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Mellat, Moein; Meyer, Hanno; Werner, Martin; Brunello, Camilla F; Granskog, Mats A; Damm, Ellen; Bauch, Dorothea; Weiner, Mikaela; Marent, Andreas (2023): Stable water isotopes of sea ice at Main Coring Site (MCS) during MOSAiC expedition [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.958466

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Abstract:
Sea ice cores were collected from the Biogeochemistry (BGC) team at different stations located on the main ice floe of MOSAiC expedition. Flat sea ice on the floe was categorized into three types based on the age: sea ice which grew during the same winter referred to as First-Year-Ice (FYI); sea ice which had survived one or more summer melting periods referred to as Second-Year-Ice (SYI). Sea ice cores were collected using a Kovacs Mark II 9 cm diameter corer. The core was extracted and placed in an aluminum holder equipped with a metric ruler. Using a standard Kovacs ice thickness gauge, the freeboard was taken and the length of the core was measured. The snow on top of the sea ice was brushed off the top of the cores to minimize the snow affecting the ice surface. Onboard RV Polarstern, the cores were cut in 10 cm sections using a handsaw at 4° C (leg 1) or an electric saw at -20° C (legs 2 and 3). Each section was transferred into a gas-tight TedlarTM bag. The closed bags were carefully degassed with a vacuum pump (NKF Neuberger, type N035). Melting occurred within 12 to 15 hours in a water bath in the dark. After shaking the melted ice within the TedlarTM bags, discrete sampling started by first rising the melt water carefully through a Tygon tube connected with the opened valves of the gas tide bags and then into prepared sample vials. Here we present the data from samples collected at Main Core Site (MCS) at the Dark Sector (DS).
Oxygen and hydrogen isotope analyses were carried out at the ISOLAB Facility at AWI Potsdam (https://hdl.handle.net/10013/sensor.ddc92f54-4c63-492d-81c7-696260694001) with mass spectrometers (DELTA-S Finnigan MAT, USA): https://hdl.handle.net/10013/sensor.af148dea-fe65-4c87-9744-50dc4c81f7c9 https://hdl.handle.net/10013/sensor.62e86761-9fae-4f12-9c10-9b245028ea4c employing the equilibration method (details in Meyer et al., 2000). δ18O and δD values were given in per mil (‰) vs. Vienna standard mean ocean water (V-SMOW) as the standard. The second order parameter d excess was computed according to: d excess = δD-8 δ18O (Dansgaard, 1964).
Keyword(s):
Mosaic; Sea ice
Related to:
References:
Dansgaard, W (1964): Stable isotopes in precipitation. Tellus, 16(4), 436-468, https://doi.org/10.3402/tellusa.v16i4.8993
Meyer, Hanno; Schönicke, Lutz; Wand, Ulrich; Hubberten, Hans-Wolfgang; Friedrichsen, Hans (2000): Isotope Studies of Hydrogen and Oxygen in Ground Ice - Experiences with the Equilibration Technique. Isotopes in Environmental and Health Studies, 36(2), 133-149, https://doi.org/10.1080/10256010008032939
Additional metadata:
SENSOR (2022): Metadata for mass spectrometer Finnigan Delta-S mass spectrometer (BERTA) at Current Version. Alfred Wegener Institut Helmholtz Centre for Polar and Marine Research, hdl:10013/sensor.62e86761-9fae-4f12-9c10-9b245028ea4c
SENSOR (2022): Metadata for mass spectrometer Finnigan Delta-S mass spectrometer (DIFE) at Current Version. Alfred Wegener Institut Helmholtz Centre for Polar and Marine Research, hdl:10013/sensor.af148dea-fe65-4c87-9744-50dc4c81f7c9
