RRS John Murray JM12/81 (B/5/81 C/4/81)
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS John Murray (74MJ) |
| Cruise identifier | JM12/81 (B/5/81 C/4/81) |
| Cruise period | 1981-09-02 — 1981-09-09 |
| Status | Completed |
| Port of departure | Barry, United Kingdom |
| Port of return | Barry, United Kingdom |
| Purpose | Research |
| Objectives | 1) To monitor the performance of the Bristol Channel to update the validation of ecosystem model GEMBASE
2) To study the relationship between light, chlorophyll, primary production and fluorescence on a C.P.R route 3) To carry out deep diving trials on the Undulating Oceanographic Recorder 4) To carry out incubation experiments to determine the uptake of ammonia by phytoplankton and bacteria |
| Chief scientist | Michael B Jordan (Institute of Marine Environmental Research, Plymouth) |
| Cruise report |  (0.08 MB) |
| Ocean/sea areas | |
| General | English Channel Irish Sea and St. George's Channel Bay of Biscay |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | |
| Transparency (eg transmissometer) | |
| Other physical oceanographic measurements | Quantity: number of stations = 72 |
| Chemical oceanography | |
| Nitrate | |
| Contamination | |
| Suspended matter | |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Description: monitoring |
