RV CIRLANA 6B/1987: Low-Resolution CTD Profiles from the European Shelf

Research vessel profiles collected by CEFAS or DFR provide conductivity, temperature, and depth data across the European Shelf and Iberian Abyssal Plain. The data originates from lowered CTD rosette systems, with calibration samples taken via water bottles fired on the up cast. Over time, additional sensors like fluorometers and transmissometers were incorporated, though the exact parameters vary by cruise.

Use Cases

• Calculate salinity from conductivity data using the UNESCO 1978/1983 formulations mentioned in the description
• Analyze vertical water column profiles based on the surface-to-sea-bed cast data collection method
• Study temporal changes in marine sensor technology based on the described evolution from basic CTD to fluorometer and transmissometer additions
• Calibrate oceanographic models using the station-based profile data collected when the vessel was stationary

Strengths

• Data collection method is explicitly described as using a lowered CTD rosette system for clean down-cast profiles
• Geographic coverage is specified as the European Shelf with some data from the Iberian Abyssal Plain
• Historical context is provided, noting the evolution from basic parameters to additional sensors like fluorometers

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment for large-scale ML tasks
• Last update date is unknown; freshness unverified

Provenance

Source

Government Digital Service

Collection Method

Data collected from CEFAS (or DFR) research surveys using a lowered CTD rosette system, with water bottle samples for calibration.

Time Range

unknown

Freshness

unknown

Geography

Broadly covers the European Shelf with some data from the Iberian Abyssal Plain.