RRS Challenger CH27

Cruise summary report

Cruise Info.
Ship name (ship code)	RRS Challenger (74CH)
Cruise identifier	CH27
Cruise period	1988-04-04 — 1988-04-25
Status	Completed
Objectives	Biological cruise. Leg 1: 31 Mar - 5 Apr; Leg 2: 5-24 Apr.
Chief scientist	E Malcolm S Woodward (Plymouth Marine Laboratory)
Ocean/sea areas
General	English Channel North Sea
Specific	English Channel; North Sea
Measurements
Physical oceanography
Surface measurements underway (T,S)	Quantity: track kilometres = 5186
Water bottle stations	Quantity: number of stations = 22 Description: NIO bottle drops 86 S surface
CTD stations	Quantity: number of stations = 6
Subsurface temperature and salinity measurements	Quantity: track kilometres = 3334
Optics (eg underwater light levels)	Description: 1100nm
Chemical oceanography
Phosphate	Description: 2800nm
Nitrate	Description: 2800nm
Nitrite	Description: 2800nm
Silicate	Description: 2800nm
Contamination
Other contaminant measurements
Biology and fisheries
Primary productivity	Quantity: 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
Phytoplankton	Quantity: number of samples = 93 Description: distribution,biomass determination,energy transfers