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RRS Discovery D257
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS Discovery (74E3) |
Cruise identifier | D257 |
Cruise period | 2001-09-21 — 2001-10-09 |
Status | Completed |
Port of departure | Govan, United Kingdom |
Port of return | Govan, United Kingdom |
Purpose | Research |
Objectives | 1. Occupy the Ellett Line (Sound of Mull to Rockall) and deploy moorings at 'F' and 'M'.
2. Work 3 stations within the Clyde Sea - CTD and Rosette, corers and landers ... 3. Work 2 stations either side of Wyville Thomson Ridge about 1100m CTD and Rosette, corers and landers ... 4. Trawl for coral in S. Minch off Mingulay. 5. Deploy 3 ADCP moorings in F/S Channel. 6. Various underway measurements along cruise track. |
Chief scientist | Colin R Griffiths (Scottish Association for Marine Science) |
Project | Northern Seas and OAERRE Edinburgh |
Coordinating body | SAMS/School of Life Sciences, Napier University, Edinburgh, UK |
Cruise report | ![]() ![]() ![]() |
Ocean/sea areas | |
General | North East Atlantic Ocean (limit 40W) |
Specific | Rockall Trough, Clyde Sea, Wyville Thomson Ridge, Sea of the Hebrides |
Track charts | ![]() |
Measurements | |
Physical oceanography | |
Bathythermograph | Quantity: number of profiles = 58 Description: XBT drops with T5 and T7 probes |
Water bottle stations | Quantity: number of stations = 26 Description: Rosette pylon - 24 bottles samples taken for salinity, Chl, nutrients, radiochemistry, phytoplankton and oxygen |
CTD stations | Quantity: number of profiles = 26 Description: using SBE9/11+ and oxygen, Fl. Trans, L55 |
Subsurface temperature and salinity measurements | Quantity: track kilometres = 2778 Description: Underway measurements ADCP, T, S, Fl, Trans, Chl |
Current profiler (eg ADCP) | Quantity: track kilometres = 2778 Description: Underway measurements ADCP, T, S, Fl, Trans, Chl |
Chemical oceanography | |
Oxygen | Quantity: number of deployments = 39 Description: NIOZ, multi, mega corers |
Total - P | Quantity: number of deployments = 39 Description: NIOZ, multi, mega corers |
Nitrate | Quantity: number of deployments = 39 Description: NIOZ, multi, mega corers |
Other chemical oceanographic measurements | Quantity: number of deployments = 39 Description: NIOZ, multi, mega corers |
Biology and fisheries | |
Phytoplankton | Quantity: number of stations = 26 Description: Vertical plankton net |
Zooplankton | Quantity: number of stations = 26 Description: Vertical plankton net |
Other biological/fisheries measurement | Quantity: number of hauls = 1 Description: Agissez trawl (S. Minch) coral |
Meteorology | |
Routine standard measurements | Quantity: activity duration in days = 18 Description: Synoptic Met reports - voluntary observing ship |
Geology and geophysics | |
Bottom photography | Quantity: number of deployments = 8 Description: Bedhop camera b/w and colour |
Single-beam echosounding | Quantity: track kilometres = 2778 Description: Bathymetry PES |
Other geological/geophysical measurements | Quantity: track kilometres = 2778 Description: 3.5 KHz sub bottom profiler |
Moorings, landers, buoys | |
Physical oceanography | |
Current meters | 57° 31' 59" N 12° 15' 0" W — Deploy 5 RCM's Mooring F |
Current meters | 57° 31' 59" N 10° 22' 59" W — Deploy 6 RCM's mooring M |
Current profiler (eg ADCP) | 60° 12' 59" N 6° 24' 59" W — Deploy WT2 ADCP 75 LR (recovered on Scotia 1501S in October 2001) |
Current profiler (eg ADCP) | 60° 34' 59" N 4° 47' 59" W — Deploy WT3 ADCP 75 LR (recovered on Scotia 1501S trip in October 2001) |
Current profiler (eg ADCP) | 59° 53' 59" N 6° 18' 59" W — Deploy WT1 ADCP 300 (recovered on Scotia 1501S trip in October 2001) |
Chemical oceanography | |
Oxygen | 60° 15' 0" N 6° 52' 59" W — SAMS Lander - deployed for about 24 hours |
Oxygen | 59° 42' 59" N 7° 9' 0" W — SAMS Lander - deployed for about 24 hours |
Oxygen | 55° 58' 59" N 4° 52' 59" W — SAMS Lander - deployed for about 24 hours |
Oxygen | 55° 47' 59" N 5° 15' 59" W — SAMS Lander - deployed for about 24 hours |
Oxygen | 55° 13' 59" N 5° 15' 59" W — SAMS Lander - deployed for about 24 hours |