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Karstensen, Johannes; Krahmann, Gerd; Dilmahamod, Ahmad Fehmi (2025): Physical oceanography (CTD) during METEOR cruise M184 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.986330 (DOI registration in progress)

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Published: 2025-11-10

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Abstract:
Seabird 911plus systems equipped with dual temperature-conductivity-oxygen sensors were employed. All systems 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.
Keyword(s):
Chlorophyll a; CTD casts; Dissolved oxygen; hydrographical profiles; nitrate; subpolar North Atlantic
Related to:
Karstensen, Johannes; Schmidtko, Sunke; Begler, Christian; Blum, Lea Katharina; Debly, Augustin; Dilmahamod, Ahmad Fehmi; Fortin, Anne-Sophie; Fröhle, Jörg; Garden, Pia; Gößling, Paula; Großelindemann, Hendrik; Henning, Philipp; Horstmann, Jochen; Jones, Samual Charles; Lindl, Mario; Margirier, Felix Armand; Melzer, Hannah; Pinck, Andreas; Raeke, Andreas; Wallace, Elizabeth; Wenzel, Anna Julia; Witting, Paul Jasper (2023): Understanding processes and long-term variability in the Labrador Sea, Cruise No. M184, 12. August 2022 - 15. September 2022, St. John's (Canada) - Hamburg (Germany). METEOR-Berichte, Begutachtungspanel Forschungsschiffe, M184, 47 pp, https://doi.org/10.48433/cr_m184
Source:
CTD data of Cruise M184 in netcdf format [dataset]. M184_ctd_rel6.zip
Funding:
Horizon 2020 (H2020), grant/award no. 862626: EuroSea - Improving and Integrating European Ocean Observing and Forecasting Systems for Sustainable use of the Oceans
Coverage:
Median Latitude: 56.441475 * Median Longitude: -44.996522 * South-bound Latitude: 47.555130 * West-bound Longitude: -52.670820 * North-bound Latitude: 58.828700 * East-bound Longitude: -28.080440
Date/Time Start: 2022-08-12T19:21:13 * Date/Time End: 2022-09-08T15:48:23
Minimum DEPTH, water: 1.98 m * Maximum DEPTH, water: 3753.40 m
Event(s):
M184_1-1 (CTD001) * Latitude: 47.555130 * Longitude: -52.580700 * Date/Time: 2022-08-12T19:26:09 * Elevation: -181.0 m * Campaign: M184 (LabSeaVar2022) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M184_9-1 (CTD002) * Latitude: 53.048220 * Longitude: -51.081650 * Date/Time: 2022-08-15T03:45:33 * Elevation: -2617.0 m * Campaign: M184 (LabSeaVar2022) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M184_10-1 (CTD003) * Latitude: 52.964650 * Longitude: -51.312670 * Date/Time: 2022-08-15T08:13:04 * Elevation: -2263.0 m * Campaign: M184 (LabSeaVar2022) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
Comment:
PO-GLOBAL-SVN = 1119 used on 12-Dec-2023 17:42:04
Matlab = 9.14.0.2337262 (R2023a) Update 5
Release = 6
nc_uncertainty_p = 2.000000
nc_uncertainty_t = 0.002000
nc_uncertainty_s = 0.003000
nc_uncertainty_o = 1.000000
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventKarstensen, Johannes
2DATE/TIMEDate/TimeKarstensen, JohannesGeocode
3LONGITUDELongitudeKarstensen, JohannesGeocode
4LATITUDELatitudeKarstensen, JohannesGeocode
5Pressure, waterPressdbarKarstensen, JohannesCTD
6DEPTH, waterDepth watermKarstensen, JohannesGeocode
7Temperature, waterTemp°CKarstensen, JohannesCTD
8SalinitySalKarstensen, JohannesCTD
9OxygenO2µmol/kgKarstensen, JohannesCTD
10Sound velocity in waterSVm/sKarstensen, JohannesCTD
11Density, sigma, in situSigma in situkg/m3Karstensen, JohannesCTD
12FluorescenceFluorescencearbitrary unitsKarstensen, JohannesCTDchl2_raw
13Turbidity (Nephelometric turbidity unit)TurbidityNTUKarstensen, JohannesCTDturb_raw
14Nitrogen oxideNOxµmol/kgKarstensen, JohannesCTD
15Radiation, photosynthetically activePARµmol/m2/sKarstensen, JohannesCTD
16Radiation, photosynthetically active, surfaceSPARµmol/m2/sKarstensen, JohannesCTD
17Chlorophyll aChl aµg/lKarstensen, JohannesCTD
18Quality flag, timeQF timeKarstensen, Johannes
19Quality flag, longitudeQF lonKarstensen, Johannes
20Quality flag, latitudeQF latKarstensen, Johannes
21Quality flag, water pressureQF water pressKarstensen, Johannes
22Quality flag, water depthQF water depthKarstensen, Johannes
23Quality flag, water temperatureQF water tempKarstensen, Johannes
24Quality flag, salinityQF salKarstensen, Johannes
25Quality flag, oxygenQF O2Karstensen, Johannes
26Quality flagQFKarstensen, Johannesss_qc
27Quality flagQFKarstensen, Johannessth_qc
28Quality flagQFKarstensen, Johanneschl2_raw_qc
29Quality flagQFKarstensen, Johannesturb_raw_qc
30Quality flagQFKarstensen, Johannesnox_qc
31Quality flagQFKarstensen, Johannespar_qc
32Quality flagQFKarstensen, Johannesspar_qc
33Quality flag, chlorophyll aQF chl aKarstensen, JohannesCTDchl_qc
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
6735736 data points

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