Cruise Info. | |
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Ship name (ship code) | RRS John Murray (74MJ) |
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Cruise identifier | JM1/80 (B/2/80) |
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Cruise period | 1980-03-13 — 1980-03-24 |
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Status | Completed |
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Port of departure | Plymouth, United Kingdom |
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Port of return | Barry, United Kingdom |
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Purpose | Research |
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Objectives | Bristol Channel survey with the following objectives:
1) Advective and diffusive transport of nutrients from local run off, Celtic Sea/ Bristol Channel water and underlying sedimentary pore- waters
2) Nutrient demand from primary producers using double isotope labelling techniques 15N and 14C
3) Nutrient excretion by the total zooplankton system in terms of four size fractioned subpopulations
4) Bacterial nitrification and dentrification processes
5) To continue a series of monitoring surveys of the Bristol Channel and Severn Estuary ecosystem. |
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Chief scientist | R Fauzi C Mantoura (Institute of Marine Environmental Research, Plymouth) |
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Cruise report | (0.14 MB) |
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Ocean/sea areas | |
General | Bristol Channel |
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Track charts | |
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Measurements | |
Physical oceanography | |
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Surface measurements underway (T,S) | Description: Continuous recording 260 n.m. approx. |
Chemical oceanography | |
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Phosphate | |
Nitrate | |
Nitrite | |
Ammonia | Quantity: number of stations = 30 |
Silicate | |
Contamination | |
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Suspended matter | Description: Continuous recording 260 n.m. approx. |
Biology and fisheries | |
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Primary productivity | Quantity: number of stations = 4 |
Phytoplankton pigs (eg chlorophyll, fluorescence) | |
Particulate organic matter (inc POC, PON) | Quantity: number of stations = 60 |
Dissolved organic matter (inc DOC) | Quantity: number of stations = 30 |
Biochemical measurements (eg lipids, amino acids) | Quantity: number of stations = 30 |
Phytoplankton | Quantity: number of stations = 15 |
Zooplankton | Quantity: number of stations = 15 |
Pelagic bacteria/micro-organisms | Quantity: number of stations = 15 |
Zoobenthos | Quantity: number of stations = 1 Description: survey:energy transfers,distribution,physiology |
Geology and geophysics | |
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Core - soft bottom | Quantity: number of cores = 20 Description: chemical analysis of sediments |
Data held at BODC | |
Discrete samples | |
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173 General station with STD/bottles/additional instruments | Nitrite concentration parameters in the water column Salinity of the water column Phosphate concentration parameters in the water column Temperature of the water column Concentration of suspended particulate material 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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