Cruise summary report
Cruise Info. | |
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Ship name (ship code) | FRV Explorer (74EX) |
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Cruise identifier | 4/71 |
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Cruise period | 1971-07-11 — 1971-08-06 |
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Status | Completed |
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Port of departure | Aberdeen, United Kingdom |
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Purpose | Research |
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Objectives | 1) To collect water, plankton, fish, benthos, and sediment samples for heavy metal analysis
2) To make continuous surveys of temperature, salinity, nitrate and chlorophyll concentrations
3) To measure currents in the sea area from Arran and the Ayrshire coast using current meters and parachute drogues
4) To sample and examine bottom sediments in the vicinity of Garrochhead using underwater TV
5) To collect samples of seawater at a number of fixed stations in the Clyde area for salinity, temperature, nutrient and dissolved oxygen analysis
6) Uplift and relay moored current meter at Collieston
Owing to a faulty navigation light, the Collieston mooring was not re-laid. Additional sampling work was done:
1) Current measurement using parachute drogues in the area of the sill at the entrance to the Clyde
2) Collection of Flatfish at several beach areas between Ardrossan and Troon using FRV ''Sprat''
3) Inshore survey of the nitrate content of waters in the area of the nylon work's pipeline
4) A number of hydrographic stations during passage back to Aberdeen to delineate area of mixing between coastal and oceanic waters |
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Chief scientist | Graham Topping (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory) |
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Cruise report | (0.08 MB) |
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Ocean/sea areas | |
General | North East Atlantic Ocean (limit 40W) |
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Specific | Garrochhead, Arran and the Ayrshire coast, Clyde, areas between Ardrossan and Troon, Aberdeen Banks |
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Measurements | |
Physical oceanography | |
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Bathythermograph | Quantity: number of profiles = 3 Description: mechanical |
Water bottle stations | Quantity: number of stations = 103 Description: 8 top & bottom only |
Current meters | Description: 3d |
Other physical oceanographic measurements | Quantity: 20 |
Chemical oceanography | |
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Oxygen | Quantity: 35 |
Phosphate | Quantity: 34 |
Nitrate | Quantity: 76 |
Biology and fisheries | |
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Primary productivity | Quantity: 21 |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: 50 |
Other biological/fisheries measurement | Quantity: 6 Description: biological oxygen demand |
Geology and geophysics | |
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Dredge | Quantity: number of deployments = 16 |
Bottom photography | Quantity: 8 |