Physical oceanography measured on bottle water samples during ODEN expedition SO21 for the Synoptic Arctic Survey

Céline Heuzé, Salar Karam, Julia Muchowski, Alexandra Padilla, Christian Stranne, Lennart Gerke, Toste Tanhua, Adam Ulfsbo, Christien Laber, Colin A. Stedmon

Discrete bottle values of temperature, salinity, dissolved oxygen, chlorophyll A fluorescence and coloured dissolved organic matter (CDOM) collected in the Arctic Ocean, over the western Eurasian Basin and Lomonosov Ridge, between 2 August and 11 September 2021, from I/B Oden. This is the Swedish contribution to the international Synoptic Arctic Survey.

This dataset merges the bottle data from the full-depth physical CTD and the shallow biological CTD. Both systems had the standard SeaBird SBE911 plus system with dual sensors to measure in-situ temperature and conductivity and single sensors measuring pressure and oxygen. The physical CTD also had a CDOM sensor (Turner Cyclops fluorometer), while the Chl-A fluorometer (WET Labs, ECO-AFL/FL) was moved throughout the expedition between the two systems.

Citation

Céline Heuzé, Salar Karam, Julia Muchowski, Alexandra Padilla, Christian Stranne, Lennart Gerke, Toste Tanhua, Adam Ulfsbo, Christien Laber, Colin A Stedmon (2022) Physical Oceanography measured on bottle water samples during ODEN expedition SO21 for the Synoptic Arctic Survey. [Dataset]. PANGAEA. https://doi.org/10.1594/PANGAEA.951264

References

Snoeijs-Leijonmalm Pauline, the SAS-Oden Scientific Party (2022) Expedition Report SWEDARCTIC: Synoptic Arctic Survey 2021 with icebreaker Oden. Swedish Polar Research Secretariat, 300 pp, ISBN 978-91-519-3672-7

Data description

The dataset is provided as a tab-delimited text, downloadable from the dataset's web site at PANGAEA.

Comments

Salinity, Oxygen, Chl-A fluorescence and CDOM were calibrated against sample data collected and analysed by the co-authors:

• Salinity samples from the deep stations were analysed post-cruise using a salinometer (Guildline Autosal) and IAPSO standard seawater at the GEOMAR, Germany.
• Dissolved oxygen was determined onboard using an automatic Winkler titration setup with UV detection (Scripps Institute of Oceanography Oxygen Titration System version 2.35m).
• Chl-A concentration was determined post-cruise from flow cytometry (FCM) at Linnaeus University, Sweden. The samples consisted of 4 mL cryovials, of which 3.8 mL was sample water and 76 μL 25% EM grade glutaraldehyde solution (Glu stock). The samples incubated at room temperature for 5 minutes before flash freezing in liquid nitrogen and then placing in the -80 °C freezer in cryoboxes.
• CDOM was determined post-cruise at the National Institute of Aquatic Resources - DTU Aqua, Denmark, following the method of Lawaetz and Stedmon (2009).

This dataset contains the bottle data of the casts where bottles were fired. For more information about each sensor and their calibration, the reader is invited to check the cruise report.

More information about projects, funding, coverage, etc. are found on the dataset's web site at PANGAEA.