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 |
