RV G A Reay GAR3/86
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV G A Reay (74GD) |
| Cruise identifier | GAR3/86 |
| Cruise period | 1986-05-30 — 1986-06-14 |
| Status | Completed |
| Port of departure | Dundee, United Kingdom |
| Port of return | Plymouth, United Kingdom |
| Purpose | Research |
| Objectives | 1. 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 scientist | Nicholas J P Owens (Institute of Marine Environmental Research, Plymouth) |
| Cruise report |  (0.67 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | North Sea and English Channel |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: track kilometres = 2778 |
| Bathythermograph | Quantity: number of profiles = 13 |
| Water bottle stations | Quantity: number of stations = 8 |
| Subsurface temperature and salinity measurements | Quantity: 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 | |
| Oxygen | Quantity: 12 |
| Phosphate | Quantity: 12 Description: 1500 nautical miles continuous. |
| Nitrate | Quantity: 12 Description: 1500 nautical miles continuous. |
| Nitrite | Quantity: 12 Description: 1500 nautical miles continuous. |
| Ammonia | Quantity: track kilometres = 2778 Description: continuous surface sampling NH4 |
| Silicate | Quantity: 12 Description: 1500 nautical miles continuous. |
| Isotopes | Quantity: 12 |
| Other chemical oceanographic measurements | Quantity: track kilometres = 2778 Description: continuous surface sampling urea |
| Biology and fisheries | |
| Sediment traps | Quantity: 4 |
| Geology and geophysics | |
| Core - soft bottom | Quantity: number of cores = 7 Description: chemical analysis |
