RV Lough Foyle LF/05/96 Part I and II
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Lough Foyle (74LG) |
| Cruise identifier | LF/05/96 Part I and II |
| Cruise period | 1996-02-26 — 1996-02-29 |
| Status | Completed |
| Port of departure | Belfast, United Kingdom |
| Port of return | Belfast, United Kingdom |
| Purpose | Research |
| Objectives | To provide environmental science students from the Queen's University of Belfast with a demonstration of oceanographic equipment and other instrumentation and techniques associated with the Biological Oceanography cruise programme.
1. To assess temperature, salinity and nutrient distributions over a grid of stations in the north western Irish Sea. 2. To recover moorings from station 38. Service moorings, attach instrumentation and redeploy at station 45 on the sampling grid. 3. To assess nutrient release from sediment at stations 45 and 47. 4. To assess differences in benthic composition between an intensively trawled region of the Irish Sea and an adjacent region where trawling was restricted by the DANI instrument mooring. |
| Chief scientist | Brian Stewart (Department of Agriculture for Northern Ireland) |
| Cruise report |  (0.19 MB) |
| Ocean/sea areas | |
| General | Irish Sea and St. George's Channel |
| Specific | NW Irish Sea and North Channel. |
| Track charts | (0.02 MB) |
| Measurements | |
| Physical oceanography | |
| Water bottle stations | Quantity: number of samples = 42 Description: Taken during the 3 month period of deployment with a moored McLane water sampler. Sampled every other day at slack tide at approx the same depth. Samples were analysed for inorganic nitrogen and orthophosphate |
| CTD stations | Quantity: number of stations = 20 Description: Samples were taken every 10m over the depth profile at stations 38, 45 and 50 |
| Subsurface temperature and salinity measurements | Quantity: number of stations = 20 Description: Samples were taken every 10m over the depth profile at stations 38, 45 and 50 |
| Transparency (eg transmissometer) | Quantity: number of stations = 20 Description: Daylight permitting, Secchi discs were taken at each station |
| Chemical oceanography | |
| Oxygen | Quantity: number of stations = 3 Description: At station 38, 45 and 50, samples were taken every 10 metres for the determination of oxygen by the Winkler method |
| Total - N | Quantity: number of stations = 2 Description: Cores were taken at stations 38 and 47 and subsampled for C/N analysis |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 20 Description: Chlorophyll a. Samples were taken every 10m over the depth profile at stations 38, 45 and 50 |
| Seston | Quantity: number of hauls = 1 Description: Plankton haul taken at the entrace of Belfast Lough |
| Geology and geophysics | |
| Grab | Quantity: number of deployments = 10 Description: The Day grab was deployed 5 times at station 38 between the mooring buoys, and again 5 times about half a mile south of the station |
| Core - soft bottom | Quantity: number of stations = 2 Description: 3 sediment cores with overlying seawater were taken at stations 38 and 47 and incubated onboard ship at seawater temperature. The box corer was also deployed at station 38 to provide additional cores |
