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- 3750
RRS Challenger CH90
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS Challenger (74CH) |
Cruise identifier | CH90 |
Cruise period | 1992-03-20 — 1992-03-31 |
Status | Completed |
Port of departure | Barry, United Kingdom |
Port of return | Barry, United Kingdom |
Purpose | Research |
Objectives | Biogeochemical study of the flux of material and water. Part of the Anglo-French programme FLUXMANCHE |
Chief scientist | Simon Boxall (University of Southampton Department of Oceanography) |
Project | FLUXMANCHE |
Coordinating body | FLUXMANCHE (for UK, University of Southampton) |
Ocean/sea areas | |
General | English Channel |
Specific | Eastern English Channel and Somme region |
Track charts | |
Measurements | |
Physical oceanography | |
Surface measurements underway (T,S) | Quantity: track kilometres = 3000 Description: Pumped water instrumentation plus meteorological package |
Water bottle stations | Quantity: number of stations = 57 Description: General Oceanics Multisampler with samples at surface and near bottom |
CTD stations | Quantity: number of stations = 64 Description: Neil Brown Mk III CTD |
Transparency (eg transmissometer) | Quantity: number of stations = 64 Description: SeaTech transmissometer on CTD |
Transparency (eg transmissometer) | Quantity: track kilometres = 3000 Description: Pumped water instrumentation plus meteorological package |
Optics (eg underwater light levels) | Description: spectra from sea surface using Spectron radiometer, uplooking collector |
Optics (eg underwater light levels) | Quantity: number of stations = 64 Description: Up/downwelling light sensors on CTD |
Current meters | Quantity: number of stations = 2 Description: 4 cms deployed |
Current profiler (eg ADCP) | Quantity: track kilometres = 3000 Description: Shipborne RDI ADCP |
Other physical oceanographic measurements | Description: Aircraft, colour photos and Corsair line spectrometer, data grid over Somme |
Other physical oceanographic measurements | Quantity: activity duration in days = 30 Description: OSCR II (HF radar) current measurements from coastal based station |
Chemical oceanography | |
Oxygen | Quantity: number of stations = 64 Description: Oxygen sensor on CTD |
Phosphate | Quantity: number of stations = 57 Description: surface & some near-bottom |
Nitrate | Quantity: number of stations = 57 Description: surface and some near-bottom samples |
Nitrite | Quantity: number of stations = 57 Description: surface and some near-bottom samples |
Ammonia | Quantity: number of stations = 57 Description: surface and some near-bottom samples |
Silicate | Quantity: number of surveys = 57 Description: surface and some near-bottom samples |
Contamination | |
Suspended matter | Quantity: number of deployments = 1 Description: 2x'SeaStar' pump systems, surface |
Suspended matter | Quantity: number of stations = 57 Description: Multisampler samples for SPM |
Trace metals | Quantity: number of stations = 57 Description: surface & some near-bottom (Al,Cd,Co,Cu,Mn,Ni,Pb,Zn), particulate & dissolved |
Other dissolved substances | Quantity: number of stations = 35 Description: surface and bottom samples for PCB and pesticides |
Biology and fisheries | |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 64 Description: Chelsea fluorometer on CTD |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: track kilometres = 3000 Description: Pumped water instrumentation plus meteorological package |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 57 Description: Multisample samples for chlorophyll |
Meteorology | |
Occasional standard measurements | Quantity: number of observations = 64 Description: Met. observations at each CTD station |
Routine standard measurements | Quantity: track kilometres = 3000 Description: Pumped water instrumentation plus meteorological package |
Geology and geophysics | |
Single-beam echosounding | Quantity: track kilometres = 3000 Description: underway P.E.S. bathymetry |
Moorings, landers, buoys | |
Physical oceanography | |
Current meters | 50° 4' 59" N 1° 55' 59" W — laid 1yr mooring, 2 Aanderaa RCM8s, with T,S and P sensors, 10m+2m from seabed |
Current meters | 50° 30' 0" N 1° 55' 59" W — laid 1yr mooring, 2 Aanderaa RCM8s, with T,S and P sensors, 10m+2m from seabed |