RRS John Murray JM3/81

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS John Murray (74MJ)
Cruise identifierJM3/81
Cruise period1981-03-31 — 1981-04-09
Port of departurePlymouth, United Kingdom
Port of returnBarry, United Kingdom
ObjectivesTo survey the thermal structure which occurs in the English Channel along the South coast of England, during the late winter/early spring, and to detect any associated structure in the biological productivity if it existed.
Chief scientistIan S Robinson (University of Southampton Department of Oceanography)
Cruise reportRRS John Murray JM3/81 cruise report john_murray3_81.pdf (0.17 MB) 
Ocean/sea areas 
GeneralEnglish Channel
Irish Sea and St. George's Channel
Bay of Biscay
Track chartsRRS John Murray JM3/81 cruise track — trk2729a.html RRS John Murray JM3/81 cruise track — trk2729b.html RRS John Murray JM3/81 cruise track — trk2731.html
Physical oceanography 
Surface measurements underway (T,S)
CTD stationsQuantity: number of stations = 75
Current metersQuantity: number of stations = 2
Description: 3 c.m.on each of 2 moorings;sampling interval:1 min.;3,5 days
Chemical oceanography 
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)
Particulate organic matter (inc POC, PON)
Dissolved organic matter (inc DOC)
Geology and geophysics 
GrabQuantity: number of samples = 12