Cruise Info. | |
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Ship name (ship code) | RRS Discovery (74EQ) |
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Cruise identifier | DY120 |
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Cruise period | 2020-10-08 — 2020-10-24 |
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Status | Completed |
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Port of departure | Southampton, United Kingdom |
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Port of return | Southampton, United Kingdom |
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Purpose | Research |
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Objectives | This cruise is a contribution to the international Overturning in the Subpolar North Atlantic Programme (OSNAP) and NC LTSS. This cruise is for mooring recovery and re-deployment in the Iceland Basin and Rockall Trough, funded through the NC LTSS, the UK-OSNAP-Ext proposal, and a UK-OSNAP follow-on proposal. The following moorings were recovered and redeployed: Iceland Basin, 3 moorings IB3, IB4, IB5 (OSNAP), Rockall Trough, 3 moorings (RTWB1, RTWB2, RTEB1) and the deployment of an ADCP lander (RHADCP1) (The Ellett Array) and a Darwin Mounds mooring. Calibration CTDs were conducted before and after each mooring deployment. A CTD section from the IB3 position to the Scottish continental shelf was also made.
The OSNAP array deployed since July 2014 is purposefully designed to provide a continuous record of the full-water column, trans-basin fluxes of heat, mass and freshwater in the subpolar North Atlantic, on a section from Newfoundland to Greenland to Scotland. |
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Chief scientist | Stuart A Cunningham (Scottish Association for Marine Science) |
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Project | UK - Overturning in the Subpolar North Atlantic Programme (UK-OSNAP) |
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Cruise report | (19.30 MB) |
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Ocean/sea areas | |
General | North East Atlantic Ocean (limit 40W) |
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Specific | Iceland Basin; Irminger Basin |
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Measurements | |
Physical oceanography | |
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Surface measurements underway (T,S) | Quantity: activity duration in days = 17 Description: Continuous underway measurements of temperature, salinity and conductivity |
Bathythermograph | Quantity: activity duration in days = 17 Description: Sea floor depth using an EA640, EM122 and EM710 echosounder |
CTD stations | Quantity: number of stations = 10 Description: SeaBird 911 plus CTD. |
Current profiler (eg ADCP) | Quantity: number of stations = 10 Description: Sea water velocities using a RDI WH monitor 300 kHz lowered acoustic doppler current profiler (LADCP) |
Other physical oceanographic measurements | Quantity: activity duration in days = 17 Description: Underway meteorological and sea surface measurements from the SurfMet System |
Chemical oceanography | |
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Oxygen | Quantity: number of stations = 10 Description: Oxygen samples taken from CTD Niskin bottles |
Phosphate | Quantity: number of stations = 10 Description: Nutrient samples taken from CTD Niskin bottles |
Nitrate | Quantity: number of stations = 10 Description: Nutrient samples taken from CTD Niskin bottles |
Silicate | Quantity: number of stations = 10 Description: Nutrient samples taken from CTD Niskin bottles |
Other chemical oceanographic measurements | Quantity: number of stations = 10 Description: Carbon samples taken from CTD Niskin bottles |
Other chemical oceanographic measurements | Quantity: number of stations = 10 Description: Salinity samples taken from CTD Niskin bottles |
Meteorology | |
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Routine standard measurements | Quantity: activity duration in days = 17 Description: Underway meteorological and sea surface measurements from the SurfMet System |
Moorings, landers, buoys | |
Physical oceanography | |
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Current meters | 57° 59' 24" N 23° 38' 48" W — NC LTSS Ellett Array mooring IB3 recovered at 04:10 on 19/10/20 |
Current meters | 58° 0' 46" N 23° 34' 27" W — NC LTSS Ellett Array mooring IB3 deployed at 12:16 on 20/10/20 |
Current meters | 57° 28' 9" N 11° 41' 11" W — UK OSNAP mooring WB2 recovery at 10:54 on 14/10/20 |
