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RRS Challenger CH23A
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS Challenger (74CH) |
Cruise identifier | CH23A |
Cruise period | 1988-01-06 — 1988-01-27 |
Status | Completed |
Port of departure | Aberdeen, United Kingdom |
Port of return | Aberdeen, United Kingdom |
Purpose | Research |
Objectives | 1. To carry out a survey of the distribution of herring larvae, plankton and hydrographic parameters in the North Sea.
2. To perform a series of intensive studies of the vertical distribution of herring larvae. |
Chief scientist | Mike R Heath (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory) |
Cruise report | (0.12 MB) |
Ocean/sea areas | |
General | North Sea |
Track charts | |
Measurements | |
Physical oceanography | |
CTD stations | Quantity: number of stations = 11 |
Subsurface temperature and salinity measurements | |
Optics (eg underwater light levels) | |
Current profiler (eg ADCP) | Description: all trip |
Chemical oceanography | |
Phosphate | Quantity: number of stations = 11 |
Nitrate | Quantity: number of stations = 11 |
Biology and fisheries | |
Phytoplankton | |
Zooplankton | |
Eggs and larvae | Description: routine sampling of herring larvae carried out using a 5 metre squared Methot-Isaacs Kidd net. |