RRS Charles Darwin CD5
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Charles Darwin (74AB) |
| Cruise identifier | CD5 |
| Cruise period | 1985-07-23 — 1985-08-02 |
| Status | Completed |
| Port of departure | Falmouth, United Kingdom |
| Port of return | Falmouth, United Kingdom |
| Purpose | Research |
| Objectives | To investigate the biogeochemical cycling of Nitrogen in contrasting ocean waters along a SW section of the UK Continental Shelf.
To test the deployment, behaviour, structural integrity and recovery of an experimental mesocosm bag (MB) intended for capture of the microbial ecosystem and tracking the passage of N in the microbial loop. To characterise the SW shelf section in terms of nutrient distribution, pigments, N cycling microbes. To measure fine scale vertical distribution of above parameters at thermocline region of CS-2. To measure rates of size-fractionated assimilation and regeneration of N species in euphotic, thermocline and deep waters. To measure the distribution, production and degradation of photosynthetic pigments in various size fractions using HPLC. To measure the impact of microzooplankton grazing on bacterial and phytoplankton populations and its effect on N cycling. To obtain shelf section of dissolved trace metals (Al, Mn, Cu, Cd, Ni, Zn, Pb) distribution and their biogeochemical associations with Nitrogen cycling. |
| Chief scientist | R Fauzi C Mantoura (Institute of Marine Environmental Research, Plymouth) |
| Project | MICRON 5 |
| Cruise report |  (0.28 MB) |
| Ocean/sea areas | |
| General | Bristol Channel Celtic Sea |
| Specific | Western Approaches to the English and Bristol Channels |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Water bottle stations | Quantity: number of stations = 2 Description: S surface only |
| CTD stations | Quantity: number of stations = 8 |
| Chemical oceanography | |
| Oxygen | Quantity: number of stations = 8 |
| Phosphate | Quantity: number of stations = 8 |
| Nitrate | Quantity: number of stations = 8 |
| Nitrite | Quantity: number of stations = 8 |
| Silicate | Quantity: number of stations = 8 |
| Trace elements | Quantity: number of stations = 8 |
| Contamination | |
| Trace metals | Quantity: number of stations = 8 |
| Biology and fisheries | |
| Primary productivity | Quantity: number of stations = 3 |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 8 |
| Particulate organic matter (inc POC, PON) | Quantity: number of stations = 8 |
| Phytoplankton | Quantity: number of stations = 3 |
| Zooplankton | Quantity: number of stations = 3 |
| Seston | Quantity: number of stations = 8 |
| Pelagic bacteria/micro-organisms | Quantity: number of stations = 3 |
