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RRS Challenger CH114

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH114
Cruise period1994-08-15 — 1994-08-29
StatusCompleted
Port of departureMallaig, United Kingdom
Port of returnOban, United Kingdom
PurposeResearch
Objectives1. To work the CTD stations of the Anton Dohrn Seamount (Ellett Line) section, between the shelf-edge and Rockall to continue the Rockall Trough time-series as a UK contribution to WOCE Goal 2.
2. To recover and possibly redeploy a temperature-salinity recorder and thermistor chain at station M of the Anton Dohrn section.
3. To service the DML current meter mooring in the Tiree Passage.
4. To obtain 137Cs, 234Th and 210Pb samples at CTD stations in the Sea of Hebrides for the DML/SURRC LOIS Special Topic.
5. To sample benthos at the SMBA Permanent Station (54º 40'N, 12º 16'W) using the epibenthic sled.
6. To collect a suite of physical, nutrient and biological profiles and samples, including coring, at the shelf-edge.
7. To obtain sulphate reduction and oxygen uptake measurements on multiple corer samples taken across the shelf edge on the LOIS line.
8. To sample benthos using the epibenthic sled on the 2500m contour and also at Station M and on the slope as time and weather permit.
9. To test the Strathclyde University multi-parameter instrument.
10. To collect samples for the EC MAST II Genetic variations in deep sea populations project.
Chief scientistJoseph M Graham (Dunstaffnage Marine Laboratory)
ProjectWOCE/LOIS-SES
Coordinating bodyWOCE SSG/NERC
Cruise reportRRS Challenger CH114 cruise report ch114_94.pdf (0.74 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificNE Atlantic, cont. Shelf, Rockall Trough, LOIS Box, 5610N;840W-5650N;1010W
Track chartsRRS Challenger CH114 cruise track — trk4075.html
Measurements 
Physical oceanography 
CTD stationsQuantity: number of profiles = 106
Current metersQuantity: number of stations = 1
Description: 2 current meters serviced on one mooring
Chemical oceanography 
OxygenQuantity: number of profiles = 106
Description: CTD sensor Received, ICES, but rejected
NitrateQuantity: number of stations = 70
AmmoniaQuantity: number of stations = 70
SilicateQuantity: number of stations = 70
IsotopesQuantity: number of samples = 7
Description: surface water samples for 137Cs and 234Th
IsotopesQuantity: number of profiles = 5
Description: mid and bottom water samples for 137Cs and 234Th
IsotopesQuantity: number of cores = 2
Description: 210Pb
Other chemical oceanographic measurementsQuantity: number of cores = 5
Description: sediment samples for sulphate reduction
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 106
Description: CTD sensor
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 70
Description: Extracted chlorophyll on water samples
ZoobenthosQuantity: number of hauls = 3
Description: epibenthic sledge
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 2
Description: using Sholkovich corer
Core - soft bottomQuantity: number of deployments = 5
Description: multicorer
Moorings, landers, buoys 
Physical oceanography 
Subsurface temperature measurements56° 16' 59" N  10° 25' 0" W — Rec. 170894;thermistor chain,c,t,p logger at 500m/2220m sounding
Current meters56° 37' 0" N  6° 24' 0" W — Mooring serv.150894, 2 current meters (23m, 33m), 48m sounding