RV Cirolana CIR4/81

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cirolana (74CZ)
Cruise identifierCIR4/81
Cruise period1981-03-31 — 1981-04-23
Port of departureGrimsby, United Kingdom
Port of returnGrimsby, United Kingdom
Objectives1. To undertake a detailed survey of water column conditions over and around the Finn seamount which lies close to the dumpsite.
2. To retrieve three current meter moorings laid around the seamount in October 1980.
3. To collect water and trap fish at the site and at a position 100 miles to the south of it for AEP 1.
4. To calibrate (a) the Guildline deep-water CTD and (b) the athwartships component of the EM log.
5. To seach the region 46º-50º, 20º-22ºW for eddy features similar to that found at 47ºN 15ºW during the Tourbillon 79 exercise and in particular to map the distribution of dissolved oxygen and silicate.
6. To identify the water mass structure in the vicinity of the MAFF Slope Section current meters (area 38ºN, 10ºW) at least once during the cruise.
7. To confirm the existence of two nephel plumes in the Porcupine Bank region AEP 3.
Chief scientistJohn W Ramster (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Cirolana CIR4/81 cruise report ci4_81.pdf (0.26 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificN.E. Atlantic
Track chartsRV Cirolana CIR4/81 cruise track — trk2646.html
Physical oceanography 
BathythermographQuantity: number of profiles = 51
Water bottle stationsQuantity: sample litres = 500
Description: of surface and bottom water.
CTD stationsQuantity: number of stations = 34
Current metersQuantity: number of stations = 3
Chemical oceanography 
RadioactivityQuantity: number of samples = 6