Passow, Uta; Peinert, Rolf (1993): Hydrochemistry measured on water bottle samples during METEOR cruise M10/1. 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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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.
Joint Global Ocean Flux Study (JGOFS)
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
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)
|#||Name||Short Name||Unit||Principal Investigator||Method/Device||Comment|
|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)|
1700 data points