Citation:

PANGAEA.952100

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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.

Source:

CTD data of Cruise M181 in netcdf format

Coverage:

Median Latitude: -0.826447 * Median Longitude: -20.661707 * South-bound Latitude: -16.998900 * West-bound Longitude: -44.257130 * North-bound Latitude: 0.006270 * East-bound Longitude: 13.549940

Date/Time Start: 2022-04-21T15:12:48 * Date/Time End: 2022-05-20T18:05:38

Minimum DEPTH, water: 1.99 m * Maximum DEPTH, water: 5951.80 m

Event(s):

M181_2-1 (CTD001) * Latitude: -16.998880 * Longitude: 11.181800 * Date/Time: 2022-04-21T15:36:25 * Elevation: -1250.0 m * Location: South Atlantic Ocean * Campaign: (TRATLEQ 2) * Basis: * Method/Device: (CTD-RO)

M181_5-1 (CTD002) * Latitude: -16.000120 * Longitude: 11.566420 * Date/Time: 2022-04-21T23:56:46 * Elevation: -869.0 m * Location: South Atlantic Ocean * Campaign: (TRATLEQ 2) * Basis: * Method/Device: (CTD-RO)

M181_7-1 (CTD003) * Latitude: -14.999920 * Longitude: 12.066670 * Date/Time: 2022-04-22T06:40:24 * Elevation: -428.0 m * Location: South Atlantic Ocean * Campaign: (TRATLEQ 2) * Basis: * Method/Device: (CTD-RO)

Comment:

PO-GLOBAL-SVN = 975 used on 16-Dec-2022 12:30:42

Matlab = 9.4.0.813654 (R2018a)

Release = 3

nc_uncertainty_p = 2.000000

nc_uncertainty_t = 0.002000

nc_uncertainty_s = 0.003000

nc_uncertainty_o = 1.000000

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event		Krahmann, Gerd
2	DATE/TIME	Date/Time		Krahmann, Gerd	Geocode
3	LONGITUDE	Longitude		Krahmann, Gerd	Geocode
4	LATITUDE	Latitude		Krahmann, Gerd	Geocode
5	Pressure, water	Press	dbar	Krahmann, Gerd
6	DEPTH, water	Depth water	m	Krahmann, Gerd	Geocode
7	Temperature, water	Temp	°C	Krahmann, Gerd
8	Salinity	Sal		Krahmann, Gerd
9	Oxygen	O2	µmol/kg	Krahmann, Gerd
10	Sound velocity in water	SV	m/s	Krahmann, Gerd
11	Density, sigma, in situ	Sigma in situ	kg/m³	Krahmann, Gerd
12	Fluorescence	Fluorescence	arbitrary units	Krahmann, Gerd
13	Turbidity (Nephelometric turbidity unit)	Turbidity	NTU	Krahmann, Gerd
14	Nitrogen oxide	NOx	µmol/kg	Krahmann, Gerd
15	Radiation, photosynthetically active	PAR	µmol/m²/s	Krahmann, Gerd
16	Radiation, photosynthetically active, surface	SPAR	µmol/m²/s	Krahmann, Gerd
17	Chlorophyll total	Chl tot	µg/l	Krahmann, Gerd	calibrated chlorophyll

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

3098650 data points

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