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RRS Challenger CH55
Cruise summary report
Cruise Info. | |||||
Ship name (ship code) | RRS Challenger (74CH) | ||||
Cruise identifier | CH55 | ||||
Cruise period | 1989-06-24 — 1989-07-07 | ||||
Status | Completed | ||||
Port of departure | Great Yarmouth, United Kingdom | ||||
Port of return | Great Yarmouth, United Kingdom | ||||
Purpose | Research | ||||
Objectives | To determine the seasonal cycle of all the major oceanographic variables in the North Sea.
This info will form a unique data set on seasonal changes in an archetypal shelf sea which will be used as a basis for initialising and testing models of vertical exchange, horizontal transport and the seasonal cycle of production and nutrient regeneration. These models represent essential intermediate goals in the long term development of skillful models describing the fate of pollutants which are released into the North Sea. | ||||
Chief scientist | John H Simpson (University of Wales, Bangor School of Ocean Sciences) | ||||
Project | North Sea Project | ||||
Coordinating body | NERC | ||||
Cruise report | (0.38 MB) | ||||
Ocean/sea areas | |||||
General | North Sea | ||||
Specific | North Sea | ||||
Track charts | (0.02 MB) | ||||
Measurements | |||||
Physical oceanography | |||||
Surface measurements underway (T,S) | Quantity: track kilometres = 1417 Description: continuous underway temperature, salinity, attenuence,bathymetry,chlorophyll,dissolved oxygen,light | ||||
Water bottle stations | Quantity: number of stations = 126 | ||||
CTD stations | Quantity: number of stations = 123 | ||||
Transparency (eg transmissometer) | Quantity: track kilometres = 1417 Description: continuous underway temperature, salinity, attenuence,bathymetry,chlorophyll,dissolved oxygen,light | ||||
Transparency (eg transmissometer) | Quantity: number of stations = 123 | ||||
Optics (eg underwater light levels) | Quantity: number of stations = 123 | ||||
Current meters | Quantity: number of stations = 4 Description: 9 cms recovered & redeployed | ||||
Current profiler (eg ADCP) | Quantity: track kilometres = 1417 Description: shipborne ADCP profiles | ||||
Chemical oceanography | |||||
Oxygen | Quantity: number of stations = 123 | ||||
Oxygen | Quantity: track kilometres = 1417 Description: continuous underway temperature, salinity, attenuence,bathymetry,chlorophyll,dissolved oxygen,light | ||||
Oxygen | Quantity: number of stations = 26 Description: dissolved oxygen | ||||
Phosphate | Quantity: number of stations = 126 | ||||
Nitrate | Quantity: number of stations = 126 | ||||
Nitrite | Quantity: number of stations = 126 | ||||
Ammonia | Quantity: number of stations = 126 | ||||
Silicate | Quantity: number of stations = 126 | ||||
Other chemical oceanographic measurements | Quantity: number of stations = 120 Description: diss./particulate DMSp,DMS,total DMSp & 20 other halocarbons | ||||
Contamination | |||||
Suspended matter | Quantity: number of stations = 126 Description: suspended sediment to calibrate transmissometer | ||||
Biology and fisheries | |||||
Primary productivity | Quantity: number of experiments = 10 Description: primary production experiments | ||||
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 123 | ||||
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: track kilometres = 1417 Description: continuous underway temperature, salinity, attenuence,bathymetry,chlorophyll,dissolved oxygen,light | ||||
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 375 Description: chl. samples and phaeopigment (no. of bottles) | ||||
Phytoplankton | Quantity: number of samples = 60 | ||||
Zooplankton | Quantity: number of stations = 70 | ||||
Meteorology | |||||
Incident radiation | Quantity: track kilometres = 1417 Description: continuous underway temperature, salinity, attenuence,bathymetry,chlorophyll,dissolved oxygen,light | ||||
Atmospheric chemistry | Quantity: activity duration in hours = 104 Description: 90h marine aerosols,cascade impactor samples,14h marine aerosols,org./inorg. particles | ||||
Atmospheric chemistry | Quantity: number of samples = 16 Description: 12 large aerosols, 4 rainfall | ||||
