Cruise 64PE431: a south to north hydrographic transect in the central Caribbean Sea in February 2018.

This data set consist of CTD data collected on board the RV Pelagia during cruise 64PE431. This cruise started in Oranjestad, Aruba on 4 February 2018 and ended in Phillipsburg, Sint Maarten on 11 February 2018. The cruise consisted of a survey across the Caribbean Sea, with hydrographic stations performed between the 1200 m isobath north of Aruba to the 800 m isobaths just south of the Dominican Republic. The aim of these measurements was to document the background hydrography of the Caribbean Sea as well as the hydrographic and velocity structure of a Caribbean anticyclone. A large anticyclone was detected north of Aruba with the use of altimetry field before the start of the cruise. The CTD station positions were adjusted in order to transect the center of this anticyclone. Furthermore four Argo floats provided by the European Argo program were deployed at hydrographic stations. Details on the floatnumbers can be found in the cruise report.


Physical oceanography


CTD, Caribbean Sea, hydrography, Pelagia, 64PE431, NICO, anticyclone


A recently (November 2017) calibrated SBE 9/11+ CTD has been used to measure temperature, salinity, and chlorophyll/turbidity profiles. The sensors mounted on the CTD were an SBE3 temperature sensor SN-032118, SBE4 conductivity sensor SN-1204, a Digiquatz pressure sensor SN-127486. Also mounted were a Wetlabs CStar beam transmission meter SN-CST-1406DR (calibrated September 2017) with a path length of 25 cm and a SBE43 Oxygen sensor SN-043-0350 (calibrated July 2016). Chlorophyll was recorded by a Chelsea Aqua 3 Fluorometer SN-092 (calibrated October 2017) and a Wetlabs ECO-FLNT NS-4787 (calibrated July 2017) that additionally measured turbidity. PAR/Irradiance was measured by a Chelsea licor sensor SN-118 (calibrated July 2014). The CTD was mounted in a rack containing water samplers. 

Four salinity samples were taken from the up-cast of each of the CTD stations. Depths with minimum salinity gradients were selected for these samples. The sample bottles were taken to the labcontainer in the ship’s hold where they rested for at least 24 hour to equilibrate to container temperature. The samples were analysed on the Guildline Autosal SN-66179. Each measurement started and ended with a standard seawater calibration, OSIL batch P161. Additional standard calibration was done every 15 samples. Results from these reference salinity measurements were used to calibrate the CTD conductivity sensor.

For the data collection the Seasave software for Windows (version V 7.26.7), produced by SBE, was used. The CTD data were recorded with a frequency of 24 data cycles per second. After each CTD cast the data were copied to the appropriate directory on the hard disk of the ship's computer network, where a daily back-up copy was made.
The CTD data were processed with the recently obtained calibration data, using the Seasoft software, also produced by SBE, and reduced to 1 dbar average ASCII files. 



Cruise report
CTD station 1 cast 1
152 KoCSVProcessed data
CTD station 2 cast 1
335 KoCSVProcessed data
CTD station 3 cast 1
558 KoCSVProcessed data
CTD station 4 cast 1
231 KoCSVProcessed data
CTD station 5 cast 1
231 KoCSVProcessed data
CTD station 6 cast 2
231 KoCSVProcessed data
CTD station 7 cast 2
231 KoCSVProcessed data
CTD station 8 cast 1
432 KoCSVProcessed data
CTD station 9 cast 1
231 KoCSVProcessed data
CTD station 10 cast 2
231 KoCSVProcessed data
CTD station 11 cast 2
231 KoCSVProcessed data
CTD station 12 cast 1
543 KoCSVProcessed data
CTD station 13 cast 1
466 KoCSVProcessed data
CTD station 14 cast 2
237 KoCSVProcessed data
CTD station 15 cast 1
95 KoCSVProcessed data
How to cite
de Jong Marieke Femke (2019). Cruise 64PE431: a south to north hydrographic transect in the central Caribbean Sea in February 2018. SEANOE.

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