RRS Challenger CH10/81

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH10/81
Cruise period1981-07-04 — 1981-07-14
Port of departureBarry, United Kingdom
Port of returnArdrossan, United Kingdom
ObjectivesThe objectives of this cruise were:
(1) To service the current meter mooring at 57N, 9W and the corrosion potential current meter mooring off South Uist. Current meter mooring recovered and re-laid. South Uist mooring recovered, but not re-laid.
(2) To make an extensive CTD survey of the Scottish Coastal Current between the North Channel and Cape Wrath, including large-volume surface sampling for radiocaesium analysis. Large number of CTD sections worked, covering the whole of the NW Scottish shelf, including a section of the eastern Ellett Line.
(3) To collect sediment cores with the WHOI tripod at locations along the axis of the Scottish Coastal Current. Cores obtained at five of six planned sites.
(4) To measure chlorophyll concentrations over the shelf and shelf-edge. Accomplished.
(5) To work two CTD sections across the continental slope. Accomplished.
(6) To collect large-volume surface water samples for radiocaesium analysis. Accomplished.
Chief scientistDavid T Meldrum (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH10/81 cruise report ch10_81.pdf (0.25 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificN.E. Atlantic
Track chartsRRS Challenger CH10/81 cruise track — ch10_81track.pdf (0.07 MB) 
Physical oceanography 
Surface measurements underway (T,S)
CTD stationsQuantity: number of stations = 139
Description: noisy salinity
Current metersQuantity: number of stations = 1
Description: mooring with 2 c.m.recovered and relaid;90 days
Other physical oceanographic measurementsQuantity: activity duration in days = 80
Description: one corrosion potential c.m.
Chemical oceanography 
RadioactivityQuantity: number of samples = 101
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: chlorophyl,continuous fluorometer and discrete samples
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 5