Cruise inventory

RV G A Reay GAR3/86

Cruise summary report

Cruise Info. 
Ship name (ship code)RV G A Reay (74GD)
Cruise identifierGAR3/86
Cruise period1986-05-30 — 1986-06-14
StatusCompleted
Port of departureDundee, United Kingdom
Port of returnPlymouth, United Kingdom
PurposeResearch
Objectives1. To measure the concentrations and distribution of major nutrients in the North Sea with particular emphasis on the sea areas bordering the major estuaries.
2. To measure the rates of primary production and nitrogen assimilation of phytoplankton and their horizontal distributions in relation to nitrogen inputs.
3. To measure the variations in the natural abundance of 15N in particulate and dissolved nitrogen and to relate these to the natural inputs and internal recycling.
4. To measure the sedimentation rate of particulate matter at selected sites in the North Sea.
5. To measure the rates of dentrification in the sediments of the North Sea.
6. To measure the rates of bacterial production in the North Sea and its relation to estuarine plumes and particulate matter.
Chief scientistNick Owens (Institute of Marine Environmental Research, Plymouth)
Cruise reportRV G A Reay GAR3/86 cruise report ga_reay3_86.pdf — access key 'C' (0.67 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorth Sea and English Channel
Track chartsRV G A Reay GAR3/86 cruise track — trk3169a.html RV G A Reay GAR3/86 cruise track — trk3169b.html RV G A Reay GAR3/86 cruise track — trk3169c.html RV G A Reay GAR3/86 cruise track — trk3169d.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 2778
BathythermographQuantity: number of profiles = 13
Water bottle stationsQuantity: number of stations = 8
Subsurface temperature and salinity measurementsQuantity: track kilometres = 1918.672
Description: vertical profiles using fluorometers from UOR.
Transparency (eg transmissometer)Quantity: track kilometres = 2778
Description: continuous surface sampling turbidity
Chemical oceanography 
OxygenQuantity: 12
PhosphateQuantity: 12
Description: 1500 nautical miles continuous.
NitrateQuantity: 12
Description: 1500 nautical miles continuous.
NitriteQuantity: 12
Description: 1500 nautical miles continuous.
AmmoniaQuantity: track kilometres = 2778
Description: continuous surface sampling NH4
SilicateQuantity: 12
Description: 1500 nautical miles continuous.
IsotopesQuantity: 12
Other chemical oceanographic measurementsQuantity: track kilometres = 2778
Description: continuous surface sampling urea
Biology and fisheries 
Sediment trapsQuantity: 4
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 7
Description: chemical analysis