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RRS Discovery DY130

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74EQ)
Cruise identifierDY130
Cruise period2021-03-25 — 2021-04-14
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnSouthampton, United Kingdom
PurposeResearch
ObjectivesThe aim of the RRS Discovery cruise 130 (DY130) to the PAP-SO was to service moorings at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) and Whittard Canyon. This cruise, including both the operations at the Porcupine Abyssal Plain Sustained Observatory and within the Whittard Canyon, forms part of the UK Natural Environment Council’s “Climate Linked Atlantic Sector Science” (CLASS) project (https://projects.noc.ac.uk/class-project/sustained-ocean-observations), managed by the National Oceanography Centre (NOC).
At the PAP-SO open-ocean time-series site in the Northeast Atlantic (49.0 °N 16.5 °W, 4850 m water depth) studies are made on ocean-atmosphere interactions and pelagic-benthic coupling using a range of mooring systems and direct sampling approaches. Like Smart Bay in Galway, PAP-SO is an EMSO site.
A future NERC CLASS cruise will focus on the Whittard Canyon (expected 2021/22, delayed from 2020 by Covid-19) and will have direct participation by an Irish science team (National University of Ireland Galway). Preparation for that work includes a mooring in the eastern branch of Whittard Canyon (Irish EEZ) deployed in 2019 (RRS Discovery Cruise 103, http://nora.nerc.ac.uk/id/eprint/525366/) and replaced on both DY116 and DY130.

