RRS Charles Darwin CD12
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Charles Darwin (74AB) |
| Cruise identifier | CD12 |
| Cruise period | 1986-04-30 — 1986-05-15 |
| Status | Completed |
| Port of departure | Falmouth, United Kingdom |
| Port of return | Falmouth, United Kingdom |
| Purpose | Research |
| Objectives | 1) Sampling and analysis of biogenic sulphur compounds in the sea and marine atmosphere at the time of Phaeocystis blooms in the southern North Sea (contract financed by the CEC).
2) Related hydrographic observations (temperature, salinity, chlorophyll, inorganic nutrients, etc.), and measurements of primary production using Carbon 14 and Oxygen methods. 3) Biochemical studies on Phaeocystis blooms - partitioning of organic carbon and nitrogen in dissolved and particulate phases, mucous production, and phosphorus assimilation. 4) Secondary production (copepods) and geochemical (water column and sediments) studies in waters affected by Phaeocystis. |
| Chief scientist | Patrick M Holligan (Marine Biological Association of the UK) |
| Cruise report |  (0.26 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | English Channel/ S. North Sea |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | |
| Water bottle stations | Quantity: number of stations = 50 Description: More than 50 S surface only |
| CTD stations | Quantity: number of stations = 27 |
| Chemical oceanography | |
| Oxygen | |
| Phosphate | |
| Nitrate | |
| Nitrite | |
| Silicate | |
| pH | |
| Biology and fisheries | |
| Primary productivity | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 500 |
| Particulate organic matter (inc POC, PON) | |
| Phytoplankton | |
| Zooplankton | Description: survey:taxonomy,distribution |
| Geology and geophysics | |
| Dredge | Quantity: number of samples = 10 |
| Grab | Quantity: number of samples = 11 Description: chemical analysis of sediments |
