Stinchcombe, Mark Colin; Davey, Emily (2014): Nutrients and oxygen concentrations measured in water samples from the North Atlantic during the James Cook cruise JC087 in March 2013 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.832864
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Abstract:
Analysis for micro-molar concentrations of nitrate and nitrite, nitrite, phosphate, silicate and ammonia was undertaken on a SEAL Analytical UK Ltd, AA3 segmented flow autoanalyser following methods described by Kirkwood (1996). Samples were drawn from Niskin bottles on the CTD into 15ml polycarbonate centrifuge tubes and kept refrigerated at approximately 4oC until analysis, which generally commenced within 30 minutes. Overall 23 runs with 597 samples were analysed. This is a total of 502 CTD samples, 69 underway samples and 26 from other sources.
An artificial seawater matrix (ASW) of 40g/litre sodium chloride was used as the inter-sample wash and standard matrix. The nutrient free status of this solution was checked by running Ocean Scientific International (OSI) low nutrient seawater (LNS) on every run. A single set of mixed standards were made up by diluting 5mM solutions made from weighed dried salts in 1litre of ASW into plastic 250ml volumetric flasks that had been cleaned by washing in MilliQ water (MQ). Data processing was undertaken using SEAL Analytical UK Ltd proprietary software (AACE 6.07) and was performed within a few hours of the run being finished. The sample time was 60 seconds and the wash time was 30 seconds. The lines were washed daily with wash solutions specific for each chemistry, but comprised of MQ, MQ and SDS, MQ and Triton-X, or MQ and Brij-35. Three times during the cruise the phosphate and silicate channels were washed with a weak sodium hypochlorite solution.
Project(s):
Basin Scale Analysis, Synthesis and Integration (EURO-BASIN)
Funding:
Seventh Framework Programme (FP7), grant/award no. 264933: Basin Scale Analysis, Synthesis and Integration
Coverage:
Median Latitude: 48.646408 * Median Longitude: -16.165000 * South-bound Latitude: 48.508667 * West-bound Longitude: -16.529000 * North-bound Latitude: 48.699833 * East-bound Longitude: -16.033667
Date/Time Start: 2013-06-03T12:31:00 * Date/Time End: 2013-06-14T11:43:00
Minimum DEPTH, water: 2 m * Maximum DEPTH, water: 4800 m
Event(s):
JC087-005 (JC087-001) * Latitude Start: 48.699833 * Longitude Start: -16.033667 * Latitude End: 48.699667 * Longitude End: -16.143333 * Date/Time: 2013-06-03T12:31:00 * Location: Porcupine Abyssal Plain * Campaign: JC087 * Basis: James Cook * Method/Device: CTD/Rosette (CTD-RO) * Comment: maximum depth = 4787m, CTD at bottom 14:12
JC087-007 (JC087-002) * Latitude Start: 48.648667 * Longitude Start: -16.142667 * Latitude End: 48.648667 * Longitude End: -16.142667 * Date/Time: 2013-06-03T20:38:00 * Location: Porcupine Abyssal Plain * Campaign: JC087 * Basis: James Cook * Method/Device: CTD/Rosette (CTD-RO) * Comment: maximum depth = 200m
JC087-031 (JC087-003) * Latitude Start: 48.648667 * Longitude Start: -16.143000 * Latitude End: 48.648500 * Longitude End: -16.142833 * Date/Time: 2013-06-05T04:10:00 * Location: Porcupine Abyssal Plain * Campaign: JC087 * Basis: James Cook * Method/Device: CTD/Rosette (CTD-RO) * Comment: maximum depth = 200m
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Date/Time of event | Date/Time | ||||
| 5 | Bottle number | Bottle | Stinchcombe, Mark Colin | of Niskin bottle | ||
| 6 | DEPTH, water | Depth water | m | Geocode | ||
| 7 | Silicate | Si(OH)4 | µmol/l | Stinchcombe, Mark Colin | Nutrient analyser | |
| 8 | Phosphate | [PO4]3- | µmol/l | Stinchcombe, Mark Colin | Nutrient analyser | |
| 9 | Nitrate and Nitrite | [NO3]- + [NO2]- | µmol/l | Stinchcombe, Mark Colin | Nutrient analyser | |
| 10 | Nitrite | [NO2]- | µmol/l | Stinchcombe, Mark Colin | Nutrient analyser | |
| 11 | Ammonium | [NH4]+ | µmol/l | Stinchcombe, Mark Colin | Nutrient analyser | |
| 12 | Oxygen | O2 | µmol/l | Stinchcombe, Mark Colin | Dissolved oxygen with modified Winkler (Carpenter, 1965) | dissolved oxygen, replicate 1 |
| 13 | Oxygen | O2 | µmol/l | Stinchcombe, Mark Colin | Dissolved oxygen with modified Winkler (Carpenter, 1965) | dissolved oxygen, replicate 2 |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3390 data points
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