The specific objectives of DY130 were:
Whittard Canyon (Irish EEZ):
1. Recovery of Whittard Canyon mooring (sediment trap, ADCP and CTD sensors)
2. CTD for testing release for new mooring
3. Deployment of replacement sediment trap mooring at Whittard Canyon
PAP-SO (International waters):
4. Recovery of sediment trap mooring at PAP-SO
5. Recovery of Met Office/NOC mooring with surface buoy
6. Deployment of sediment trap and sensors at PAP-SO
7. Deployment of new Met Office buoy with surface ocean biogeochemistry sensors at PAP-SO
8. Deployment of 3 gliders at PAP-SO
9. Photography of the seabed using an ROV (HyBIS)
10. Megacore sampling of the seabed
11. Short Agassiz trawls
12. WP2 zooplankton nets
13. Other associated CTDs at PAP-SO and in an eddy to the east of PAP-SO
14. Deployment of Met Office BGC Argo float (Euro Argo) in an eddy to the east of PAP-SO
Chief scientistSusan E Hartman (National Oceanography Centre, Southampton)
ProjectMarine LTSS: Climate Linked Atlantic Sector Science (CLASS)
Cruise reportRRS Discovery DY130 cruise report dy130.pdf (16.76 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificPorcupine Abyssal Plain
Track chartsRRS Discovery DY130 cruise track — dy130trk.pdf (0.40 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of track lines = 1
Description: Underway measurements for the duration of the cruise.
CTD stationsQuantity: number of stations = 10
Description: CTD profiles at PAP site. Includes release tests for mooring deployments, glider validations, PAP1 and PAP3 sensor data validation and water bottle samples. DY130- 027, 032, 045, 046, 053, 057, 065, 068, 071, 076
CTD stationsQuantity: number of stations = 1
Description: CTD profile in Irish EEZ. Primarily for release test for Whittard Canyon mooring deployment but sensor data collected and samples to validate the measurements. DY130-019
CTD stationsQuantity: number of profiles = 3
Description: CTD measurements of pressure, salinity, temperature, oxygen, chlorophyll, plus water samples from some CTDs for chlorophyll, oxygen, salinity, DIC
Biology and fisheries 
ZooplanktonQuantity: number of stations = 24
Description: WP2, plankton nets for zooplankton and microplastics – along route in UK waters and again at PAP.
ZoobenthosQuantity: number of cores = 12
Description: MacroBenthos; MeioBenthos; Foraminifera; Preserved Samples; Ecological Analysis
ZoobenthosQuantity: number of hauls = 4
Description: Benthic trawls for collection of Macro benthos and fish
Demersal fishQuantity: number of hauls = 4
Description: Benthic trawls for collection of Macro benthos and fish
MolluscsQuantity: number of hauls = 4
Description: Benthic trawls for collection of Macro benthos and fish
CrustaceansQuantity: number of hauls = 4
Description: Benthic trawls for collection of Macro benthos and fish
Moorings, landers, buoys 
Physical oceanography 
Current meters48° 59' 41" N  16° 24' 16" W — Deployment of PAP-SO sediment trap mooring, on 31/3/21 station DY130-024. Includes 3 x sediment trap, 1 x current meters and 2 x CTD.
Current meters49° 0' 54" N  16° 26' 30" W — Recovery of PAP-SO sediment trap mooring on 5th April 2021, station DY116-007 that had been deployed on 20/11/20
Current profiler (eg ADCP)48° 37' 36" N  10° 0' 18" W — Deployed a mooring that includes sediment trap, ADCP and in situ CTD sensor at the Whittard Canyon in Irish EEZ 29 March 2021. Station number DY130-018. Mooring has no surface expression.
Current profiler (eg ADCP)48° 37' 36" N  10° 0' 18" W — Recovered a mooring that includes sediment trap, ADCP and in situ CTD sensor at the Whittard Canyon in Irish EEZ. Deployed 13th November 2020. Station number DY116-002 Mooring had no surface expression.
Chemical oceanography 
Oxygen49° 34' 59" N  14° 45' 0" W — Deployment of Biogeochemistry Argo Float. DY130-082
Oxygen48° 57' 11" N  16° 19' 41" W — Deployed top part of PAP1 mooring that includes surface Met sensors and CO2 and oceanographic sensors on keel (CTD, Chlorophyll fluorescence, CO, O2) and added a sub-surface 30m frame of BGC sensors. Deployed 3/4/21 as DY130-038.
Oxygen48° 57' 11" N  16° 19' 41" W — Recovered top part of previously deployed PAP mooring ie: surface Mobilis buoy. Full mooring deployed as DY116-008 (21/11/20)
Carbon dioxide48° 57' 11" N  16° 19' 41" W — Deployed top part of PAP1 mooring that includes surface Met sensors and CO2 and oceanographic sensors on keel (CTD, Chlorophyll fluorescence, CO, O2) and added a sub-surface 30m frame of BGC sensors. Deployed 3/4/21 as DY130-038.
Carbon dioxide48° 57' 11" N  16° 19' 41" W — Recovered top part of previously deployed PAP mooring ie: surface Mobilis buoy. Full mooring deployed as DY116-008 (21/11/20)
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)49° 34' 59" N  14° 45' 0" W — Deployment of Biogeochemistry Argo Float. DY130-082
Phytoplankton pigs (eg chlorophyll, fluorescence)48° 57' 11" N  16° 19' 41" W — Deployed top part of PAP1 mooring that includes surface Met sensors and CO2 and oceanographic sensors on keel (CTD, Chlorophyll fluorescence, CO, O2) and added a sub-surface 30m frame of BGC sensors. Deployed 3/4/21 as DY130-038.
Phytoplankton pigs (eg chlorophyll, fluorescence)48° 57' 11" N  16° 19' 41" W — Recovered top part of previously deployed PAP mooring ie: surface Mobilis buoy. Full mooring deployed as DY116-008 (21/11/20)
Sediment traps49° 0' 54" N  16° 26' 30" W — Recovery of PAP-SO sediment trap mooring on 5th April 2021, station DY116-007 that had been deployed on 20/11/20
Sediment traps48° 59' 41" N  16° 24' 16" W — Deployment of PAP-SO sediment trap mooring, on 31/3/21 station DY130-024. Includes 3 x sediment trap, 1 x current meters and 2 x CTD.
Sediment traps48° 37' 36" N  10° 0' 18" W — Recovered a mooring that includes sediment trap, ADCP and in situ CTD sensor at the Whittard Canyon in Irish EEZ. Deployed 13th November 2020. Station number DY116-002 Mooring had no surface expression.
Sediment traps48° 37' 36" N  10° 0' 18" W — Deployed a mooring that includes sediment trap, ADCP and in situ CTD sensor at the Whittard Canyon in Irish EEZ 29 March 2021. Station number DY130-018. Mooring has no surface expression.
Meteorology 
Routine standard measurements48° 57' 11" N  16° 19' 41" W — Recovered top part of previously deployed PAP mooring ie: surface Mobilis buoy. Full mooring deployed as DY116-008 (21/11/20)
Routine standard measurements48° 57' 11" N  16° 19' 41" W — Deployed top part of PAP1 mooring that includes surface Met sensors and CO2 and oceanographic sensors on keel (CTD, Chlorophyll fluorescence, CO, O2) and added a sub-surface 30m frame of BGC sensors. Deployed 3/4/21 as DY130-038.
Data held at BODC Get data
Series/Profiles 
2  Acoustic current meter
Reference numbers
Moored instrument depth
Sound velocity and travel time in the water column
Date and time
Temperature of the water column
Platform or instrument orientation
Vertical velocity of the water column (currents)
Horizontal velocity of the water column (currents)
Sea level
Reference numbers
Moored instrument depth
Sound velocity and travel time in the water column
Date and time
Temperature of the water column
Platform or instrument orientation
Vertical velocity of the water column (currents)
Horizontal velocity of the water column (currents)
Sea level

