Vedernikov, Vladimir I; Gagarin, Vladimir I; Demidov, A B; Burenkov, Vladimir I; Stunzhas, Pavel A (2007): (Table 2) Production characteristics of phytoplankton and selected related factors at bottle sampling stations in the subtropical and tropical Atlantic Ocean [dataset]. P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, PANGAEA, https://doi.org/10.1594/PANGAEA.726852, Supplement to: Vedernikov, VI et al. (2007): Primary production and chlorophyll distributions in the subtropical and tropical waters of the Atlantic Ocean in the autumn of 2002. Oceanology, 47(3), 386-399, https://doi.org/10.1134/S0001437007030113
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Abstract:
In October and November 2002, high and relatively high values of chlorophyll a concentration at the sea surface (Cchl) were observed in the English Channel (0.47 mg/m**3), in waters of the North Atlantic Current (0.25 mg/m**3 ), in the tropical and subtropical anticyclonic gyres (0.07-0.42 mg/m**3), and also in the southwestern region of the southern subtropical anticyclonic gyre (usually 0.11-0.23 mg/m**3). The central regions of the southern subtropical anticyclonic gyre (SATG) and the North Atlantic tropical gyre (NATR) were characterized by lower values of Cchl (0.02-0.08 mg/m**3 for the SATG and 0.07-0.14 mg/m**3 for the NATR). At most of the SATG stations, values of surface primary production (Cphs) varied from 2.5 to 5.5 mg C/m**3 per day and were mainly defined by fluctuations of Cchl (r = +0.78) rather than by those of the assimilation number (r = +0.54). Low assimilation activity of phytoplankton in these waters (1.3-4.6 mg chl a per hour) pointed to a lack of nutrients. Analysis of variability of their concentration and composition of photosynthetic pigments showed that, in waters north of 30°N, the growth of phytoplankton was mostly restricted by deficiency of nitrogen, while, in more southern areas, at the majority of stations (about 60%), phosphorus concentrations were minimal. At low concentrations of nitrates and nitrites, ammonium represented itself as a buffer that prevented planktonic algae from extreme degrees of nitric starvation. In tropical waters and in waters of the SATG, primary production throughout the water column varied from 240 to 380 mg C/m**2 30° per day. This level of productivity at stations with low values of C chl (<0.08 mg/m**3) was provided by a well-developed deep chlorophyll maximum and high transparency of water. Light curves of photosynthesis based on in situ measurements point to high efficiency of utilizing penetrating solar radiation by phytoplankton on cloudy days.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: -14.257222 * Median Longitude: -25.937500 * South-bound Latitude: -32.858333 * West-bound Longitude: -39.285000 * North-bound Latitude: 24.500000 * East-bound Longitude: -20.000000
Date/Time Start: 2002-10-22T00:00:00 * Date/Time End: 2002-11-08T00:00:00
Event(s):
Ioffe-11-1048 * Latitude: 24.500000 * Longitude: -20.000000 * Date/Time: 2002-10-22T00:00:00 * Location: Atlantic Ocean * Campaign: Ioffe-11 * Basis: Akademik Ioffe * Method/Device: Bio-Rosette (BRO)
Ioffe-11-1049 * Latitude: 5.233333 * Longitude: -20.000000 * Date/Time: 2002-10-26T00:00:00 * Location: Atlantic Ocean * Campaign: Ioffe-11 * Basis: Akademik Ioffe * Method/Device: Bio-Rosette (BRO)
Ioffe-11-1050 * Latitude: -19.268333 * Longitude: -20.000000 * Date/Time: 2002-10-31T00:00:00 * Location: Atlantic Ocean * Campaign: Ioffe-11 * Basis: Akademik Ioffe * Method/Device: Bio-Rosette (BRO)
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 | Area/locality | Area | Vedernikov, Vladimir I | |||
5 | Sample code/label | Sample label | Vedernikov, Vladimir I | |||
6 | Primary production of carbon | PP C | mg/m3/day | Vedernikov, Vladimir I | ||
7 | Primary production, integrated | PP C | mg/m2/day | Vedernikov, Vladimir I | ||
8 | Chlorophyll a | Chl a | µg/l | Vedernikov, Vladimir I | Spectrophotometry | concentration in the surface layer |
9 | Chlorophyll a | Chl a | µg/l | Vedernikov, Vladimir I | Spectrophotometry | maximum concentration in the water column |
10 | Chlorophyll a | Chl a | µg/l | Vedernikov, Vladimir I | Calculated | mean concentrations in the layer of photosynthesis |
11 | Chlorophyll a | Chl a | µg/l | Vedernikov, Vladimir I | Calculated | mean concentrations in the water column (0-200 m) |
12 | Fixation of carbon in chlorophyll | C/Chl fix | mg/mg/h | Vedernikov, Vladimir I | Radiotracer | in the surface layer |