Current meters | 57° 5' 55" N 8° 26' 25" W — UK OSNAP mooring EB1 deployed at 18:07 on 12/10/20 |
Current meters | 59° 51' 40" N 6° 57' 58" W — NC LTSS Darwin Mounds Mooring 1 recovered at 22:40 on 22/10/20 |
Current meters | 57° 28' 10" N 11° 17' 49" W — UK OSNAP mooring WB1 deployed at 16:00 on 15/10/20 |
Current meters | 57° 59' 23" N 20° 51' 13" W — NC LTSS Ellett Array mooring IB4 deployed at 12:43 on 18/10/20 |
Current meters | 57° 28' 17" N 11° 41' 8" W — UK OSNAP mooring WB2 deployed at 16:55 on 14/10/20 |
Current meters | 57° 48' 32" N 18° 49' 45" W — NC LTSS Ellett Array mooring IB5 recovered at 10:36 on 16/10/20 |
Current meters | 57° 59' 18" N 21° 8' 46" W — NC LTSS Ellett Array mooring IB4 recovered at 12:03 on 17/10/20 |
Current meters | 57° 5' 58" N 8° 26' 12" W — UK OSNAP mooring EB1 recovery at on 10:25 12/10/20 |
Current meters | 57° 48' 4" N 18° 49' 43" W — NC LTSS Ellett Array mooring IB5 deployed at 17:51 on 16/10/20 |
Current meters | 57° 28' 18" N 11° 17' 0" W — UK OSNAP mooring WB1 recovery at 07:01 on 19/10/20 |
Current meters | 59° 51' 40" N 6° 57' 20" W — NC LTSS Darwin Mounds Mooring 1 deployed at 10:25 on 23/10/20 |
Current profiler (eg ADCP) | 58° 0' 46" N 23° 34' 27" W — NC LTSS Ellett Array mooring IB3 deployed at 12:16 on 20/10/20 |
Current profiler (eg ADCP) | 57° 36' 53" N 14° 35' 20" W — UK OSNAP mooring RHADCP1 deployed at 19:21 on 15/10/20 |
Current profiler (eg ADCP) | 57° 59' 18" N 21° 8' 46" W — NC LTSS Ellett Array mooring IB4 recovered at 12:03 on 17/10/20 |
Current profiler (eg ADCP) | 57° 59' 24" N 23° 38' 48" W — NC LTSS Ellett Array mooring IB3 recovered at 04:10 on 19/10/20 |
Current profiler (eg ADCP) | 59° 51' 40" N 6° 57' 58" W — NC LTSS Darwin Mounds Mooring 1 recovered at 22:40 on 22/10/20 |
Current profiler (eg ADCP) | 59° 51' 40" N 6° 57' 20" W — NC LTSS Darwin Mounds Mooring 1 deployed at 10:25 on 23/10/20 |
Current profiler (eg ADCP) | 57° 48' 32" N 18° 49' 45" W — NC LTSS Ellett Array mooring IB5 recovered at 10:36 on 16/10/20 |
Current profiler (eg ADCP) | 57° 48' 4" N 18° 49' 43" W — NC LTSS Ellett Array mooring IB5 deployed at 17:51 on 16/10/20 |
Current profiler (eg ADCP) | 57° 59' 23" N 20° 51' 13" W — NC LTSS Ellett Array mooring IB4 deployed at 12:43 on 18/10/20 |
Other physical oceanographic measurements | 57° 28' 17" N 11° 41' 8" W — UK OSNAP mooring WB2 deployed at 16:55 on 14/10/20 |
Other physical oceanographic measurements | 58° 0' 46" N 23° 34' 27" W — NC LTSS Ellett Array mooring IB3 deployed at 12:16 on 20/10/20 |
Other physical oceanographic measurements | 57° 48' 32" N 18° 49' 45" W — NC LTSS Ellett Array mooring IB5 recovered at 10:36 on 16/10/20 |
Other physical oceanographic measurements | 57° 59' 18" N 21° 8' 46" W — NC LTSS Ellett Array mooring IB4 recovered at 12:03 on 17/10/20 |
Other physical oceanographic measurements | 57° 28' 18" N 11° 17' 0" W — UK OSNAP mooring WB1 recovery at 07:01 on 19/10/20 |
Other physical oceanographic measurements | 57° 28' 10" N 11° 17' 49" W — UK OSNAP mooring WB1 deployed at 16:00 on 15/10/20 |
Other physical oceanographic measurements | 57° 28' 9" N 11° 41' 11" W — UK OSNAP mooring WB2 recovery at 10:54 on 14/10/20 |
Other physical oceanographic measurements | 59° 51' 40" N 6° 57' 20" W — NC LTSS Darwin Mounds Mooring 1 deployed at 10:25 on 23/10/20 |
Other physical oceanographic measurements | 57° 5' 55" N 8° 26' 25" W — UK OSNAP mooring EB1 deployed at 18:07 on 12/10/20 |
Other physical oceanographic measurements | 57° 48' 4" N 18° 49' 43" W — NC LTSS Ellett Array mooring IB5 deployed at 17:51 on 16/10/20 |
Other physical oceanographic measurements | 59° 51' 40" N 6° 57' 58" W — NC LTSS Darwin Mounds Mooring 1 recovered at 22:40 on 22/10/20 |
Other physical oceanographic measurements | 57° 5' 58" N 8° 26' 12" W — UK OSNAP mooring EB1 recovery at on 10:25 12/10/20 |
Other physical oceanographic measurements | 57° 59' 23" N 20° 51' 13" W — NC LTSS Ellett Array mooring IB4 deployed at 12:43 on 18/10/20 |
Other physical oceanographic measurements | 57° 59' 24" N 23° 38' 48" W — NC LTSS Ellett Array mooring IB3 recovered at 04:10 on 19/10/20 |
Biology and fisheries | |
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Sediment traps | 59° 51' 40" N 6° 57' 58" W — NC LTSS Darwin Mounds Mooring 1 recovered at 22:40 on 22/10/20 |
Sediment traps | 59° 51' 40" N 6° 57' 20" W — NC LTSS Darwin Mounds Mooring 1 deployed at 10:25 on 23/10/20 |
Data held at BODC | |
Discrete samples | |
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1 Instrument mooring | |