RRS Challenger CH126B
Cruise summary report
| Cruise Info. | |||||
| Ship name (ship code) | RRS Challenger (74CH) | ||||
| Cruise identifier | CH126B | ||||
| Cruise period | 1996-04-27 — 1996-05-12 | ||||
| Status | Completed | ||||
| Port of departure | Fairlie, United Kingdom | ||||
| Port of return | Fairlie, United Kingdom | ||||
| Purpose | Research | ||||
| Objectives | To study the biology and related sedimentology of the spring plankton bloom. Second part of two leg cruise. This was the second leg of the sixth cruise in a series of 7 cruises for the LOIS Shelf Edge Study (SES). The aim of SES is to study exchange between the Scottish continental shelf and adjacent waters of the North Atlantic Ocean. The main objective of leg B was to study the biology and related sedimentology of the spring phytoplankton bloom. Because of the threat posed by intensive commercial fishing, 3 mooring laid during leg A were recovered. Sediment cores were taken from water depths of 1000m to 2000m, and 3 groups of Argos-tracked drifters were laid. | ||||
| Chief scientist | Paul Tett (Napier University School of Life Sciences) | ||||
| Project | LOIS - SES | ||||
| Coordinating body | UK Natural Environment Research Council (NERC) | ||||
| Cruise report |  (1.72 MB) | ||||
| Ocean/sea areas | |||||
| General | North East Atlantic Ocean (limit 40W) | ||||
| Specific | NE Atlantic LOIS SES area 56-57N, 8 50'-10W, with excursions to 57 50'N, 8 30'W and 55 30'N, 7W | ||||
| Track charts |  | ||||
| Measurements | |||||
| Physical oceanography | |||||
| Surface measurements underway (T,S) | Quantity: activity duration in days = 15 Description: underway thermosalinograph, fluorometer,transmissometer,total solar irradiance | ||||
| Water bottle stations | Quantity: number of profiles = 157 Description: 3-12 water bottles per cast, mostly between 5m and seabed-5m | ||||
| CTD stations | Quantity: number of profiles = 157 Description: CTD with oxygen, transmittance, fluorescence and up/downwelling irradiance | ||||
| Transparency (eg transmissometer) | Quantity: activity duration in days = 15 Description: underway thermosalinograph, fluorometer,transmissometer,total solar irradiance | ||||
| Transparency (eg transmissometer) | Quantity: number of profiles = 157 Description: CTD with oxygen, transmittance, fluorescence and up/downwelling irradiance | ||||
| Optics (eg underwater light levels) | Quantity: number of deployments = 18 Description: optical measurements incl. downwards irradiance/upwards radiance in 7 wavebands to JGOFS/SeaWifs standards | ||||
| Optics (eg underwater light levels) | Quantity: number of profiles = 157 Description: CTD with oxygen, transmittance, fluorescence and up/downwelling irradiance | ||||
| Current meters | Quantity: number of stations = 3 | ||||
| Current profiler (eg ADCP) | Quantity: activity duration in days = 15 Description: Shipborne ADCP | ||||
| Chemical oceanography | |||||
| Oxygen | Quantity: number of profiles = 157 Description: CTD with oxygen, transmittance, fluorescence and up/downwelling irradiance | ||||
| Oxygen | Quantity: number of samples = 80 Description: measurements of dissolved oxygen/CTD sensor calibration | ||||
| Phosphate | Quantity: number of profiles = 157 | ||||
| Nitrate | Quantity: number of profiles = 157 | ||||
| Ammonia | Quantity: number of profiles = 157 | ||||
| Silicate | Quantity: number of profiles = 157 | ||||
| Other chemical oceanographic measurements | Quantity: number of deployments = 4 Description: cores - O2 demand/nutrient prod | ||||
| Other chemical oceanographic measurements | Quantity: number of samples = 200 Description: stored samples for iodine | ||||
| Contamination | |||||
| Suspended matter | Quantity: number of samples = 163 Description: samples for determination od SPM/transmissometer calibration | ||||
| Suspended matter | Quantity: number of experiments = 5 Description: settling velocity tube experiments | ||||
| Biology and fisheries | |||||
| Primary productivity | Quantity: number of experiments = 35 Description: photosynthesis-irradiance curves, phytoplankton samples stored for analysis | ||||
| Primary productivity | Quantity: number of experiments = 5 Description: simulated and actual insitu measurements of primary production with phytoplankton samples | ||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of experiments = 5 Description: simulated and actual insitu measurements of primary production with phytoplankton samples | ||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of profiles = 157 Description: CTD with oxygen, transmittance, fluorescence and up/downwelling irradiance | ||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of experiments = 5 Description: settling velocity tube experiments | ||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: activity duration in days = 15 Description: underway thermosalinograph, fluorometer,transmissometer,total solar irradiance | ||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 450 Description: frozen samples for chlorophyll analysis/fluorometer calibration | ||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of deployments = 18 Description: optical measurements incl. downwards irradiance/upwards radiance in 7 wavebands to JGOFS/SeaWifs standards | ||||
| Dissolved organic matter (inc DOC) | Quantity: number of samples = 70 Description: stored samples for DOC and DON | ||||
| Phytoplankton | Quantity: number of deployments = 18 Description: optical measurements incl. downwards irradiance/upwards radiance in 7 wavebands to JGOFS/SeaWifs standards | ||||
| Phytoplankton | Quantity: number of experiments = 5 Description: simulated and actual insitu measurements of primary production with phytoplankton samples | ||||
| Other biological/fisheries measurement | Quantity: number of deployments = 4 Description: sediment cores for fauna | ||||
| Other biological/fisheries measurement | Quantity: number of experiments = 11 Description: incubations for microplankton and bacterial respiration | ||||
| Meteorology | |||||
| Incident radiation | Quantity: activity duration in days = 15 Description: underway thermosalinograph, fluorometer,transmissometer,total solar irradiance | ||||
| Geology and geophysics | |||||
