RRS Challenger CH27

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH27
Cruise period1988-04-04 — 1988-04-25
ObjectivesBiological cruise. Leg 1: 31 Mar - 5 Apr; Leg 2: 5-24 Apr.
Chief scientistE Malcolm S Woodward (Plymouth Marine Laboratory)
Ocean/sea areas 
GeneralEnglish Channel
North Sea
SpecificEnglish Channel; North Sea
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 5186
Water bottle stationsQuantity: number of stations = 22
Description: NIO bottle drops 86 S surface
CTD stationsQuantity: number of stations = 6
Subsurface temperature and salinity measurementsQuantity: track kilometres = 3334
Optics (eg underwater light levels)Description: 1100nm
Chemical oceanography 
PhosphateDescription: 2800nm
NitrateDescription: 2800nm
NitriteDescription: 2800nm
SilicateDescription: 2800nm
Other contaminant measurements
Biology and fisheries 
Primary productivityQuantity: number of measurements = 72
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 93
Particulate organic matter (inc POC, PON)Quantity: number of samples = 186
PhytoplanktonQuantity: number of samples = 93
Description: distribution,biomass determination,energy transfers