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RRS Challenger CH91
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS Challenger (74CH) |
Cruise identifier | CH91 |
Cruise period | 1992-05-05 — 1992-05-20 |
Status | Completed |
Port of departure | Barry, United Kingdom |
Port of return | Plymouth, United Kingdom |
Purpose | Research |
Objectives | Study of fish spawning area |
Chief scientist | Ian Joint (Plymouth Marine Laboratory) |
Ocean/sea areas | |
General | Celtic Sea |
Specific | North east Atlantic, Little Sole Bank |
Track charts | |
Measurements | |
Physical oceanography | |
Surface measurements underway (T,S) | Quantity: number of surveys = 13 Description: 6hr transects |
CTD stations | Quantity: number of profiles = 35 Description: CTD casts to within 20m of bottom |
Transparency (eg transmissometer) | Quantity: number of profiles = 35 Description: transmissometry and light (PAR) attached to CTD |
Transparency (eg transmissometer) | Quantity: number of surveys = 13 Description: surface water for transmissometery, 6hr transects Little Sole Bank |
Chemical oceanography | |
Phosphate | Quantity: number of surveys = 13 Description: surface water, 6hr transects across Little Sole Bank |
Nitrate | Quantity: number of surveys = 13 Description: surface water, 6hr transects of Little Sole Bank |
Nitrite | Quantity: number of surveys = 13 Description: surface water, 6hr transects across Little Sole Bank |
Silicate | Quantity: number of surveys = 13 Description: surface water, 6hr transects across Little Sole Bank |
Biology and fisheries | |
Primary productivity | Quantity: number of experiments = 10 Description: In situ primary productivity |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of profiles = 35 Description: Fluorescence, attached to CTD |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of surveys = 13 Description: surface water for fluorescence 6hr transects over Little Sole Bank |
Zooplankton | Quantity: number of samples = 1900 Description: Copepod egg productions, gut fluorescence measurements |
Pelagic bacteria/micro-organisms | Quantity: number of experiments = 10 Description: Determination of bacterial productivity |
Moorings, landers, buoys | |
Physical oceanography | |
Surface drifters/drifting buoys | 48° 36' 0" N 9° 25' 59" W — 4 ARGOS drifting buoys deployed 8 May, recovered 18 May |
Data held at BODC | |
Discrete samples | |
36 CTD frame plus rosette sampler | Bacterial production in the water column Transmittance and attenuance of the water column Nitrite concentration parameters in the water column Salinity of the water column Phosphate concentration parameters in the water column Temperature of the water column Visible waveband radiance and irradiance measurements in the water column Silicate concentration parameters in the water column Density of the water column Nitrate concentration parameters in the water column Phaeopigment concentrations in the water column Primary production in the water column Chlorophyll pigment concentrations in water bodies |