SENSOR: Metadata for laboratory ISOLAB Facility - Stable Isotope Laboratory Potsdam at Current Version. Alfred Wegener Institut Helmholtz Centre for Polar and Marine Research, hdl:10013/sensor.ddc92f54-4c63-492d-81c7-696260694001
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
Federal Ministry of Education and Research (BMBF), grant/award no. 03F0869A: MOSAiC 1 CiASOM: Verwendung von stabilen Wasserisotopen für ein besseres Verständnis des arktischen Wasserkreislaufs
German Research Foundation (DFG), grant/award no. 429838323: Interplay between seasonal arctic sea-ice processes and halocline stability - towards understanding arctic gas and matter fluxes
Coverage:
Median Latitude: 85.718543 * Median Longitude: 80.130550 * South-bound Latitude: 83.886008 * West-bound Longitude: 14.130862 * North-bound Latitude: 87.452347 * East-bound Longitude: 126.391473
Date/Time Start: 2019-10-28T00:00:00 * Date/Time End: 2020-05-04T00:00:00
Minimum DEPTH, ice/snow: 0.000 m * Maximum DEPTH, ice/snow: 2.590 m
Event(s):
PS122/1_5-3 * Latitude: 85.553402 * Longitude: 126.362183 * Date/Time: 2019-10-28T02:29:00 * Elevation: -4379.5 m * Sensor URI: sensor.awi.de * Campaign: PS122/1 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: temp: be1; salo18: s18; CH4: CH4; HAlO: halo; iso: iso; bromo: bromo; CHLA: eco1a; Prod: eco1b; pigs: eco1c; algae: eco1d; Be2: Be2; DIC/TA: DIC; Be3: be3; Tex: tex; DNA1: eco2a; DNA2: eco2b; RNA: eco2c; PLASTic: PLT; REPository: REP; backup: bac; meio1: meio1
PS122/1_5-78 * Latitude: 85.551309 * Longitude: 126.326096 * Date/Time: 2019-10-28T01:05:00 * Elevation: -4379.2 m * Sensor URI: sensor.awi.de * Campaign: PS122/1 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: temperature: T; 2nd temperature core as measurement were too slow for T: T2; S nutrient isotope: SALO 18; ECO1A: ECO1A; ECO1D: ECO1D; ECO1C: ECO1C; ECO1B: ECO1B; texture: TEX; DIC/TA: DIC; ECO2A: ECO2A; ECO2B: ECO2B; ECO2C: ECO2C; only bottom 10: MEIO; Repository: REP; CT using 9cm rather than 7cm as ice shatters: CT; RHO using 9cm rather than 7cm as ice shatters: RHO
PS122/1_5-81 * Latitude: 85.552321 * Longitude: 126.391473 * Date/Time: 2019-10-28T03:30:00 * Elevation: -4379.5 m * Sensor URI: sensor.awi.de * Campaign: PS122/1 (MOSAiC20192020) * Basis: Polarstern * Method/Device: Ice corer (IC) * Comment: Temperature core collected in raft ridged near to SYI Dark Site: 20191028-PS122-1_5-RI-TRAFT
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventMellat, Moein
2Sample code/labelSample labelMellat, MoeinAdditional lable on bottle
3Station labelStationMellat, Moein
4Sample IDSample IDMellat, MoeinISOLAB_ID
5DATE/TIMEDate/TimeMellat, MoeinGeocode
6Sample typeSamp typeMellat, Moein
7DEPTH, ice/snowDepth ice/snowmMellat, MoeinGeocode – minimum/top
8DEPTH, ice/snowDepth ice/snowmMellat, MoeinGeocode – maximum/bottom
9SalinitySalMellat, Moeinpsu
10δ18O, waterδ18O H2O‰ SMOWMellat, MoeinMass spectrometer Finnigan MAT Delta-S (ISOLAB)
11δ Deuterium, waterδD H2O‰ SMOWMellat, MoeinMass spectrometer Finnigan MAT Delta-S (ISOLAB)
12Deuterium excessd xsMellat, MoeinCalculated after Dansgaard (1964)
Change history:
2023-09-13T06:31:21 – An error in the dataset title was corrected. The original title was "Stable water isotopes of sea ice at Multiple Coring Stations (MCS) during MOSAiC expedition".
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
2179 data points

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