RRS John Murray JM16/76 (B/10/76)
Cruise summary report
Cruise Info. | |
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Ship name (ship code) | RRS John Murray (74MJ) |
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Cruise identifier | JM16/76 (B/10/76) |
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Cruise period | 1976-11-16 — 1976-11-24 |
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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 | Bristol Channel survey:
1) To study the geochemistry of the seawater sediment interface
2) To investigate the critical chemical processes which occur at this interface in relation to the water chemistry of the estuarine systems
3) To compare the chemistry at this interface in an area of active disposition and unstable areas. |
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Chief scientist | Peter G Watson (Institute of Marine Environmental Research, Plymouth) |
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Cruise report | (0.13 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) | Quantity: number of stations = 6 Description: S only |
Water bottle stations | Quantity: number of stations = 6 |
CTD stations | Quantity: number of stations = 6 |
Chemical oceanography | |
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Oxygen | Quantity: number of stations = 6 |
Other dissolved gases | Quantity: number of stations = 5 |
Phosphate | Quantity: number of stations = 6 |
Nitrate | |
Alkalinity | Quantity: number of stations = 6 |
pH | Quantity: number of stations = 6 |
Trace elements | Quantity: number of stations = 6 |
Radioactivity | Quantity: number of samples = 2 |
Contamination | |
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Suspended matter | Quantity: number of stations = 6 |
Trace metals | Quantity: number of stations = 6 |
Biology and fisheries | |
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Zoobenthos | Quantity: number of samples = 1 Description: survey:population,energy transfers,biomass determination etc. |
Geology and geophysics | |
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Dredge | Quantity: number of deployments = 2 |
Grab | Quantity: number of samples = 1 |
Core - soft bottom | Quantity: number of cores = 27 Description: 6 chemical analysis of sediments |
In-situ seafloor measurement/sampling | Quantity: number of deployments = 1 Description: radioactivity msmnts. |