Cruise Info. | |
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Ship name (ship code) | RRS John Murray (74MJ) |
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Cruise identifier | JM2/79 (B/1/79, C/1/79) |
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Cruise period | 1979-01-11 — 1979-01-22 |
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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 | Surveys in the Bristol Channel and Carmarthen Bay with the objectives:
1a) To measure levels of nutrients, chlorphyll, total suspended matter, organic matter and the zooplankton and phytoplankton populations.
1b) To characterise the hydrographic conditions at the two sites.
1c) To measure the feeding rates and development time of copepod at 2 sites
2) To continue a series of cruises to monitor the performance of the Bristol Channel area to update the validation of the ecosystem model GEMBASE. |
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Chief scientist | Bob Williams (Institute of Marine Environmental Research, Plymouth) |
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Cruise report | (0.22 MB) |
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Ocean/sea areas | |
General | Irish Sea and St. George's Channel Bristol Channel |
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Specific | Carmarthen Bay |
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Track charts | (0.02 MB) |
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Measurements | |
Physical oceanography | |
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Surface measurements underway (T,S) | Description: see cruise tracks |
Chemical oceanography | |
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Phosphate | Quantity: number of stations = 125 |
Total - P | Quantity: number of stations = 125 |
Nitrate | Quantity: number of stations = 125 |
Nitrite | Quantity: number of stations = 125 |
Silicate | Quantity: number of stations = 125 |
Contamination | |
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Suspended matter | Quantity: number of stations = 58 |
Biology and fisheries | |
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Primary productivity | Quantity: number of stations = 1 |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 125 |
Particulate organic matter (inc POC, PON) | Quantity: number of stations = 88 |
Phytoplankton | Quantity: number of stations = 58 |
Zooplankton | Quantity: number of stations = 44 Description: identification,distribution,biomass,monitoring |
Seston | Quantity: number of stations = 125 |
Data held at BODC | |
Discrete samples | |
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274 General station with STD/bottles/additional instruments | Nitrite concentration parameters in the water column Temperature of the water column Phosphate concentration parameters in the water column Salinity of the water column Concentration of suspended particulate material in 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 Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies
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