Passow, Uta; Peinert, Rolf (1993): Hydrochemistry measured on water bottle samples during METEOR cruise M10/1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.65476, Supplement to: Passow, U; Peinert, R (1993): The role of plankton in particle flux; two case studies from the northeast Atlantic. Deep Sea Research Part II: Topical Studies in Oceanography, 40(1-2), 573-585, https://doi.org/10.1016/0967-0645(93)90033-J
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Abstract:
The relationship between the vertical flux of microplankton and its standing stock in the upper ocean was determined in the subtropical (33°N, 21°W) and tropical (18°N, 30°W) northeast Atlantic in spring 1989 as part of the North Atlantic Bloom Experiment.
In the subtropical area specific sedimentation rates at all depths were low (0.1% of standing stock) and 10-20% of settled particulate organic carbon (POC) was viable diatoms. The high contribution of viable diatoms, their empty frustules and tintinnid loricae to settled material characterized a system in transition between a diatom bloom sedimentation event and an oligotrophic summer situation.
In the tropical area specific sedimentation rates were similar, but absolute rates (3 mg C m?2 day?1) were only about a third of those in the subtropical area. Microplankton carbon contributed only 2-6% to POC. Hard parts of heterotrophs found embedded in amorphous detrital matter suggest that particles had passed through a complex food web prior to sedimentation. Coccolithophorids, not diatoms dominated the autotrophic fraction in traps, and a shift in the composition of autotrophs may indicate a perturbation of the oligotrophic system.
Project(s):
Joint Global Ocean Flux Study (JGOFS)
Coverage:
Median Latitude: 25.692383 * Median Longitude: -25.809064 * South-bound Latitude: 18.335000 * West-bound Longitude: -30.605000 * North-bound Latitude: 33.923300 * East-bound Longitude: -20.960000
Date/Time Start: 1989-03-27T08:04:00 * Date/Time End: 1989-04-24T10:22:00
Minimum DEPTH, water: 10 m * Maximum DEPTH, water: 326 m
Event(s):
M10/1-RO6-241_003 * Latitude: 18.335000 * Longitude: -29.626700 * Date/Time Start: 1989-03-27T08:04:00 * Date/Time End: 1989-03-27T08:09:00 * Elevation: -4789.0 m * Campaign: M10/1 * Basis: Meteor (1986) * Method/Device: Bottle, Niskin 30-L (NIS_30L)
M10/1-RO6-241_004 * Latitude: 18.335000 * Longitude: -29.626700 * Date/Time Start: 1989-03-27T08:27:00 * Date/Time End: 1989-03-27T08:34:00 * Campaign: M10/1 * Basis: Meteor (1986) * Method/Device: Bottle, Niskin 30-L (NIS_30L)
M10/1-RO6-245_006 * Latitude: 18.391700 * Longitude: -29.685000 * Date/Time Start: 1989-03-28T07:47:00 * Date/Time End: 1989-03-28T08:06:00 * Campaign: M10/1 * Basis: Meteor (1986) * Method/Device: Bottle, Niskin 30-L (NIS_30L)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Date/Time of event | Date/Time | ||||
| 3 | Latitude of event | Latitude | ||||
| 4 | Longitude of event | Longitude | ||||
| 5 | Elevation of event | Elevation | m | |||
| 6 | DEPTH, water | Depth water | m | Geocode | ||
| 7 | Ammonium | [NH4]+ | µmol/l | Passow, Uta | Colorometric analysis, manual | |
| 8 | Nitrate and Nitrite | [NO3]- + [NO2]- | µmol/l | Passow, Uta | Continuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1) | |
| 9 | Nitrite | [NO2]- | µmol/l | Passow, Uta | Continuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1) | |
| 10 | Phosphate | [PO4]3- | µmol/l | Passow, Uta | Continuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1) | |
| 11 | Silicate | Si(OH)4 | µmol/l | Passow, Uta | Continuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1) | |
| 12 | Carbon, organic, particulate | POC | µg/l | Passow, Uta | Carbon/nitrogen analyser (GF/F filtered) | |
| 13 | Nitrogen, organic, particulate | PON | µg/l | Passow, Uta | Carbon/nitrogen analyser (GF/F filtered) | |
| 14 | Silicon, particulate | Si part | µmol/l | Passow, Uta | Oxidation (alkaline) with borate buffered potassium persulphate | |
| 15 | Chlorophyll a | Chl a | µg/l | Passow, Uta | Chlorophyll a, fluorometric determination (Grasshoff et al., 1983, Chemie GmbH) | |
| 16 | Phosphorus, particulate | PP | µmol/l | Passow, Uta | Oxidation; then autoanalysis (GF/F filtered) | |
| 17 | Suspended matter, total | TSS | mg/l | Passow, Uta | Gravimetric analysis (GF/F filtered) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1700 data points