Cruise inventory

RV Cirolana CIR4/99

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cirolana (74CZ)
Cruise identifierCIR4/99
Cruise period1999-07-09 — 1999-07-26
StatusCompleted
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
PurposeFisheries
ObjectivesA plankton survey to determine the distribution and abundance of edible crab larvae in relation to fishing grounds and seabed sediments. The survey was conducted with a high-speed plankton sampler equipped with CTD and fluorometer on two grids of stations from 52° 30'N to 55° 15'N and 01° 30'W to 3° 00'E. Two Argos satellite tracked drifting buoys were released off the north Norfolk coast.
A side-scan sonar survey was conducted in two areas (East of the Race Bank and East of the East Dudgeon Shoal).
Chief scientistStephen Paul Milligan (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)
Cruise reportRV Cirolana CIR4/99 cruise report ci4_99.pdf — access key 'C' (0.25 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorfolk Coast to the Tees and over the Dogger Bank
Track chartsRV Cirolana CIR4/99 cruise track — trk4355a.html RV Cirolana CIR4/99 cruise track — trk4355b.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of stations = 199
Description: Discrete samples taken from the surface for salinity and chlorophyll-a analysis
Surface measurements underway (T,S)Quantity: activity duration in days = 12
Description: Surface water intake measurements are available for every 15 mins of cruise track. Salinity, temperature and surface light data are available.
Subsurface temperature and salinity measurementsQuantity: number of stations = 199
Description: CTD data is available for each plankton station, as are data for chlorophyll-a fluorescence and light
Optics (eg underwater light levels)Quantity: number of stations = 199
Description: CTD data is available for each plankton station, as are data for chlorophyll-a fluorescence and light
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 199
Description: Discrete samples taken from the surface for salinity and chlorophyll-a analysis
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 199
Description: CTD data is available for each plankton station, as are data for chlorophyll-a fluorescence and light
ZooplanktonQuantity: number of stations = 141
Description: High speed plankton samples taken on double-oblique tows. Crab larvare will be sorted, identified and staged. Main grid covering the area 52deg 30'N to 55deg 15'N and 01deg 30'W to 03deg 00'E.
ZooplanktonQuantity: number of stations = 58
Description: Analysis as above. Finer scale grid covering area 53deg 00'N to 54deg 00'N and 00deg 30'W to 2deg 00'E.
Geology and geophysics 
Long/short range side scan sonarQuantity: track kilometres = 103.712
Description: Side-scan sonar survey east of Race Bank. 14 transect lines, 200m apart, approximately 4 nautical miles long.
Long/short range side scan sonarQuantity: track kilometres = 107.416
Description: Side-scan sonar survey east of East Dudgeon Shoals. 12 transect lines, 200m apart, approximately 4.8 nautical miles long.
Moorings, landers, buoys 
Physical oceanography 
Surface drifters/drifting buoys53° 30' 0" N  1° 7' 59" E — Argos satellite tracked buoys, drogues set at 10m - deployed on 10 and 11 July
Surface drifters/drifting buoys53° 12' 0" N  1° 0' 0" E — Argos satellite tracked buoys, drogues set at 10m - deployed on 10 and 11 July