BODC idDate/TimeLocationDoc.
20540172021-03-31 15:30  — 2022-05-10 08:00 48° 59' 42" N  16° 24' 29" W  View metadata report for BODC series reference number 2054017
20540052021-03-31 15:30  — 2022-05-10 08:00 48° 59' 42" N  16° 24' 29" W  View metadata report for BODC series reference number 2054005
37  Bottle station
Reference numbers
Nitrite concentration parameters in the water column
Vertical spatial coordinates
Phosphate concentration parameters in the water column
Dissolved oxygen parameters in the water column
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Quality control flags
Chlorophyll pigment concentrations in water bodies
Reference numbers
Nitrite concentration parameters in the water column
Vertical spatial coordinates
Phosphate concentration parameters in the water column
Dissolved oxygen parameters in the water column
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Quality control flags
Chlorophyll pigment concentrations in water bodies

BODC idDate/TimeLocationDoc.
20463802021-04-05 10:01:30 48° 52' 19" N  16° 31' 33" W  View metadata report for BODC series reference number 2046380
20463922021-04-06 07:32 48° 56' 7" N  16° 26' 32" W  View metadata report for BODC series reference number 2046392
20487062021-03-30 17:16 48° 49' 0" N  16° 26' 31" W  View metadata report for BODC series reference number 2048706
20487432021-04-02 08:12 48° 56' 23" N  16° 27' 53" W  View metadata report for BODC series reference number 2048743
20487552021-04-04 06:53 48° 57' 35" N  16° 26' 48" W  View metadata report for BODC series reference number 2048755
20487792021-04-05 10:01:30 48° 52' 19" N  16° 31' 33" W  View metadata report for BODC series reference number 2048779
20487802021-04-06 07:32 48° 56' 7" N  16° 26' 32" W  View metadata report for BODC series reference number 2048780
20487922021-04-07 09:17:30 48° 59' 59" N  16° 30' 0" W  View metadata report for BODC series reference number 2048792
20462142021-04-04 06:53 48° 57' 35" N  16° 26' 48" W  View metadata report for BODC series reference number 2046214
20463432021-04-01 07:26 48° 56' 57" N  16° 26' 38" W  View metadata report for BODC series reference number 2046343
20488112021-04-08 11:34:30 49° 0' 0" N  16° 30' 1" W  View metadata report for BODC series reference number 2048811
20462632021-04-07 09:17:30 48° 59' 59" N  16° 30' 0" W  View metadata report for BODC series reference number 2046263
20462752021-04-08 11:34:30 49° 0' 0" N  16° 30' 1" W  View metadata report for BODC series reference number 2046275
20463792021-04-04 09:09 49° 4' 40" N  16° 30' 53" W  View metadata report for BODC series reference number 2046379
20461582021-03-28 16:13:30 48° 15' 27" N  10° 8' 51" W  View metadata report for BODC series reference number 2046158
20461952021-04-01 07:26 48° 56' 57" N  16° 26' 38" W  View metadata report for BODC series reference number 2046195
20462022021-04-02 08:12 48° 56' 23" N  16° 27' 53" W  View metadata report for BODC series reference number 2046202
20462992021-04-12 01:40:30 49° 15' 37" N  14° 30' 13" W  View metadata report for BODC series reference number 2046299
20463312021-03-31 07:31 48° 56' 8" N  16° 26' 31" W  View metadata report for BODC series reference number 2046331
20463672021-04-04 06:53 48° 57' 35" N  16° 26' 48" W  View metadata report for BODC series reference number 2046367
20487312021-04-01 07:26 48° 56' 57" N  16° 26' 38" W  View metadata report for BODC series reference number 2048731
20488232021-04-09 08:52:30 48° 57' 43" N  16° 27' 22" W  View metadata report for BODC series reference number 2048823
20463062021-03-28 16:13:30 48° 15' 27" N  10° 8' 51" W  View metadata report for BODC series reference number 2046306
20464472021-04-12 01:40:30 49° 15' 37" N  14° 30' 13" W  View metadata report for BODC series reference number 2046447
20462512021-04-06 07:32 48° 56' 7" N  16° 26' 32" W  View metadata report for BODC series reference number 2046251
20464112021-04-07 09:17:30 48° 59' 59" N  16° 30' 0" W  View metadata report for BODC series reference number 2046411
20464352021-04-09 08:52:30 48° 57' 43" N  16° 27' 22" W  View metadata report for BODC series reference number 2046435
20461832021-03-31 07:31 48° 56' 8" N  16° 26' 31" W  View metadata report for BODC series reference number 2046183
20462262021-04-04 09:09 49° 4' 40" N  16° 30' 53" W  View metadata report for BODC series reference number 2046226
20462382021-04-05 10:01:30 48° 52' 19" N  16° 31' 33" W  View metadata report for BODC series reference number 2046238
20463182021-03-30 17:16 48° 49' 0" N  16° 26' 31" W  View metadata report for BODC series reference number 2046318
20463552021-04-02 08:12 48° 56' 23" N  16° 27' 53" W  View metadata report for BODC series reference number 2046355
20464232021-04-08 11:34:30 49° 0' 0" N  16° 30' 1" W  View metadata report for BODC series reference number 2046423
20487182021-03-31 07:31 48° 56' 8" N  16° 26' 31" W  View metadata report for BODC series reference number 2048718
20461712021-03-30 17:16 48° 49' 0" N  16° 26' 31" W  View metadata report for BODC series reference number 2046171
20462872021-04-09 08:52:30 48° 57' 43" N  16° 27' 22" W  View metadata report for BODC series reference number 2046287
20487672021-04-04 09:09 49° 4' 40" N  16° 30' 53" W  View metadata report for BODC series reference number 2048767
1  In-situ dissolved gas analyser
Reference numbers
Date and time
Metadata parameters
Partial pressure (pCO2) and fugacity (fCO2) of carbon dioxide in the water column
Reference numbers
Date and time
Metadata parameters
Partial pressure (pCO2) and fugacity (fCO2) of carbon dioxide in the water column

