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

Cruise inventory

RRS John Murray JM7/68

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM7/68
Cruise period1968-06-13 — 1968-06-19
Port of departureLiverpool, United Kingdom
Port of returnLiverpool, United Kingdom
Objectives1. Carry out diffusion experients.
2.Observe environmental conditions in which diffusion occurs, in particular the temperature and salinity distribution and currents.
3. Study the distribution of pigments in phytoplankton in various conditions.
4. Obtain water samples from a series of stations for trace element analysis
Chief scientistKenneth F Bowden (University of Liverpool Department of Oceanography)
Cruise reportRRS John Murray JM7/68 cruise report john_murray7_68.pdf — access key 'C' (0.22 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificIrish Sea
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of stations = 4
Subsurface temperature and salinity measurementsQuantity: number of stations = 4
Current metersQuantity: number of deployments = 1
Description: Roberts buoy with Plessey current meter
Current metersQuantity: number of recoveries = 1
Description: Roberts buoy with Plessey current meter
Current profiler (eg ADCP)Quantity: number of stations = 2
Description: DRCM, measurements every 30 minutes
Other physical oceanographic measurementsQuantity: number of stations = 1
Description: water sampling
Chemical oceanography 
Other chemical oceanographic measurementsQuantity: number of experiments = 6
Description: dye diffusion
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 4
Description: determination