13 | Fixation of carbon in chlorophyll | C/Chl fix | mg/mg/h | Vedernikov, Vladimir I | Radiotracer | maximal value |
14 | Fixation of carbon in chlorophyll | C/Chl fix | mg/mg/h | Vedernikov, Vladimir I | Calculated | averaged over the layer of photosynthesis |
15 | Efficiency of utilization | Q | % | Vedernikov, Vladimir I | Calculated | of solar radiation in the process of photosynthesis |
16 | Productivity index | Psi | g C/(g Chl a)/E | Vedernikov, Vladimir I | Calculated | |
17 | Layer thickness | Thickness | m | Vedernikov, Vladimir I | of the layer of photosynthesis | |
18 | Penetration depth | Penetr depth | m | Vedernikov, Vladimir I | Calculated | for 1% of surface solar irradiance |
19 | Penetration depth | Penetr depth | m | Vedernikov, Vladimir I | Calculated | for 0.1% of surface solar irradiance |
20 | Radiation, photosynthetically active over a period of a sample exposure | E | kJ/m2 | Vedernikov, Vladimir I | Photometry | |
21 | Temperature, water | Temp | °C | Vedernikov, Vladimir I | ||
22 | Phosphate | [PO4]3- | µmol/l | Vedernikov, Vladimir I | Colorimetry | |
23 | Nitrate | [NO3]- | µmol/l | Vedernikov, Vladimir I | Colorimetry | |
24 | Nitrite | [NO2]- | µmol/l | Vedernikov, Vladimir I | Colorimetry | |
25 | Ammonium | [NH4]+ | µmol/l | Vedernikov, Vladimir I | Colorimetry | |
26 | Silicon | Si | µmol/l | Vedernikov, Vladimir I | Colorimetry | |
27 | Silicon/Nitrogen, molar ratio | Si/N | Vedernikov, Vladimir I | Calculated | ||
28 | Silicon/Phosphorus ratio | Si/P | Vedernikov, Vladimir I | Calculated | ||
29 | Nitrogen/Phosphorus ratio | N/P | Vedernikov, Vladimir I | Calculated | molar ratio | |
30 | Ratio | Ratio | Vedernikov, Vladimir I | Calculated | NH4/(NO3+NO2+NH4) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
157 data points
Data
1 Event | 2 Latitude | 3 Longitude | 4 Area | 5 Sample label | 6 PP C [mg/m3/day] | 7 PP C [mg/m2/day] | 8 Chl a [µg/l] (concentration in the surface ...) | 9 Chl a [µg/l] (maximum concentration in the ...) | 10 Chl a [µg/l] (mean concentrations in the la...) | 11 Chl a [µg/l] (mean concentrations in the wa...) | 12 C/Chl fix [mg/mg/h] (in the surface layer, Radiotr...) | 13 C/Chl fix [mg/mg/h] (maximal value, Radiotracer) | 14 C/Chl fix [mg/mg/h] (averaged over the layer of ph...) | 15 Q [%] (of solar radiation in the pro...) | 16 Psi [g C/(g Chl a)/E] (Calculated) | 17 Thickness [m] (of the layer of photosynthesis) | 18 Penetr depth [m] (for 1% of surface solar irrad...) | 19 Penetr depth [m] (for 0.1% of surface solar irr...) | 20 E [kJ/m2] (Photometry) | 21 Temp [°C] | 22 [PO4]3- [µmol/l] (Colorimetry) | 23 [NO3]- [µmol/l] (Colorimetry) | 24 [NO2]- [µmol/l] (Colorimetry) | 25 [NH4]+ [µmol/l] (Colorimetry) | 26 Si [µmol/l] (Colorimetry) | 27 Si/N (Calculated) | 28 Si/P (Calculated) | 29 N/P (molar ratio, Calculated) | 30 Ratio (NH4/(NO3+NO2+NH4), Calculated) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ioffe-11-1048 | 24.5000 | -20.0000 | North Atlantic Tropical Gyre province | N8 | 2.68 | 297 | 0.071 | 0.2800 | 0.158 | 0.158 | 3.35 | 3.81 | 0.83 | 0.187 | 0.36 | 200 | 128 | 204 | 3432 | 24.5 | 0.01 | 0.02 | 0.01 | 0.86 | 4.35 | 4.90 | 329.0 | 67.00 | 0.96 |
Ioffe-11-1049 | 5.2333 | -20.0000 | Western Tropical Atlantic province | N12 | 12.66 | 376 | 0.166 | 0.2470 | 0.154 | 0.114 | 6.37 | 6.71 | 1.51 | 0.294 | 0.85 | 135 | 79 | 150 | 2761 | 28.3 | 0.57 | 8.88 | 0.05 | 0.78 | 6.57 | 0.67 | 11.5 | 17.10 | 0.08 |
Ioffe-11-1050 | -19.2683 | -20.0000 | South Atlantic Subtropical Gyre province | N17 | 1.47 | 285 | 0.035 | 0.2270 | 0.108 | 0.109 | 3.31 | 4.41 | 0.89 | 0.092 | 0.22 | 230 | 135 | 212 | 6626 | 22.9 | 0.05 | 0.01 | 0.04 | 0.42 | 4.29 | 9.21 | 82.5 | 8.96 | 0.90 |
Ioffe-11-1051 | -32.8583 | -25.3083 | South Atlantic Subtropical Gyre province | N20 | 3.00 | 241 | 0.078 | 0.3115 | 0.183 | 0.151 | 2.80 | 2.88 | 0.73 | 0.420 | 1.02 | 135 | 102 | 164 | 1239 | 16.9 | 0.02 | 0.17 | 0.07 | 0.44 | 2.68 | 3.96 | 138.0 | 34.70 | 0.66 |
Ioffe-11-1057 | -31.9200 | -31.0317 | South Atlantic Subtropical Gyre province | N23 | 4.33 | 373 | 0.141 | 0.3890 | 0.226 | 0.205 | 2.23 | 2.51 | 0.70 | 0.199 | 0.30 | 175 | 99 | 161 | 4047 | 19.2 | 0.08 | 0.17 | 0.04 | 0.12 | 3.66 | 11.00 | 46.5 | 4.23 | 0.36 |
Ioffe-11-1059 | -31.2300 | -39.2850 | South Atlantic Subtropical Gyre province | N25 | 2.48 | 253 | 0.142 | 0.3870 | 0.233 | 0.222 | 1.30 | 1.62 | 0.46 | 0.105 | 0.16 | 175 | 100 | 162 | 5133 | 19.5 | 0.12 | 0.03 | 0.28 | 0.66 |