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RRS Challenger CH83
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Challenger (74CH) |
| Cruise identifier | CH83 |
| Cruise period | 1991-08-04 — 1991-08-19 |
| Status | Completed |
| Port of departure | Great Yarmouth, United Kingdom |
| Port of return | Dundee, United Kingdom |
| Purpose | Research |
| Objectives | To measure the concentrations of major plant nutrients |
| Chief scientist | Nicholas J P Owens (Plymouth Marine Laboratory) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | North Sea |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: track kilometres = 7600 Description: UOR |
| Water bottle stations | Quantity: number of profiles = 61 |
| CTD stations | Quantity: number of profiles = 61 |
| Subsurface temperature and salinity measurements | Quantity: track kilometres = 7600 Description: UOR |
| Transparency (eg transmissometer) | Quantity: track kilometres = 7600 Description: UOR |
| Optics (eg underwater light levels) | Quantity: track kilometres = 7600 Description: UOR |
| Chemical oceanography | |
| Phosphate | Quantity: track kilometres = 7600 Description: UOR |
| Nitrate | Quantity: track kilometres = 7600 Description: UOR |
| Nitrite | Quantity: track kilometres = 7600 Description: UOR |
| Ammonia | Quantity: track kilometres = 7600 Description: UOR |
| Silicate | Quantity: track kilometres = 7600 Description: UOR |
| Biology and fisheries | |
| Primary productivity | Quantity: number of samples = 133 Description: surface samples collected from pumped water |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 133 Description: surface samples collected from pumped water |
| Particulate organic matter (inc POC, PON) | Quantity: number of samples = 133 Description: surface samples collected from pumped water |
| Phytoplankton | Quantity: number of samples = 133 Description: surface samples collected from pumped water |
| Pelagic bacteria/micro-organisms | Quantity: number of samples = 133 Description: surface samples collected from pumped water |
| Other biological/fisheries measurement | Quantity: number of samples = 133 Description: surface samples collected from pumped water |
| Data held at BODC | |
| Discrete samples | |
| 59 CTD frame plus rosette sampler | Transmittance and attenuance of the water column Salinity of the water column Dissolved oxygen parameters in the water column Temperature of the water column Visible waveband radiance and irradiance measurements in the water column Density of the water column Raw light meter output Raw fluorometer output |