Geology and geophysics | |||||
Single-beam echosounding | Quantity: track kilometres = 1417 Description: continuous underway temperature, salinity, attenuence,bathymetry,chlorophyll,dissolved oxygen,light | ||||
Moorings, landers, buoys | |||||
Physical oceanography | |||||
Current meters | 52° 36' 54" N 3° 46' 5" E — Mooring F, 2 current meters recovered and redeployed | ||||
Current meters | 52° 41' 6" N 2° 25' 11" E — Mooring E, 2 current meters recovered and redeployed | ||||
Current meters | 54° 20' 24" N 0° 23' 35" E — Mooring C, Sea floor ADCP and current meter recovered and redeployed | ||||
Current meters | 55° 29' 53" N 5° 30' 29" E — Mooring B, 4 current meters recovered and redeployed | ||||
Current profiler (eg ADCP) | 55° 30' 0" N 0° 54' 6" E — Mooring A, ADCP and thermistor chain recovered and redeployed | ||||
Current profiler (eg ADCP) | 54° 20' 24" N 0° 23' 35" E — Mooring C, Sea floor ADCP and current meter recovered and redeployed | ||||
Current profiler (eg ADCP) | 53° 30' 0" N 3° 0' 17" E — Mooring D, Sea floor ADCP recovered and redeployed | ||||
Instrumented wave measurements | 53° 30' 6" N 3° 0' 35" E — Mooring D, thermistor chain recovered and redeployed | ||||
Instrumented wave measurements | 55° 30' 0" N 0° 54' 6" E — Mooring A, ADCP and thermistor chain recovered and redeployed | ||||
Instrumented wave measurements | 55° 30' 0" N 5° 29' 48" E — Mooring B, thermistor chain recovered and redeployed | ||||
Instrumented wave measurements | 54° 20' 17" N 0° 23' 48" E — Mooring C, thermistor chain recovered and redeployed | ||||
Data held at BODC | Get data | ||||
Series/Profiles | |||||
372 Bottle station | Reference numbers Nitrite concentration parameters in the water column Vertical spatial coordinates 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 Quality control flags Chlorophyll pigment concentrations in water bodies Reference numbers Nitrite concentration parameters in the water column Vertical spatial coordinates 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 Quality control flags Chlorophyll pigment concentrations in water bodies
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123 CTD/STD cast | Transmittance and attenuance of the water column Dissolved oxygen parameters in the water column Temperature of the water column Vertical spatial coordinates Salinity of the water column Concentration of suspended particulate material 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 Dissolved oxygen parameters in the water column Temperature of the water column Vertical spatial coordinates Salinity of the water column Concentration of suspended particulate material 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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Discrete samples | |||||
20 Bulk filtered air sample | |||||
127 CTD frame plus rosette sampler | Transmittance and attenuance of the water column Organosulphur and organoselenium species concentration parameters in water bodies Nitrite concentration parameters in the water column Temperature of the water column Dissolved oxygen parameters in the water column Phytoplankton taxonomic abundance in water bodies Phosphate concentration parameters in the water column Salinity of the water column Concentration of suspended particulate material in the water column Silicate concentration parameters in the water column Visible waveband radiance and irradiance measurements in the water column Other halocarbon concentrations in water bodies Density of the water column Ammonium and ammonia concentration parameters in water bodies Microzooplankton taxonomic abundance in water bodies Phytoplankton generic abundance in water bodies Metadata parameters Microzooplankton generic abundance in water bodies Nitrate concentration parameters in the water column Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies Primary production in the water column | ||||
1 Cascade impactor atmospheric sampler | |||||
4 Rain water collector | |||||
30 Sample taken from ship's non-toxic supply | Dissolved oxygen parameters in the water column | ||||
70 Unspecified zooplankton net or nets |