Stable water isotopes and conductivities of a lead case study during leg 5 of the MOSAiC expedition

DOI

The dataset comprises stable water isotopes and conductitities of a lead case study during leg 5 of the MOSAiC campaign.Samples have been taken from different water and ice types for this lead case study. Discrete water samples were taken using a peristaltic pump (Masterflex E/S Portable Sampler, Masterflex, USA) through a 2 m long PTFE tube (L/S Pump Tubing, Masterflex, USA). Water samples for measurement of stable water isotopes (δ18O, δD,) were collected in 50-mL glass screw-cap narrow-neck vials (VWR international LLC, Germany). Snow on the sea ice was sampled with a polyethylene shovel (GL Science Inc., Tokyo, Japan) and placed into a polyethylene zip-loc bag. Ice in the lead was collected and a 0.25 m ' 0.25 m ice block was cut with a hand saw and placed into a zip-lock bag. Ice temperature at the surface was measured with a needle-type temperature sensor (Testo 110 NTC, Brandt Instruments, Inc., USA). Two ice cores from the bottom of a melt pond were collected, using an ice corer with an inner diameter of 0.09 m (Mark II coring system, KOVACS Enterprises, Inc., USA). The cores were cut with a stainless steel saw into 0.1 m thick sections and stored in plastic bags for subsequent salinity and δ18O measurements. Snow and ice samples were immediately placed in a cooler box along with refrigerants to keep their temperature low and to minimize brine drainage. Onboard Polarstern, ice samples were transferred into ice melting bags (Smart bags PA, AAK 5L, GL Sciences Inc., Japan) and melted in the dark at +4°C. After the ice melted, the meltwater was placed in a 30-mL glass screw-cap vial for later stable water isotope measurement and into a 100-mL polypropylene bottle (I-Boy, AS ONE Corporation, Japan) for later salinity measurement. These samples were stored at +4°C in the dark until analysis. Under-ice water samples (from about 10 m depth) were collected via R/V Polarstern's underway water sampling system during leg 5. Samples were placed into 250-mL glass vials (Duran Co. Ltd, Germany) for later δ18O and salinity measurements.Salinity of collected samples was determined with a same conductivity sensor used on sea ice (Cond 315i, WTW GmbH, Germany). Oxygen and hydrogen isotope analyses were carried out at the ISOLAB Facility at AWI Potsdam (hdl:10013/sensor.ddc92f54-4c63-492d-81c7-696260694001) with mass spectrometers (DELTA-S Finnigan MAT, USA): hdl:10013/sensor.af148dea-fe65-4c87-9744-50dc4c81f7c9 and hdl: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).

Identifier
DOI https://doi.org/10.1594/PANGAEA.945285
Related Identifier IsSupplementTo https://doi.org/10.1525/elementa.2022.00102
Related Identifier IsDocumentedBy https://doi.org/10.3402/tellusa.v16i4.8993
Related Identifier IsDocumentedBy https://doi.org/10.1080/10256010008032939
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.945285
Provenance
Creator Meyer, Hanno ORCID logo; Mellat, Moein ORCID logo; Nomura, Daiki; Damm, Ellen ORCID logo; Bauch, Dorothea ORCID logo; Weiner, Mikaela; Marent, Andreas
Publisher PANGAEA
Publication Year 2022
Funding Reference Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven https://doi.org/10.13039/501100003207 Crossref Funder ID AFMOSAiC-1_00 Multidisciplinary drifting Observatory for the Study of Arctic Climate; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven https://doi.org/10.13039/501100003207 Crossref Funder ID AWI_PS122_00 Multidisciplinary drifting Observatory for the Study of Arctic Climate / MOSAiC; Federal Ministry of Education and Research https://doi.org/10.13039/501100002347 Crossref Funder ID 03F0869A https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F0869A MOSAiC 1 CiASOM: Verwendung von stabilen Wasserisotopen für ein besseres Verständnis des arktischen Wasserkreislaufs; Japan Society for the Promotion of Science https://doi.org/10.13039/501100001691 Crossref Funder ID JP18H03745 JP18H03745; Japan Society for the Promotion of Science https://doi.org/10.13039/501100001691 Crossref Funder ID JP18KK0292 https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18KK0292/ Joint research between Germany and Japan on the Arctic moistening
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 838 data points
Discipline Earth System Research
Spatial Coverage (99.006W, 88.033S, 120.798E, 89.066N); Arctic Ocean
Temporal Coverage Begin 2020-08-22T00:00:00Z
Temporal Coverage End 2020-09-24T00:00:00Z