Dengler, Marcus; Krahmann, Gerd (2026): Physical oceanography (CTD) during METEOR cruise M189 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.993682
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Published: 2026-04-20 • DOI registered: 2026-04-20
Abstract:
94 CTD profiles from the Northern Benguela and Tropical Angolan Upwelling region collected using Seabird 911plus system equipped with dual temperature-conductivity-oxygen sensors. The system had a 24-bottle water sampling rosette with 10 l Niskin bottles. Water sampling, processing, and calibration followed GO-SHIP recommendations (Swift, 2010; McTaggart et al., 2010; Uchida et al., 2010) and included the recommended steps Data Conversion, Sensor Time-Alignment, Creation of Bottle Files, Outlier Removal, Pressure Sensor Filtering, Conductivity Cell Thermal Mass Correction, Ship Roll Correction and Deck Offset Correction by Loop Editing, as well as Derivation of Calculated Properties. After these steps, conductivity and oxygen readings were calibrated against values determined with salinometry and Winkler titration , respectively. Finally, the downcast data was averaged over 1 dbar wide intervals. An independent upcast calibration was used to obtain calibrated CTDO values coincident with the discrete water samples.
Related to:
Dengler, Marcus; Arévalo-Martínez, Damian L; Aroucha, Léo Costa; Awo, Founi Mesmin; Begler, Christian; Eisnecker, Paula; Elsäßer, Antje; Friedrich, Berit; Henning, Philipp; Anicet, Rodrigue; Kounge, Imbol; Jacobsen, Mats; Körner, Mareike; Krahmann, Gerd; Melzer, Hannah; Mock, Leon-Cornelius; Mrozowska, Marta A; Nielsen, Martina; Otte, Frank; Perschon, Justus; Pöhnl, Denise; Reese, Nina R; Söder, Jens; Stockmayer, Vera; Wölker, Yannick (2024): Benguela Niños: Physical Processes in Upwelling Regions and Long-Term Variability, Cruise No. M189/1, April 16 - May 13, 2023, Walvis Bay (Namibia) - Walvis Bay (Namibia). METEOR-Berichte, Begutachtungspanel Forschungsschiffe, M189/1, 52 pp, https://doi.org/10.48433/cr_m189_1
Source:
CTD data of Cruise M189 in netcdf format [dataset]. met_189_1_ctd_nc_rel3.zip
Project(s):
Funding:
Horizon 2020 (H2020), grant/award no. 817578: Tropical and South Atlantic climate-based marine ecosystem predictions for sustainable management
Coverage:
Median Latitude: -15.205132 * Median Longitude: 11.951643 * South-bound Latitude: -23.034180 * West-bound Longitude: 9.998700 * North-bound Latitude: -6.209470 * East-bound Longitude: 14.367790
Date/Time Start: 2023-04-16T14:04:53 * Date/Time End: 2023-05-10T04:42:05
Minimum DEPTH, water: 0.99 m * Maximum DEPTH, water: 3610.18 m
Event(s):
M189_1-1 * Latitude: -22.999380 * Longitude: 13.499470 * Date/Time: 2023-04-16T14:12:52 * Elevation: -240.0 m * Campaign: M189 (BANINO) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M189_3-1 * Latitude: -22.999020 * Longitude: 13.631480 * Date/Time: 2023-04-16T17:08:40 * Elevation: -151.0 m * Campaign: M189 (BANINO) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M189_5-1 * Latitude: -23.001230 * Longitude: 13.707270 * Date/Time: 2023-04-16T19:58:32 * Elevation: -153.0 m * Campaign: M189 (BANINO) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Dengler, Marcus | |||
| 2 | DATE/TIME | Date/Time | Dengler, Marcus | Geocode | ||
| 3 | LONGITUDE | Longitude | Dengler, Marcus | Geocode | ||
| 4 | LATITUDE | Latitude | Dengler, Marcus | Geocode | ||
| 5 | Pressure, water | Press | dbar | Dengler, Marcus | CTD | |
| 6 | DEPTH, water | Depth water | m | Dengler, Marcus | CTD | Geocode |
| 7 | Temperature, water | Temp | °C | Dengler, Marcus | CTD | |
| 8 | Pressure, water | Press | dbar | Dengler, Marcus | CTD | |
| 9 | Oxygen | O2 | µmol/kg | Dengler, Marcus | CTD | |
| 10 | Sound velocity in water | SV | m/s | Dengler, Marcus | CTD | |
| 11 | Density, sigma-theta (0) | Sigma-theta | kg/m3 | Dengler, Marcus | CTD | |
| 12 | Fluorescence | Fluorescence | arbitrary units | Dengler, Marcus | CTD | |
| 13 | Turbidity (Nephelometric turbidity unit) | Turbidity | NTU | Dengler, Marcus | CTD |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
579960 data points
Download Data
View dataset as HTML (shows only first 2000 rows)