Cruise inventory

RRS John Murray JM2/79 (B/1/79, C/1/79)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM2/79 (B/1/79, C/1/79)
Cruise period1979-01-11 — 1979-01-22
StatusCompleted
Port of departureBarry, United Kingdom
Port of returnBarry, United Kingdom
PurposeResearch
ObjectivesSurveys in the Bristol Channel and Carmarthen Bay with the objectives:

1a) To measure levels of nutrients, chlorphyll, total suspended matter, organic matter and the zooplankton and phytoplankton populations.
1b) To characterise the hydrographic conditions at the two sites.
1c) To measure the feeding rates and development time of copepod at 2 sites

2) To continue a series of cruises to monitor the performance of the Bristol Channel area to update the validation of the ecosystem model GEMBASE.
Chief scientistBob Williams (Institute of Marine Environmental Research, Plymouth)
Cruise reportRRS John Murray JM2/79 (B/1/79, C/1/79) cruise report john_murray2_79.pdf — access key 'C' (0.22 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Bristol Channel
SpecificCarmarthen Bay
Track chartsRRS John Murray JM2/79 (B/1/79, C/1/79) cruise track — john_murray2_79track.pdf (00 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Description: see cruise tracks
Chemical oceanography 
PhosphateQuantity: number of stations = 125
Total - PQuantity: number of stations = 125
NitrateQuantity: number of stations = 125
NitriteQuantity: number of stations = 125
SilicateQuantity: number of stations = 125
Contamination 
Suspended matterQuantity: number of stations = 58
Biology and fisheries 
Primary productivityQuantity: number of stations = 1
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 125
Particulate organic matter (inc POC, PON)Quantity: number of stations = 88
PhytoplanktonQuantity: number of stations = 58
ZooplanktonQuantity: number of stations = 44
Description: identification,distribution,biomass,monitoring
SestonQuantity: number of stations = 125
Data held at BODC 
Discrete samples 
274  General station with STD/bottles/additional instrumentsChlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Salinity of the water column
Dissolved organic carbon concentration in the water column
Concentration of suspended particulate material in 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