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RRS Challenger CH4B/76
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS Challenger (74CH) |
Cruise identifier | CH4B/76 |
Cruise period | 1976-03-18 — 1976-03-23 |
Status | Completed |
Port of departure | Aberdeen, United Kingdom |
Port of return | Aberdeen, United Kingdom |
Purpose | Research |
Objectives | This cruise aimed to undertake UOR (including calibration CTD profiles) and CPR surveying to determine pre-bloom conditions in the FLEX survey box (58.5-59.5N, 0-2E). Despite poor weather and a medical emergency curtailing the cruise an adequate picture of pre-bloom conditions was obtained. |
Chief scientist | Robert H Bruce (Institute of Marine Environmental Research, Plymouth) |
Project | JONSDAP 76 |
Cruise report | (0.25 MB) |
Ocean/sea areas | |
General | North Sea |
Track charts | |
Measurements | |
Physical oceanography | |
Surface measurements underway (T,S) | Quantity: number of measurements = 500 |
Water bottle stations | Quantity: number of stations = 5 |
CTD stations | Quantity: number of stations = 5 |
Subsurface temperature and salinity measurements | Quantity: number of measurements = 400 |
Transparency (eg transmissometer) | Quantity: number of stations = 5 |
Chemical oceanography | |
Phosphate | Quantity: number of stations = 5 |
Nitrate | Quantity: number of stations = 5 |
Nitrite | Quantity: number of stations = 5 |
Silicate | Quantity: number of stations = 5 |
Biology and fisheries | |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 5 |
Phytoplankton | Quantity: number of stations = 5 |
Zooplankton | Quantity: track kilometres = 740.8 Description: cont. record. survey:distribution,population,energy transfers etc. |
Meteorology | |
Routine standard measurements | Quantity: number of observations = 15 |