BODC idDate/TimeLocationDoc.
21620432021-04-03 13:55  — 2022-05-03 01:55:09 48° 57' 33" N  16° 26' 14" W  View metadata report for BODC series reference number 2162043
2  In-situ nutrient analyser
Reference numbers
Date and time
Nitrate concentration parameters in the water column
Reference numbers
Date and time
Nitrate concentration parameters in the water column

BODC idDate/TimeLocationDoc.
21591882021-04-03 12:10  — 2022-03-27 12:10 48° 57' 33" N  16° 26' 14" W  View metadata report for BODC series reference number 2159188
20747252021-04-03 11:20:24  — 2022-04-18 08:20:24 48° 57' 33" N  16° 26' 14" W  View metadata report for BODC series reference number 2074725
1  Moored CTD
Reference numbers
Moored instrument depth
Sound velocity and travel time in the water column
Date and time
Salinity of the water column
Temperature of the water column
Density of the water column
Electrical conductivity of the water column
Reference numbers
Moored instrument depth
Sound velocity and travel time in the water column
Date and time
Salinity of the water column
Temperature of the water column
Density of the water column
Electrical conductivity of the water column

BODC idDate/TimeLocationDoc.
21592812021-04-03 12:00:03  — 2022-05-05 09:45:03 48° 57' 33" N  16° 26' 14" W  View metadata report for BODC series reference number 2159281
2  Pumped water sample
Horizontal spatial co-ordinates
Date and time
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Chlorophyll pigment concentrations in water bodies
Horizontal spatial co-ordinates
Date and time
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Chlorophyll pigment concentrations in water bodies

BODC idDate/TimeLocationDoc.
20486992021-03-25 20:16  — 2021-04-10 15:00 48° 0' 19" N  16° 31' 33" W — 50° 9' 10" N  3° 35' 55" W  View metadata report for BODC series reference number 2048699
20469692021-03-25 20:16  — 2021-04-12 13:00 48° 0' 19" N  17° 26' 42" W — 50° 9' 10" N  3° 35' 55" W  View metadata report for BODC series reference number 2046969
5  Water temperature and/or salinity monitor
Reference numbers
Date and time
Temperature of the water column
Reference numbers
Date and time
Temperature of the water column

BODC idDate/TimeLocationDoc.
20747012021-04-12 00:01  — 2022-05-05 10:01 48° 57' 33" N  16° 26' 14" W  View metadata report for BODC series reference number 2074701
20746942021-04-12 00:01  — 2022-05-05 10:01 48° 57' 33" N  16° 26' 14" W  View metadata report for BODC series reference number 2074694
20746822021-04-12 00:01  — 2022-05-05 09:31 48° 57' 33" N  16° 26' 14" W  View metadata report for BODC series reference number 2074682
20746702021-04-12 00:01  — 2022-01-13 15:31 48° 57' 33" N  16° 26' 14" W  View metadata report for BODC series reference number 2074670
20747132021-04-12 00:01  — 2022-03-15 21:31 48° 57' 33" N  16° 26' 14" W  View metadata report for BODC series reference number 2074713
Discrete samples 
14  CTD frame plus rosette sampler
3  Instrument mooring
34  Sample taken from ship's non-toxic supply