Vedernikov, Vladimir I; Gagarin, Vladimir I (2003): (Table 2) Production parameters of phytoplankton and some associated parameters in the area of the Titanic Polygon [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.763231, Supplement to: Vedernikov, VI; Gagarin, VI (2003): Primary production and chlorophyll in the frontal zone of the Gulf Stream and Labrador Current in July-September 2001. Translated from Okeanologiya, 2003, 43(2), 209-218, Oceanology, 43(2), 196-205
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Abstract:
Studies were carried out mostly in the area of RMS Titanic wreck site (41°44'N, 49°57'W) located above the continental slope and the south of the Grand Banks of Newfoundland. In a period from 18.06 to 24.09.2001 five surveys of production characteristics of surface phytoplankton were conducted over 5-9 days. Mean values of these characteristics obtained during the surveys were 9.2-11.7 mg C/m**3 per day for primary production (C_phs), 0.102-0.188 mg/m**3 for chlorophyll a (C_chls), and 4.44-7.42 mg C/mg chl. a per hour for assimilation number (AN). The main reason for low C_phs variability was a significant inverse relationship (R=-0.66) between AN and C_chls found over the research area. When cold shelf waters dominated in the area (27.07 to 19.08.2001), C_chls values for the slope region (0.125+/-0.031 µg/l) and for the outer shelf (0.130+/-0.040 µg/l) were similar. During strengthening of influence of warmer slope waters within area (from 29.08 to 13.09.2001), C_chls concentration within surface waters of the outer shelf was 0.152+/-0.039 µg/l and exceeded one for the slope region (0.094+/-0.004 µg/l) by factor 1.6. Against the background of low Cchls values, the High values of integral primary production in the water column (510-1010 mg C/m**2 per day) at low C_chls values measured within the area were determined both by high assimilation activity of phytoplankton and by the deep (30-40 m) maximum of primary production. Main reasons for formation of such a maximum were high chlorophyll concentration within the layer of the deep chlorophyll maximum (up to 0.5-2.5 µg/l) and in the relatively high solar irradiance within this layer varying from 1.4 to 8.6% of subsurface PAR.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 41.715000 * Median Longitude: -49.922083 * South-bound Latitude: 41.695000 * West-bound Longitude: -49.963333 * North-bound Latitude: 41.740000 * East-bound Longitude: -49.858333
Date/Time Start: 2001-07-21T00:00:00 * Date/Time End: 2001-09-24T00:00:00
Minimum Elevation: -3792.0 m * Maximum Elevation: -3678.0 m
Event(s):
AMK46-4190 * Latitude: 41.740000 * Longitude: -49.956667 * Date/Time: 2001-07-21T00:00:00 * Elevation: -3776.0 m * Location: Northwest Atlantic * Campaign: AMK46 * Basis: Akademik Mstislav Keldysh * Method/Device: Bottle, Niskin 30-L (NIS_30L)
AMK46-4244 * Latitude: 41.730000 * Longitude: -49.963333 * Date/Time: 2001-08-27T00:00:00 * Elevation: -3792.0 m * Location: Northwest Atlantic * Campaign: AMK46 * Basis: Akademik Mstislav Keldysh * Method/Device: Bottle, Niskin 30-L (NIS_30L)
AMK46-4258 * Latitude: 41.695000 * Longitude: -49.910000 * Date/Time: 2001-09-08T00:00:00 * Elevation: -3790.0 m * Location: Northwest Atlantic * Campaign: AMK46 * Basis: Akademik Mstislav Keldysh * Method/Device: Bottle, Niskin 30-L (NIS_30L)
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 | Elevation of event | Elevation | m | |||
| 5 | Date/Time of event | Date/Time | ||||
| 6 | Primary production of carbon | PP C | mg/m3/day | Vedernikov, Vladimir I | 14C in-situ incubation | in the surface layer |
| 7 | Primary production, integrated | PP C | mg/m2/day | Vedernikov, Vladimir I | Calculated | |
| 8 | Chlorophyll a | Chl a | µg/l | Vedernikov, Vladimir I | Photometry | in the surface layer |
| 9 | Chlorophyll a | Chl a | µg/l | Vedernikov, Vladimir I | Photometry | in the photosynthetic layer, aver. |
| 10 | Chlorophyll a | Chl a | µg/l | Vedernikov, Vladimir I | Photometry | in the water column, aver. |
| 11 | Assimilation rate of carbon per chlorophyll a | Assim r C/Chl a | mg/mg/h | Vedernikov, Vladimir I | Calculated | maximum in the water column |
| 12 | Assimilation rate of carbon per chlorophyll a | Assim r C/Chl a | mg/mg/h | Vedernikov, Vladimir I | Calculated | in the photosynthetic layer, aver. |
| 13 | Productivity index | Psi | g C/(g Chl a)/E | Vedernikov, Vladimir I | Calculated | |
| 14 | Photosynthesis layer, thickness | TPhl | m | Vedernikov, Vladimir I | ||
| 15 | Depth of Secchi Disk | z(SD) | m | Vedernikov, Vladimir I | Secchi disc | |
| 16 | Radiation, photosynthetically active over a period of a sample exposure | E | kJ/m2 | Vedernikov, Vladimir I | ||
| 17 | Temperature, water | Temp | °C | Vedernikov, Vladimir I | CTD, Neil Brown | in the surface layer |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
48 data points