| Core - soft bottom | Quantity: number of deployments = 4 Description: multicore for sediment props. | ||||
| Bottom photography | Quantity: number of deployments = 5 Description: photography at multicore sites | ||||
| Moorings, landers, buoys | |||||
| Physical oceanography | |||||
| Subsurface temperature measurements | 56° 27' 0" N 9° 4' 0" W — Site S300 subsurface mooring with current meters, tranmissometer, thermistor chain recovered | ||||
| Transparency (eg transmissometer) | 56° 27' 0" N 9° 4' 0" W — Site S300 subsurface mooring with current meters, tranmissometer, thermistor chain recovered | ||||
| Current meters | 56° 27' 0" N 9° 4' 0" W — Site S300 subsurface mooring with current meters, tranmissometer, thermistor chain recovered | ||||
| Current meters | 56° 37' 0" N 9° 1' 0" W — Site N300 subsurface mooring with current meters recovered | ||||
| Current meters | 56° 27' 0" N 9° 3' 0" W — Site S200 U-mooring with current meters recovered after damage by other craft | ||||
| Surface drifters/drifting buoys | 56° 15' 0" N 9° 9' 0" W — deployment of 7 Argos drifters | ||||
| Surface drifters/drifting buoys | 56° 15' 0" N 9° 13' 0" W — deployment of 7 Argos drifters | ||||
| Surface drifters/drifting buoys | 56° 15' 0" N 9° 25' 59" W — deployment of 7 Argos drifters | ||||
| Data held at BODC | Get data | ||||
| Series/Profiles | |||||
| 593 Bottle station | Dissolved total and organic nitrogen concentrations in the water column Reference numbers Phosphate concentration parameters in the water column Salinity of the water column Temperature of the water column Vertical spatial coordinates Dissolved oxygen parameters in the water column Dissolved organic carbon concentration in the water column Silicate concentration parameters in the water column Ammonium and ammonia concentration parameters in water bodies Nitrate concentration parameters in the water column Phaeopigment concentrations in the water column Quality control flags Chlorophyll pigment concentrations in water bodies Dissolved total and organic nitrogen concentrations in the water column Reference numbers Phosphate concentration parameters in the water column Salinity of the water column Temperature of the water column Vertical spatial coordinates Dissolved oxygen parameters in the water column Dissolved organic carbon concentration in the water column Silicate concentration parameters in the water column Ammonium and ammonia concentration parameters in water bodies Nitrate concentration parameters in the water column Phaeopigment concentrations in the water column Quality control flags Chlorophyll pigment concentrations in water bodies
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| 156 CTD/STD cast | Transmittance and attenuance of the water column Salinity of the water column Temperature of the water column Vertical spatial coordinates Dissolved oxygen parameters in the water column Visible waveband radiance and irradiance measurements in the water column Density of the water column Chlorophyll pigment concentrations in water bodies Transmittance and attenuance of the water column Salinity of the water column Temperature of the water column Vertical spatial coordinates Dissolved oxygen parameters in the water column Visible waveband radiance and irradiance measurements in the water column Density of the water column Chlorophyll pigment concentrations in water bodies
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| 2 Pumped water sample | Horizontal spatial co-ordinates Date and time Phosphate concentration parameters in the water column Silicate concentration parameters in the water column Ammonium and ammonia concentration parameters in water bodies Nitrate concentration parameters in the water column Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies Horizontal spatial co-ordinates Date and time Phosphate concentration parameters in the water column Silicate concentration parameters in the water column Ammonium and ammonia concentration parameters in water bodies Nitrate concentration parameters in the water column Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies
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| Discrete samples | |||||
| 157 CTD frame plus rosette sampler | Dissolved total and organic nitrogen concentrations in the water column Transmittance and attenuance of the water column Phytoplankton taxonomic abundance in water bodies Phosphate concentration parameters in the water column Salinity of the water column Temperature of the water column Dissolved oxygen parameters in the water column Concentration of suspended particulate material in the water column Dissolved organic carbon concentration in the water column Silicate concentration parameters in the water column Visible waveband radiance and irradiance measurements in the water column Phytoplankton generic abundance in water bodies Density of the water column Ammonium and ammonia concentration parameters in water bodies Nitrate concentration parameters in the water column Phaeopigment concentrations in the water column Metadata parameters Primary production in the water column Chlorophyll pigment concentrations in water bodies | ||||
| 21 Drifting Buoy | |||||
| 13 Multicorer | Concentration of organic matter in sediments Other fluxes between the bed and the water column Stable isotopes in sediment Sediment water content, porosity and surface area Concentration of inorganic sulphur species in sediment | ||||
| 29 Profiling radiometer | Visible waveband radiance and irradiance measurements in the atmosphere Temperature of the water column Visible waveband radiance and irradiance measurements in the water column | ||||
| 166 Sample taken from ship's non-toxic supply | Concentration of inorganic halogens in water bodies Phosphate concentration parameters in the water column Salinity of the water column Silicate concentration parameters in the water column Ammonium and ammonia concentration parameters in water bodies Nitrate concentration parameters in the water column Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies | ||||
| 5 Settling velocity tube | Suspended particulate material setting velocity parameters Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies | ||||
| 4137 Shipborne Acoustic Doppler Current Profile | |||||
| 5 Underwater camera system |
