RRS John Murray JM7A/75 (B/6/75)
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS John Murray (74MJ) |
| Cruise identifier | JM7A/75 (B/6/75) |
| Cruise period | 1975-05-08 — 1975-05-14 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | Bristol Channel survey |
| Chief scientist | Ian Joint (Institute of Marine Environmental Research, Plymouth) |
| Ocean/sea areas | |
| General | Bristol Channel |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: number of stations = 4 |
| Water bottle stations | Quantity: number of stations = 10 Description: surface only |
| Transparency (eg transmissometer) | Quantity: number of stations = 4 |
| Chemical oceanography | |
| Phosphate | Quantity: number of stations = 4 |
| Total - P | Quantity: number of stations = 4 |
| Nitrate | Quantity: number of stations = 4 |
| Nitrite | Quantity: number of stations = 4 |
| Silicate | Quantity: number of stations = 4 |
| Contamination | |
| Suspended matter | Quantity: number of stations = 4 |
| Biology and fisheries | |
| Primary productivity | Quantity: number of stations = 11 |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 11 |
| Particulate organic matter (inc POC, PON) | Quantity: number of stations = 11 |
| Biochemical measurements (eg lipids, amino acids) | Quantity: number of stations = 11 |
| Phytoplankton | Quantity: number of stations = 11 |
| Zooplankton | Quantity: number of stations = 11 Description: physiology |
| Pelagic bacteria/micro-organisms | Quantity: number of stations = 11 |
| Zoobenthos | Quantity: number of stations = 1 Description: identification,description of communities |
| Geology and geophysics | |
| Dredge | Quantity: number of deployments = 1 |
| Grab | Quantity: number of samples = 9 Description: chemical analysis of sediments |
| Data held at BODC | |
| Discrete samples | |
| 11 General station with STD/bottles/additional instruments | Chlorophyll pigment concentrations in water bodies Salinity of the water column Phaeopigment concentrations in the water column Temperature of the water column |
