Planned maintenance — 18th January 2018 12:00 to 22nd January 2018 09:00 [more]

Cruise inventory

RRS John Murray JM12/79 (B/5/79)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM12/79 (B/5/79)
Cruise period1979-08-07 — 1979-08-16
Port of departureBarry, United Kingdom
Port of returnPlymouth, United Kingdom
Objectives1) To continue a series of cruises to monitor the performance of the Bristol Channel

2) To measure processes involved in the turnover of nitrogenous nutrients in a mixed water column in Carmarthen Bay
Chief scientistIan Joint (Institute of Marine Environmental Research, Plymouth)
Cruise reportRRS John Murray JM12/79 (B/5/79) cruise report john_murray12_79.pdf — access key 'C' (0.10 MB) 
Ocean/sea areas 
GeneralBristol Channel
Track chartsRRS John Murray JM12/79 (B/5/79) cruise track — john_murray12_79track.pdf (0.02 MB) 
Physical oceanography 
Surface measurements underway (T,S)Description: continuous recording,240 miles approx.
Transparency (eg transmissometer)Description: continuous recording,240 miles approx.
Chemical oceanography 
NitrateDescription: continuous recording,240 miles approx.
Suspended matterDescription: continuous recording,240 miles approx.
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: continuous recording,240 miles approx.
Particulate organic matter (inc POC, PON)Quantity: number of stations = 30
ZooplanktonQuantity: number of stations = 24
Description: identification,distribution,energy transfers
ZoobenthosQuantity: number of stations = 1
Data held at BODC 
Discrete samples 
204  General station with STD/bottles/additional instrumentsChlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Salinity of the water column
Concentration of suspended particulate material in the water column
Nitrate concentration parameters in the water column
Temperature of the water column
Nitrite concentration parameters in the water column
Phaeopigment concentrations in the water column
Phosphate concentration parameters in the water column