Cruise Info. | |
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Ship name (ship code) | RRS John Murray (74MJ) |
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Cruise identifier | JM5/78 (C/3/78) |
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Cruise period | 1978-05-09 — 1978-05-24 |
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Status | Completed |
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Port of departure | Barry, United Kingdom |
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Port of return | Barry, United Kingdom |
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Purpose | Research |
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Objectives | 1. To measure levels of nutrients, chlorophyll, total suspended matter, organic matter and the zooplankton and phytoplankton populations.
2. To characterise the hydrographic conditions at the sites.
3. To measure the feeding rates and development times of two species of copepods at the two sites.
4. To measure uptake and release of nutrients by micro-organisms.
5. To measure the release of nutrients by zooplankton. |
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Chief scientist | Bob Williams (Institute of Marine Environmental Research, Plymouth) |
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Cruise report | (0.48 MB) |
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Ocean/sea areas | |
General | Inner Seas off the West Coast of Scotland Bristol Channel |
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Track charts | |
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Measurements | |
Physical oceanography | |
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Surface measurements underway (T,S) | |
Water bottle stations | Quantity: number of stations = 20 |
CTD stations | Quantity: number of stations = 31 |
Chemical oceanography | |
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Phosphate | Quantity: number of cores = 35 |
Total - P | Quantity: number of cores = 35 |
Nitrate | Quantity: number of cores = 35 |
Nitrite | Quantity: number of cores = 35 |
Silicate | Quantity: number of cores = 35 |
Contamination | |
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Suspended matter | Quantity: number of cores = 240 |
Biology and fisheries | |
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Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of cores = 200 |
Particulate organic matter (inc POC, PON) | Quantity: number of cores = 200 |
Dissolved organic matter (inc DOC) | Quantity: number of cores = 200 |
Phytoplankton | Quantity: number of cores = 200 |
Zooplankton | Quantity: number of cores = 59 Description: biomass, monitoring, distribution etc |
Seston | Quantity: number of cores = 200 |
Meteorology | |
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Routine standard measurements | |
Data held at BODC | |
Discrete samples | |
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458 General station with STD/bottles/additional instruments | Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies Nitrite concentration parameters in the water column Salinity of the water column Phosphate concentration parameters in the water column Temperature of the water column Dissolved organic carbon concentration in the water column Silicate concentration parameters in the water column Nitrate concentration parameters in the water column
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