Cruise inventory

RRS John Murray JM16/76 (B/10/76)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM16/76 (B/10/76)
Cruise period1976-11-16 — 1976-11-24
StatusCompleted
Port of departureBarry, United Kingdom
Port of returnBarry, United Kingdom
PurposeResearch
ObjectivesBristol Channel survey:
1) To study the geochemistry of the seawater sediment interface
2) To investigate the critical chemical processes which occur at this interface in relation to the water chemistry of the estuarine systems
3) To compare the chemistry at this interface in an area of active disposition and unstable areas.
Chief scientistPeter G Watson (Institute of Marine Environmental Research, Plymouth)
Cruise reportRRS John Murray JM16/76 (B/10/76) cruise report john_murray16_76.pdf — access key 'C' (0.13 MB) 
Ocean/sea areas 
GeneralBristol Channel
Track chartsRRS John Murray JM16/76 (B/10/76) cruise track — trk1692.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of stations = 6
Description: S only
Water bottle stationsQuantity: number of stations = 6
CTD stationsQuantity: number of stations = 6
Chemical oceanography 
OxygenQuantity: number of stations = 6
Other dissolved gasesQuantity: number of stations = 5
PhosphateQuantity: number of stations = 6
Nitrate
AlkalinityQuantity: number of stations = 6
pHQuantity: number of stations = 6
Trace elementsQuantity: number of stations = 6
RadioactivityQuantity: number of samples = 2
Contamination 
Suspended matterQuantity: number of stations = 6
Trace metalsQuantity: number of stations = 6
Biology and fisheries 
ZoobenthosQuantity: number of samples = 1
Description: survey:population,energy transfers,biomass determination etc.
Geology and geophysics 
DredgeQuantity: number of deployments = 2
GrabQuantity: number of samples = 1
Core - soft bottomQuantity: number of cores = 27
Description: 6 chemical analysis of sediments
In-situ seafloor measurement/samplingQuantity: number of deployments = 1
Description: radioactivity msmnts.