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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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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):
North Atlantic Bloom Experiment, 1989-1991 (NABE)
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) * 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) * 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) * Device: Bottle, Niskin 30-L (NIS_30L)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Date/Time of eventDate/Time
3Latitude of eventLatitude
4Longitude of eventLongitude
5Elevation of eventElevationm
6DEPTH, waterDepth watermGeocode
7Ammonium[NH4]+µmol/lPassow, UtaColorometric analysis, manual
8Nitrate and Nitrite[NO3]- + [NO2]-µmol/lPassow, UtaContinuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1)
9Nitrite[NO2]-µmol/lPassow, UtaContinuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1)
10Phosphate[PO4]3-µmol/lPassow, UtaContinuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1)
11SilicateSi(OH)4µmol/lPassow, UtaContinuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1)
12Carbon, organic, particulatePOCµg/lPassow, UtaCarbon/nitrogen analyser (GF/F filtered)
13Nitrogen, organic, particulatePONµg/lPassow, UtaCarbon/nitrogen analyser (GF/F filtered)
14Silicon, particulateSi partµmol/lPassow, UtaOxidation (alkaline) with borate buffered potassium persulphate
15Chlorophyll aChl aµg/lPassow, UtaChlorophyll a, fluorometric determination (Grasshoff et al., 1983, Chemie GmbH)
16Phosphorus, particulatePPµmol/lPassow, UtaOxidation; then autoanalysis (GF/F filtered)
17Suspended matter, totalTSSmg/lPassow, UtaGravimetric analysis (GF/F filtered)
Size:
1700 data points

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