RRS Challenger CH4/80

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH4/80
Cruise period1980-02-26 — 1980-03-07
Port of departureBarry, United Kingdom
Port of returnBarry, United Kingdom
ObjectivesThe objectives of this cruise were:
(1) Deploy current meter moorings at 57N, 9W and deploy moorings at two stations on the Rockall via Anton Dohrn Seamount section. Accomplished.
(2) Work the Rockall via Anton Dohrn Seamount (Ellett Line) CTD section. Accomplished.
(3) Work additional CTD sections in the northern Rockall Channel. Not attempted.
(4) Collect large-volume surface water sample for radiocaesium analysis from Scottish shelf stations. Accomplished with CTD profiles on all but one station.
(5) Obtain epibenthic sled samples at the SMBA permanent station (54° 40 min N, 12° 16 min W). Accomplished.
(6) Obtain deep plankton samples at the SMBA permanent section using the rectangular mid-water trawl. Accomplished.
(7) Obtain Assagiz trawl samples between the Anton Dohrn Seamount and the St Kilda continental slope. One good sample was obtained.
Chief scientistDavid T Meldrum (Scottish Marine Biological Association), John D Gage (Scottish Marine Biological Association)
Cruise reportRRS Challenger CH4/80 cruise report ch4_80.pdf (0.15 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificRockall Channel/ Scottish Cont. Shelf
Track chartsRRS Challenger CH4/80 cruise track — trk2570.html
Physical oceanography 
Water bottle stationsQuantity: number of stations = 15
Description: S surface only
CTD stationsQuantity: number of stations = 38
Description: noisy salinity
Subsurface temperature and salinity measurementsDescription: surface temperature and salinity obtained on passage between the permanent station and station F, and midway between CTD stations on the continental shelf.
Current metersQuantity: number of deployments = 3
Description: Deployment only.
Chemical oceanography 
RadioactivityQuantity: number of samples = 10
Description: water samples obtained for radio-caesium analysis.