Cruise inventory

RRS John Murray JM5/78 (C/3/78)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM5/78 (C/3/78)
Cruise period1978-05-09 — 1978-05-24
Port of departureBarry, United Kingdom
Port of returnBarry, United Kingdom
Objectives1. To measure levels of nutrients, chlorophyll, total suspended matter, organic matter and the zooplankton and phytoplankton populations.
2. To characterise the hydrographic conditions at the sites.
3. To measure the feeding rates and development times of two species of copepods at the two sites.
4. To measure uptake and release of nutrients by micro-organisms.
5. To measure the release of nutrients by zooplankton.
Chief scientistBob Williams (Institute of Marine Environmental Research, Plymouth)
Cruise reportRRS John Murray JM5/78 (C/3/78) cruise report john_murray5_78.pdf — access key 'C' (0.48 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
Bristol Channel
Track chartsRRS John Murray JM5/78 (C/3/78) cruise track — trk2020.html
Physical oceanography 
Surface measurements underway (T,S)
Water bottle stationsQuantity: number of stations = 20
CTD stationsQuantity: number of stations = 31
Chemical oceanography 
PhosphateQuantity: number of cores = 35
Total - PQuantity: number of cores = 35
NitrateQuantity: number of cores = 35
NitriteQuantity: number of cores = 35
SilicateQuantity: number of cores = 35
Suspended matterQuantity: number of cores = 240
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of cores = 200
Particulate organic matter (inc POC, PON)Quantity: number of cores = 200
Dissolved organic matter (inc DOC)Quantity: number of cores = 200
PhytoplanktonQuantity: number of cores = 200
ZooplanktonQuantity: number of cores = 59
Description: biomass, monitoring, distribution etc
SestonQuantity: number of cores = 200
Routine standard measurements
Data held at BODC 
Discrete samples 
458  General station with STD/bottles/additional instrumentsChlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Dissolved organic carbon concentration in the water column
Salinity of the water column
Nitrate concentration parameters in the water column
Temperature of the water column
Phaeopigment concentrations in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column