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RRS Challenger CH10/84

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH10/84
Cruise period1984-11-16 — 1984-12-06
StatusCompleted
Port of departureArdrossan, United Kingdom
Port of returnCampbeltown, United Kingdom
PurposeResearch
Objectives1. To recover current meter mooring LG in Beaufort's Dyke, North Channel and to relay it with two additional moorings, LE and LF, for recovery in January 1985.
2. To collect bottom cores for plutonium analysis at the current meter sites LE, LF and LG in the North Channel and to take near bottom 60 litre water samples at the coring stations for the Fisheries Laboratory, Lowestoft.
3. To service SMBA current meter moorings F (57º 30.60'N, 12º 13.3'W) and Y (Tiree Passage) and to lay a near surface current mooring S South-east of Islay (55º 35.0'N, 6º 3.0'W) to work the CTD section from Rockall to the Anton Dohrn Seamount (Ellett Line).
4. To work shelf CTD sections from the northern Irish Sea to the Butt of Lewis and to collect radiocaesium samples on some sections for Chemistry Department, Glasgow University.
5. To collect surface, midwater and near-bottom samples for radiocaesium determination by the Fisheries Laboratory, Lowestoft, at ten standard positions between the Sound of Mull and the shelf edge, to make CTD observations at these sites and to take cores at stations with suitable bottom deposits.
6. To make a CTD survey of the Clyde Sea area.
Chief scientistAnton Edwards (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH10/84 cruise report ch10_84.pdf (0.22 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
Irish Sea and St. George's Channel
North East Atlantic Ocean (limit 40W)
SpecificIrish Sea/ Firth of Clyde/ Minches/ W. Scotland
Track chartsRRS Challenger CH10/84 cruise track — trk3298.html RRS Challenger CH10/84 cruise track — trk3298a.html RRS Challenger CH10/84 cruise track — trk3298b.html
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 122
Description: S surface 120 S bottom
CTD stationsQuantity: number of stations = 120
Current metersQuantity: number of deployments = 8
Description: 1 recovered;2 months
Chemical oceanography 
RadioactivityQuantity: sample litres = 50
Description: surface water samples taken for radiocaesium determination.
Isotopes
Contamination 
Other contaminant measurementsQuantity: number of cores = 4
Description: bottom cores for plutonium analysis