Abstract:
During the JR19002 Icebergs 3 cruise, samples from the surface seawater were collected from Zodiacs. Samples were collected with the motivation of determining the impact of retreating glaciers upon the surface ocean, such as the hydrography and biogeochemical composition of the surface ocean. Three main sites were visited during JR19002 from south to north: Marian Cove, Maxwell Bay, King George Island; Borgen Bay, Anvers Island; and Sheldon Cove, Ryder Bay, Adelaide Island. Small boat traversed each bay, collecting particulate and dissolved seawater samples. Parameters collected and determined include: stable oxygen isotopes, salinity, dissolved macronutrients, dissolved and particulate metals, radium and thorium activity.
Funding:
NERC grants, NE/P017630/1 (Dr Amber Annett) and NE/P003060/1 (Professor David Barnes).
Keywords:
glacier retreat, iron cycling, meltwater, nutrients, oxygen isotopes, polar biogeochemistry, radium, surface ocean biogeochemistry
Jones, R.L., Annett, A.L., Sherrell, R., Flanagan, O., Woodward, M., Meredith, M., Scourse, J.D., & Lohan, M. (2025). Surface seawater concentration data collected from the West Antarctic Peninsula during the Icebergs 3 JR19002 cruise in January 2020 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/deaec6fa-9654-426d-ba67-756776b25cd7
| Access Constraints: | No constraints apply. |
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| Use Constraints: | Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2025-01-22 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK Polar Data Centre |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Rhiannon L Jones |
| Role(s) | Investigator, Technical Contact |
| Organisation | British Antarctic Survey |
| Name | Dr Amber L Annett |
| Role(s) | Investigator |
| Organisation | University of Southampton |
| Name | Oliver Flanagan |
| Role(s) | Investigator |
| Organisation | University of Southampton |
| Name | Prof James Scourse |
| Role(s) | Investigator |
| Organisation | Exeter University |
| Name | Prof Robert Sherrell |
| Role(s) | Investigator |
| Organisation | Rutgers University |
| Name | Dr Malcolm Woodward |
| Role(s) | Investigator |
| Organisation | Plymouth Marine Laboratory |
| Name | Prof Michael P Meredith |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Prof Maeve Lohan |
| Role(s) | Investigator |
| Organisation | University of Southampton |
| Parent Dataset: | N/A |
| Lineage: | Surface seawater for particulate and dissolved metals, radium, dissolved micronutrients, salinity, and stable oxygen isotopes were collected by hand using zodiac boats during the JR19002 Icebergs 3 cruise (Supplementary Table S5). Acid-cleaned bottles were rinsed and filled with surface seawater over the bow to avoid contamination from the Zodiac. Bottles were immediately capped and returned to the ship and processed. For total particulate digest, 4 L of seawater was pressure filtered onto 25mm Supor (PES) filters (0.45 µm pore size) and frozen immediately. filters were frozen immediately at -20 degrees C. Dissolved phase samples were filtered using a 0.2 micrometers Acropak cartridge filter and peristaltic pump and collected into acid-washed 125mL HDPE bottles (dissolved metals). All sampling and handling was performed according to GEOTRACES protocols. Three PES filters per site were subject to complete acid digestion using 10 percent HF/50 percent HNO3 (UpA, distilled) at 135 degrees C for 4 h following GEOTRACES protocol. Elemental composition was quantified by sector-field ICP-MS (Finnigan MAT Element 1) analysis. Nine multi-element external standard dilutions were created gravimetrically from a stock calibration standard to calibrate the range of sample concentrations. Samples were corrected for blank signals using blanks for acids, PTFE vials, and filters. Indium (1 ppb) was used as internal standard to correct for drift and matrix effects. Concentrations for dissolved metals were determined using SeaFAST preconcentration followed by ICP-MS analysis. Iron was quantified using isotope dilution, while Mn used external matrix-matched standards. Analytical replicates were run around every sixth sample and were typically 1-3 percent deviation about the mean. Precision, from repeat measurements of an in-house seawater standard was typically 3 percent or better, and accuracy was assessed by repeat measurements of consensus standards SAFe S and SAFe D2. Salinity measurements from Zodiac boat surface samples were analysed on a Guildline 8400B salinometer. Salinity is here presented on the Practical Salinity scale. Samples for stable oxygen isotopes were stored in 50 ml glass vials sealed with stoppers and crimps. Oxygen isotope samples were analysed around 9 months later at the UK's National Environmental Isotope Facility at the British Geological Survey, using the CO2 equilibration method with an Isoprime 100 mass spectrometer plus Aquaprep device. Isotope measurements were calibrated against internal and international standards including VSMOW2 and VSLAP2. Based on duplicate analysis, analytical reproducibility was less than 0.05 percent for all samples. |
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| Temporal Coverage: | |
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| Start Date | 2020-01-01 |
| End Date | 2020-01-18 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -67.52 |
| Northernmost | -62.2 |
| Longitude | |
| Westernmost | -68.28 |
| Easternmost | -58.72 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | 0 |
| Max Depth | 10 |
| Location: | |
| Location | Antarctica |
| Detailed Location | West Antarctic Peninsula |
| Location | Antarctica |
| Detailed Location | Marian Cove, Maxwell Bay, King George Island (-62.21, -58.76) |
| Location | Antarctica |
| Detailed Location | Börgen Bay, Anvers Island (-64.74, -63.46) |
| Location | Antarctica |
| Detailed Location | Sheldon Cove, Ryder Bay, Adelaide Island (-67.53, -68.26) |
| Data Storage: | 1 xcsv file with biogeochemistry data (concentration per L seawater, isotopic signature, or radiogenic activity). |
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