RRS John Murray JM1/76 (B/1/76)
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS John Murray (74MJ) |
| Cruise identifier | JM1/76 (B/1/76) |
| Cruise period | 1976-01-09 — 1976-01-15 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | Bristol Channel survey.
1. To measure rates of primary and secondary production. 2. To investigate dissolved inorganic and organic nutrients. |
| Chief scientist | Ian Joint (Institute of Marine Environmental Research, Plymouth) |
| Cruise report |  (0.10 MB) |
| Ocean/sea areas | |
| General | Bristol Channel |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Water bottle stations | Quantity: number of stations = 6 Description: surface only |
| CTD stations | Quantity: number of stations = 6 |
| Transparency (eg transmissometer) | Quantity: number of stations = 6 |
| Chemical oceanography | |
| Phosphate | Quantity: number of stations = 6 |
| Total - P | Quantity: number of stations = 6 |
| Nitrate | Quantity: number of stations = 6 |
| Nitrite | Quantity: number of stations = 6 |
| Silicate | Quantity: number of stations = 6 |
| Contamination | |
| Suspended matter | Quantity: number of stations = 6 |
| Biology and fisheries | |
| Primary productivity | Quantity: number of stations = 6 |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 6 |
| Particulate organic matter (inc POC, PON) | Quantity: number of stations = 6 |
| Dissolved organic matter (inc DOC) | Quantity: number of stations = 6 |
| Zooplankton | Quantity: number of stations = 6 Description: food chain energy transfers |
| Zoobenthos | Quantity: number of stations = 2 |
| Other biological/fisheries measurement | Quantity: number of stations = 6 Description: ATP-ADP-AMP concentrations |
| Data held at BODC | |
| Discrete samples | |
| 249 General station with STD/bottles/additional instruments | Salinity of the water column Temperature of the water column Concentration of suspended particulate material in the water column Dissolved organic carbon concentration in the water column Phaeopigment concentrations in the water column Chlorophyll pigment concentrations in water bodies |
