Debyser, Margot; Pichevin, Laetitia; Ganeshram, Raja S; Semiletov, Igor P (2024): Stable dissolved silicon isotopes measured on CTD and underway samples during AMK73 in the Laptev Sea [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.965315
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Abstract:
Dissolved stable silicon isotopes were determined in seawater samples collected during the 73rd expedition onboard RV Akademik Mstislav Keldysh (AMK73) in the Laptev Sea in October 2018 under ice free conditions. Seawater samples were filtered inline from Niskin bottles or the ship's underway system, acidified to 0.1% v/v with HCl and kept at 4°C until analysis on land. Samples were measured for δ29Si(OH)4 with reference to international reference material NBS28 on a Nu Plasma II MC-ICP-MS (The University of Edinburgh, School of Geosciences) using the MAGIC co-precipitation method and purified through column chemistry. International standards BigBatch, ALOHA300 and ALOHA1000 were run alongside seawater samples for inter-comparability. Final values were converted to δ30Si(OH)4 using the conversion factor of 1.96 for comparability. Reproducibility is 0.05 and 0.1‰ for δ29Si(OH)4 and δ30Si(OH)4 respectively. This dataset includes salinity, silicic acid concentrations and stable silicon isotope signatures of seawater, which provides useful information on the silicon biogeochemical cycle of the Laptev Sea, as influenced by the Lena river.
Keyword(s):
Supplement to:
Debyser, Margot; Pichevin, Laetitia; Ganeshram, Raja S; Semiletov, Igor P (in review): The importance of riverine nutrient supply for the marine silica pump of Arctic shelves: Evidence from the Laptev Sea. Global Biogeochemical Cycles
Funding:
Natural Environment Research Council (NERC), grant/award no. NE/L002558/1: NERC Doctoral Training Partnership (NERC DTP)
Natural Environment Research Council (NERC), grant/award no. NE/P006310/1: ARISE Changing Arctic Ocean
The Ministry of Education and Science of the Russian Federation (Minobrnauki of Russia), grant/award no. 021-2021-0010: Akademik Mstislav Keldysh
The Ministry of Education and Science of the Russian Federation (Minobrnauki of Russia), grant/award no. Priority-2030: Additional fieldwork support
Coverage:
Median Latitude: 74.859495 * Median Longitude: 114.391362 * South-bound Latitude: 72.494000 * West-bound Longitude: 69.504433 * North-bound Latitude: 77.806783 * East-bound Longitude: 130.501000
Minimum DEPTH, water: 0.0 m * Maximum DEPTH, water: 246.0 m
Event(s):
AMK73_6005 * Latitude: 72.494000 * Longitude: 130.495000 * Location: Laptev Sea * Campaign: AMK73 * Basis: Akademik Mstislav Keldysh * Method/Device: Bottle, Niskin (NIS)
AMK73_6006 * Latitude: 72.707000 * Longitude: 130.501000 * Location: Laptev Sea * Campaign: AMK73 * Basis: Akademik Mstislav Keldysh * Method/Device: Bottle, Niskin (NIS)
AMK73_6007 * Latitude: 73.123000 * Longitude: 130.500000 * Location: Laptev Sea * Campaign: AMK73 * Basis: Akademik Mstislav Keldysh * Method/Device: Bottle, Niskin (NIS)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Debyser, Margot | |||
| 2 | Latitude of event | Latitude | Debyser, Margot | |||
| 3 | Longitude of event | Longitude | Debyser, Margot | |||
| 4 | DEPTH, water | Depth water | m | Debyser, Margot | Geocode | |
| 5 | Salinity | Sal | Debyser, Margot | PSU | ||
| 6 | Silicate | Si(OH)4 | µmol/l | Debyser, Margot | ||
| 7 | δ29Si, silicic acid | δ29Si Si(OH)4 | ‰ | Debyser, Margot | Multi-collector ICP-MS (MC-ICP-MS), Nu Plasma II | |
| 8 | δ29Si, silicic acid, standard deviation | δ29Si Si(OH)4 std dev | ± | Debyser, Margot | ||
| 9 | δ30Si, silicic acid | δ30Si Si(OH)4 | ‰ | Debyser, Margot | Computed/Converted | |
| 10 | δ30Si, silicic acid, standard deviation | δ30Si Si(OH)4 std dev | ± | Debyser, Margot |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
394 data points