Riebesell, Ulf (2009): Photosynthetically active radiation during POLARSTERN cruise ANT-XVIII/2 [dataset]. IFM-GEOMAR Leibniz-Institute of Marine Sciences, Kiel University, PANGAEA, https://doi.org/10.1594/PANGAEA.727593
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Project(s):
Coverage:
Median Latitude: -48.127615 * Median Longitude: 20.916213 * South-bound Latitude: -48.600167 * West-bound Longitude: 20.006667 * North-bound Latitude: -47.669000 * East-bound Longitude: 21.264333
Date/Time Start: 2000-11-06T23:25:00 * Date/Time End: 2000-11-29T16:52:00
Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 0 m
Event(s):
PS58/009-2 (CTD9) * Latitude: -47.821000 * Longitude: 20.750000 * Date/Time: 2000-11-06T23:25:00 * Elevation: -4852.0 m * Location: South Atlantic * Campaign: ANT-XVIII/2 (PS58 EISENEX) * Basis: Polarstern * Method/Device: CTD/Rosette (CTD-RO) * Comment: max gear depth: 269 m; day: T-2
PS58/011-3 * Latitude: -47.878000 * Longitude: 20.948667 * Date/Time: 2000-11-08T20:55:00 * Elevation: -4498.0 m * Location: South Atlantic * Campaign: ANT-XVIII/2 (PS58 EISENEX) * Basis: Polarstern * Method/Device: CTD/Rosette (CTD-RO) * Comment: max gear depth: 502 m; in patch 1; in/out patch: In; day: T0
PS58/012-5 (CTD16) * Latitude: -48.104833 * Longitude: 20.862333 * Date/Time: 2000-11-09T13:01:00 * Elevation: -4570.0 m * Location: South Atlantic * Campaign: ANT-XVIII/2 (PS58 EISENEX) * Basis: Polarstern * Method/Device: CTD/Rosette (CTD-RO) * Comment: max gear depth: 500 m; out patch 1; in/out patch: Out; day: T1
Comment:
The following data are based on PAR measurements made with the Biospherical Instruments QCD-900L Quantum Cosine Deep Profiling Sensor of Santiago Gonzalez. The sensor was fixed to the frame of the bottle sampler from cast 9 onwards. 1 meter mean values of the downcasts were made available by Volker Strass. All calculations leading to the data below were made by Frank Gervais. Missing casts were made during the night or did not give reliable results.
The vertical attenuation coefficient (kd) of photosynthetically active radiation (PAR) was calculated as the slope of an ln-plot of PAR versus depth for the water layer between 10 and 40 m. (Calculations were also done for deeper water layers.) From the resulting regression parameters the subsurface PAR (PAR 0m) was calculated. The depth of the euphotic zone (Zeu) is the depth were PAR was 1 % of subsurface PAR.
Below the table with all CTD casts there is a table comprising only the data for the Bio-stations (which might be most interesting for most of you). These data were used for the analysis of primary production. As some of the Bio-casts were sampled in darkness, I extrapolated light conditions for these stations from neighbouring casts.
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 | DEPTH, water | Depth water | m | Geocode | ||
| 6 | Type | Type | Riebesell, Ulf | |||
| 7 | Diffuse attenuation coefficient, downward | Kd | 1/m | Riebesell, Ulf | Quantum Cosine Deep Profiling Sensor QCD-900L | at 10-40 water depth |
| 8 | Diffuse attenuation coefficient, downward, standard deviation | Kd std dev | ± | Riebesell, Ulf | Quantum Cosine Deep Profiling Sensor QCD-900L | at 10-40 water depth |
| 9 | Radiation, photosynthetically active | PAR | µmol/m2/s | Riebesell, Ulf | Calculated | |
| 10 | Depth of the euphotic zone | z(eu) | m | Riebesell, Ulf | The depth of the euphotic zone is the depth were PAR was 1 % of subsurface PAR | |
| 11 | Comment | Comment | Riebesell, Ulf |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
317 data points