 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.950896
Kanzow, Torsten; Damm, Ellen (2023): The Expedition PS122/3 of the Research Vessel POLARSTERN to the Arctic Ocean in 2020. (preprint) Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, hdl:10013/epic.58b0f57c-f075-4b24-8b76-07d3f0eec87d
Leppäranta, Matti; Manninen, Terhikki (1988): The brine and gas content of sea ice with attention to low salinities and high temperatures. Helsinki, Finland: Finnish Institute of Marine Research, https://hdl.handle.net/1834/23905
Pustogvar, A; Kulyakhtin, A (2016): Sea ice density measurements. Methods and uncertainties. Cold Regions Science and Technology, 131, 46-52, https://doi.org/10.1016/j.coldregions.2016.09.001
Further details:
Project(s):
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AFMOSAiC-1_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PS122_00: Multidisciplinary drifting Observatory for the Study of Arctic Climate / MOSAiC
The Research Council of Norway (RCN), grant/award no. 280292: Ridges - Safe HAVens for ice-associated Flora and Fauna in a Seasonally ice-covered Arctic OCean
The Research Council of Norway (RCN), grant/award no. 328957: air-snow-ice-ocean INTERactions transforming Atlantic Arctic Climate (INTERAAC)
Coverage:
Median Latitude: 84.025338 * Median Longitude: 16.965995 * South-bound Latitude: 83.922626 * West-bound Longitude: 15.923756 * North-bound Latitude: 84.118383 * East-bound Longitude: 18.116518
Date/Time Start: 2020-04-22T12:07:00 * Date/Time End: 2020-05-05T12:54:48
Minimum DEPTH, ice/snow: 0.0250 m * Maximum DEPTH, ice/snow: 1.9000 m
Event(s):
PS122/3_37-32 * Latitude: 84.118383 * Longitude: 15.923756 * Date/Time: 2020-04-22T11:25:00 * O2A Registry URI: registry.o2a-data.de * Location: Arctic Ocean * Campaign: PS122/3 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: CH4: BGC2; ISO: BGC2; ECO1: rmrf: eco1; SALO18: rmrf:salo18
PS122/3_39-104 * Latitude: 83.922626 * Longitude: 18.116518 * Date/Time: 2020-05-05T10:54:00 * O2A Registry URI: registry.o2a-data.de * Location: Arctic Ocean * Campaign: PS122/3 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: ridgy mcridgeface ridge coring for HAVOC; SALO18 - Also TEMP - RMRF
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Granskog, Mats A | |||
| 2 | DATE/TIME | Date/Time | Granskog, Mats A | Geocode | ||
| 3 | LATITUDE | Latitude | Granskog, Mats A | Geocode – coordinates of the ice coring site at the time of sampling | ||
| 4 | LONGITUDE | Longitude | Granskog, Mats A | Geocode – coordinates of the ice coring site at the time of sampling | ||
| 5 | Site | Site | Granskog, Mats A | |||
| 6 | Core | Core | Granskog, Mats A | |||
| 7 | Sea ice thickness | EsEs | m | Granskog, Mats A | Ice thickness gauge (ICEGAUGE) | Distance from the top of ice to the bottom of the ice |
| 8 | Core length | Core length | m | Granskog, Mats A | Tape measure | Total length of the extracted ice core |
| 9 | Snow height | Snow h | m | Granskog, Mats A | Tape measure | Average snow depth at coring site |
| 10 | DEPTH, ice/snow | Depth ice/snow | m | Granskog, Mats A | Tape measure | Geocode – middle of ice layer sampled, measured from the ice surface |
| 11 | Depth, ice/snow, top/minimum | Depth ice/snow top | m | Granskog, Mats A | Tape measure | top of ice layer sampled, measured from the ice surface |
| 12 | Depth, ice/snow, bottom/maximum | Depth ice/snow bot | m | Granskog, Mats A | Tape measure | bottom of ice layer sampled, measured from the ice surface |
| 13 | Sea ice salinity | Sea ice sal | Granskog, Mats A | Salinometer, inductive | Practical salinity measured after melting | |
| 14 | Temperature, ice/snow | t | °C | Granskog, Mats A | Thermometer | |
| 15 | Temperature, technical | T tech | °C | Granskog, Mats A | Thermometer | laboratory temperature |
| 16 | Density, ice | Density ice | kg/m3 | Granskog, Mats A | Hydrostatic weighing | prime; Sea ice density measured at laboratory temperature of -15C |
| 17 | Density, ice | Density ice | kg/m3 | Granskog, Mats A | Calculated | Sea ice density calculated from the measured salinity, density and temperature |
| 18 | Volume, brine | Vol brine | % | Granskog, Mats A | Calculated | Liquid brine volume fraction calculated from the measured sea ice salinity and temperature |
| 19 | Volume, gas | Vol gas | % | Granskog, Mats A | Calculated | prime |
| 20 | Volume, gas | Vol gas | % | Granskog, Mats A | Calculated | Gas volume fraction calculated from the measured sea ice salinity, density, and temperature |
| 21 | δ18O, water | δ18O H2O | ‰ SMOW | Schneebeli, Martin | Isotopic Water Analyzer IWA-45-ER (ABB - Los Gatos Research Inc., US), Swiss Federal Institute for Forest, Snow and Landscape, Birmensdorf | |
| 22 | δ Deuterium, water | δD H2O | ‰ SMOW | Schneebeli, Martin | Isotopic Water Analyzer IWA-45-ER (ABB - Los Gatos Research Inc., US), Swiss Federal Institute for Forest, Snow and Landscape, Birmensdorf | |
| 23 | Comment | Comment | Granskog, Mats A | location relative to the void |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
2035 data points
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