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

Cruise inventory

RRS John Murray JM4A/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM4A/76
Cruise period1976-04-02 — 1976-04-13
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
ObjectivesFLEX/JONSDAP 76
Chief scientistBob Williams (Institute of Marine Environmental Research, Plymouth)
ProjectJONSDAP 76 (FLEX)
Cruise reportRRS John Murray JM4A/76 cruise report john_murray4a_76.pdf — access key 'C' (0.13 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRRS John Murray JM4A/76 cruise track — trk1551.html
Physical oceanography 
Surface measurements underway (T,S)
BathythermographQuantity: number of profiles = 7
Water bottle stationsQuantity: number of stations = 7
Subsurface temperature and salinity measurements
Optics (eg underwater light levels)
Chemical oceanography 
PhosphateQuantity: number of stations = 7
NitrateQuantity: number of stations = 7
NitriteQuantity: number of stations = 7
SilicateQuantity: number of stations = 7
Biology and fisheries 
Primary productivity
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 7
Particulate organic matter (inc POC, PON)
PhytoplanktonQuantity: number of stations = 7
ZooplanktonQuantity: number of samples = 19
Description: survey:population,biomass determination etc.
Routine standard measurements