Dissolved radiogenic neodymium isotopes, stable oxygen isotopes and rare earth element concentrations of water bottle samples collected during MOSAiC


Seawater samples were collected from the MOSAiC Central Observatory, which consisted of sampling facilities positioned on the main sea-ice floe (including Ocean City) and on the RV Polarstern attached to it. A total of 41 large-volume (10L) seawater samples were collected during the 5 legs from October 2019 to September 2020 using a Conductivity-Temperature-Depth (CTD) rosette fitted with 24 (RV Polarstern samples) and 12 (Ocean City samples) Niskin bottles. At each station, samples were obtained from the surface (0 to 5 m) and depths of 50, 100, and 200 or 250 m. The samples were collected in acid-cleaned LDPE-cubitainers and transported to the clean room laboratory at GEOMAR. In the laboratory, filtration through 0.45 Merck Millipore® cellulose acetate filters was carried out using a peristaltic pump. After filtration, samples were acidified to pH ~2.2 with ultra-pure concentrated hydrochloric acid. Small aliquots (0.1 L) for δ18O analysis were obtained before filtration and acidification and stored in glass bottles at 4 °C until analysis. The neodymium isotopes are reported as 143Nd/144Nd and as εNd and were determined at GEOMAR using an multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS). Their internal and external reproducibility is given in the data table. Rare earth element concentrations are given in pmol/kg and were pre-concentrated offline using a SeaFAST system and determined using an inductively coupled plasma mass spectrometer (ICP-MS) at GEOMAR. Their external reproducibility is better than ~6% for La, Ce, Pr, Nd, Sm and Eu and better than ~5% for all other rare earth elements. Stable oxygen isotopes were determined at the Stable Isotope Laboratory of the College of Earth, Ocean, and Atmospheric Sciences at Oregon State University using the CO2-water isotope equilibration technique and are reported as the measured 18O/16O ratio normalized to Vienna Standard Mean Ocean Water (V-SMOV) in δ-notation, with an external reproducibility of ± 0.05 ‰ or better.

DOI https://doi.pangaea.de/10.1594/PANGAEA.966223
Related Identifier https://doi.pangaea.de/10.1594/PANGAEA.966184
Related Identifier https://doi.org/10.1594/PANGAEA.958464
Related Identifier https://doi.org/10.1594/PANGAEA.948291
Related Identifier https://doi.org/10.1594/PANGAEA.959966
Related Identifier https://doi.org/10.1594/PANGAEA.959965
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.966223
Creator Laukert, Georgi (ORCID: 0000-0002-8209-763X); Bauch, Dorothea ORCID logo; Damm, Ellen ORCID logo; Hathorne, Ed C ORCID logo; Simões Pereira, Patric; D'Angelo, Alessandra ORCID logo; Nomura, Daiki
Publisher PANGAEA
Contributor Tippenhauer, Sandra
Publication Year 2024
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
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints); https://creativecommons.org/licenses/by/4.0/
OpenAccess false
Resource Type Dataset
Format text/tab-separated-values
Size 1353 data points
Discipline Earth System Research
Spatial Coverage (-2.739W, 79.407S, 132.551E, 89.073N); Arctic Ocean
Temporal Coverage Begin 2019-10-04T08:25:44Z
Temporal Coverage End 2020-09-15T06:04:04Z