Resources

RRS Discovery D233

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD233
Cruise period1998-04-23 — 1998-06-01
StatusCompleted
Port of departureSanta Cruz de Tenerife, Spain
Port of returnFairlie, United Kingdom
PurposeResearch
Objectives1. To repeat a section, notionally along 20W in the Northeast Atlantic, parts of which were occupied previously in 1957, 1973, 1983, 1988 and 1991, in order to examine the decadal scale variability in the eastern Atlantic over the last 40 years.
2. To establish the sources and sinks of halocarbons in subtropical and subpolar waters during spring bloom conditions.
3. To study the spreading, mixing and ventilation rates of Labrador Sea Water, Mediterranean Water, and waters of Southern Ocean origin (Antarctic Intermediate Water and Antarctic Bottom Water) which extend into the Northeast Atlantic.
4. To make a detailed study of the water masses in the Rockall Trough, incorporating the Ellett Line section, with particular emphasis on their circulation/recirculation patterns.
5. To contribute to the WOCE baseline survey of the North Atlantic.
Chief scientistDenise Smythe-Wright (Southampton Oceanography Centre)
Cruise reportRRS Discovery D233 cruise report d233.pdf (2.37 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
SpecificNorth Atlantic
Track chartsRRS Discovery D233 cruise track — d233trk.pdf (0.10 MB) 
Measurements 
Physical oceanography 
BathythermographQuantity: number of profiles = 35
Description: XBTs
CTD stationsQuantity: number of profiles = 139
Current profiler (eg ADCP)
Data held at BODC Get data
Discrete samples 
140  CTD frame plus rosette samplerReference numbers
Transmittance and attenuance of the water column
Temperature of the water column
Dissolved oxygen parameters in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Silicate concentration parameters in the water column
Density of the water column
Chlorofluorocarbon concentrations in the water column
Nitrate concentration parameters in the water column
Phaeopigment concentrations in the water column
Alkalinity, acidity and pH of the water column
Chlorophyll pigment concentrations in water bodies
35  Expendable BathythermographTemperature of the water column
96  Sample taken from ship's non-toxic supplySalinity of the water column
26839  Shipborne Acoustic Doppler Current Profile