RV Lough Foyle LFjul93

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Lough Foyle (74LG)
Cruise identifierLFjul93
Cruise period1993-07-31 — 1993-08-03
Port of departureBelfast, United Kingdom
Port of returnBelfast, United Kingdom
Objectives1. To collect biological (phytoplankton and zooplankton), chemical (dissolved
inorganic nutrients and particulate carbon and nitrogen) and physical (sea
temperature, conductivity and surface and sub-surface irradiance) data from
selected stations in the Irish Sea for the purpose of continuing the
observational study of the biological oceanography of the NW Irish Sea.

2. To undertake experiments to estimate the rate of carbon fixation by
phytoplankton at selected stations using simulated in situ and in situ incubation
techniques. To carry out size fractionation productivity experiments.

3. To make measurements of the natural fluorescence emitted by phytoplankton
as part of a study to evaluate the use of natural fluorescence as a measure of
phytoplankton biomass and production.

4. To collect sediment cores from selected stations for the purpose of estimating
the amounts of phytoplankton pigments in the sediment and the organic carbon
and nitrogen content of the sediment.

5. To retrieve the sediment traps deployed at station 38.
Chief scientistRichard Gowen (Department of Agriculture for Northern Ireland)
Cruise reportRV Lough Foyle LFjul93 cruise report lf_jul93.pdf (0.06 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificWestern Irish Sea and North Channel
Track chartsRV Lough Foyle LFjul93 cruise track — lf_jul93track.pdf (0.01 MB) 
Biology and fisheries 
Primary productivityQuantity: number of experiments = 7
Description: Primary production experiments
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of deployments = 2
Description: Solar fluorometer
Sediment trapsQuantity: number of recoveries = 1
Description: Sediment traps and the guard buoys recovered from station 38