RRS Challenger C/1/82 (CH1/82)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierC/1/82 (CH1/82)
Cruise period1982-01-11 — 1982-01-18
Port of departureBarry, United Kingdom
Port of returnBarry, United Kingdom
Objectives1. To compare the vertical distribution and species composition of the overwintering plankton in the shallow shelf sea (100m) with the plankton from the deep ocean (>2000m), with special reference to C. helgolandicus.
2. To collect live material from a range of depths to determine whether or not the Calanus from the shelf sea are in a different physiological state from those in the deep ocean.
3. To determine the levels of extra-cellular digestive enzymes in Calanus from both sites and determine the effects of starvation on the enzyme activity.
4. To investigate the biotic conditions (chlorophyll, POC, phytoplankton etc.) and the hydrography at each of the station sites.
Chief scientistBob Williams (Institute of Marine Environmental Research, Plymouth)
Cruise reportRRS Challenger C/1/82 (CH1/82) cruise report ch1_82.pdf (0.10 MB) 
Ocean/sea areas 
GeneralBristol Channel
Celtic Sea
SpecificCeltic Sea
Track chartsRRS Challenger C/1/82 (CH1/82) cruise track — trk2634.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 7
Description: continuous recording
BathythermographQuantity: number of profiles = 5
CTD stationsQuantity: number of profiles = 4
Description: CTD with fluorometer
Suspended matterQuantity: number of profiles = 4
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 36
Description: Collected on 4 profiles for extracted chlorophyll.
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 4
Description: CTD with fluorometer
Particulate organic matter (inc POC, PON)Quantity: number of profiles = 4
PhytoplanktonQuantity: number of profiles = 4
ZooplanktonQuantity: number of samples = 461
Description: LHPR and RMT hauls. Samples preserved by drying, freezing or formalin for subsequent chemical analysis,
SestonQuantity: number of profiles = 4
Other biological/fisheries measurementQuantity: number of samples = 40
Description: extra-cellular enzyme activity
Data held at BODC 
Discrete samples 
17  General station with STD/bottles/additional instrumentsChlorophyll pigment concentrations in water bodies
Salinity of the water column
Phaeopigment concentrations in the water column