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 | Quantity: activity duration in days = 30 Description: OSCR II (HF radar) current measurements from coastal based station |
| Other physical oceanographic measurements | Description: Aircraft, colour photos and Corsair line spectrometer, data grid over Somme |
| 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 stations = 57 Description: Multisampler samples for SPM |
| Suspended matter | Quantity: number of deployments = 1 Description: 2x'SeaStar' pump systems, surface |
| 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 = 57 Description: Multisample samples for chlorophyll |
| 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 = 64 Description: Chelsea fluorometer on CTD |
| 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° 30' 0" N 1° 55' 59" W — laid 1yr mooring, 2 Aanderaa RCM8s, with T,S and P sensors, 10m+2m from seabed |
| 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 |
