Resources

RRS James Cook JC125 (JC124, JC126)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Cook (740H)
Cruise identifierJC125 (JC124, JC126)
Cruise period2015-08-09 — 2015-09-12
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnSouthampton, United Kingdom
PurposeResearch
ObjectivesJC124-125-126 focussed on the Whittard Canyon, south-west of Ireland and the UK.Submarine canyons are the main transport pathways between the shelf and the deep sea, and are often considered biodiversity hotspots. Their irregular topography provides different niches for a large variety in faunal communities. However, studying these communities and the underlying processes is a major challenge. Whittard Canyon has several sections with near-vertical or overhanging walls. Using the ROV Isis and AUV Autosub6000, we were be able to obtain a correct picture of these environments in true 3D.

The aims of the cruise were:
- To carry out further habitat mapping at different resolutions in Whittard Canyon, to increase understanding of the system and to test the predictive habitat models built within CODEMAP using data from 2009
- To test and apply sideways multibeam mapping, in order to develop a true 3D habitat model of the canyon
- To revisit key habitats in the canyon in order to establish potential changes over the last 6 years.
- To measure the water column structure in the Eastern Branch of Whittard Canyon, to allow the inclusion of oceanographic parameters in the predictive habitat models.

Besides the overall CODEMAP aspect, there were two additional short sections to this expedition. JC124 comprised 3 days at the start of the cruise, and 2 days later on, aimed at collecting seabed data for the UK Government (DEFRA, JNCC and CEFAS) in the rMCZ 'Haig Fras' and 'The Canyons'. Also for this work we used the AUV and ROV - the Canyons are located directly next to Whittard Canyon. The work there will be integrated with the Whittard Canyon work. JC126 covered 3 days at the end of the cruise, and was aimed at the technical trials of a novel vibrocoring system for the ROV.
Chief scientistJennifer A Gales (University of Plymouth, School of Biological and Marine Sciences), Russell B Wynn (National Oceanography Centre, Southampton), Veerle A Huvenne (National Oceanography Centre, Southampton)
ProjectCompex Deep-sea Environments: Mapping habitat heterogeneity As Proxy for Biodiversity (CODEMAP)
Cruise reportRRS James Cook JC125 (JC124, JC126) cruise report jc124_125_126.pdf (28.15 MB) 
Ocean/sea areas 
GeneralCeltic Sea
North East Atlantic Ocean (limit 40W)
SpecificHaig Fras. Whittard Canyon.
Track chartsRRS James Cook JC125 (JC124, JC126) cruise track — jc125trk.pdf (1.02 MB) 
Measurements 
Physical oceanography 
CTD stationsQuantity: number of profiles = 20
Description: CTD casts
Current profiler (eg ADCP)Quantity: track kilometres = 4000
Description: ADCP 75kHz recording
Other physical oceanographic measurementsQuantity: activity duration in days = 21
Description: Seaglider deployment
Other physical oceanographic measurementsQuantity: number of profiles = 2
Description: SVP
Biology and fisheries 
Biochemical measurements (eg lipids, amino acids)Quantity: number of stations = 6
Description: SAPS filtrations
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 8
Description: Mega cores for geology and biogeochemistry
Core - soft bottomQuantity: number of cores = 2
Description: Boxcores
Core - soft bottomQuantity: number of cores = 14
Description: Piston cores
Bottom photographyQuantity: number of dives = 27
Description: ROV dives
Geophysical measurements made at depthQuantity: number of deployments = 15
Description: Autosub6000 missions
Multi-beam echosoundingQuantity: survey square kilometres = 4000
Description: EM120 and EM710 multibeam data
Single channel seismic reflectionQuantity: track kilometres = 4000
Description: SBP120 track
Moorings, landers, buoys 
Biology and fisheries 
Eggs and larvae48° 38' 59" N  10° 1' 59" W — Larval trap for Acesta excavata
Eggs and larvae48° 46' 0" N  10° 28' 0" W — Larval trap for Acesta excavata
Data held at BODC Get data
Series/Profiles 
20  CTD/STD cast
Reference numbers
Transmittance and attenuance of the water column
Temperature of the water column
Vertical spatial coordinates
Dissolved oxygen parameters in the water column
Optical backscatter
Salinity of the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies
Reference numbers
Transmittance and attenuance of the water column
Temperature of the water column
Vertical spatial coordinates
Dissolved oxygen parameters in the water column
Optical backscatter
Salinity of the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies

BODC idDate/TimeLocationDoc.
22027842015-08-10 11:02:13 50° 23' 49" N  7° 42' 43" W  View metadata report for BODC series reference number 2202784
22028152015-08-15 15:56:36 48° 23' 22" N  9° 59' 46" W  View metadata report for BODC series reference number 2202815
22029202015-08-26 18:36:18 48° 28' 5" N  9° 38' 36" W  View metadata report for BODC series reference number 2202920
22029322015-08-26 20:04:18 48° 28' 19" N  9° 38' 55" W  View metadata report for BODC series reference number 2202932
22029072015-08-26 13:34:15 48° 27' 41" N  9° 38' 0" W  View metadata report for BODC series reference number 2202907
22029562015-08-26 23:32:10 48° 29' 27" N  9° 40' 30" W  View metadata report for BODC series reference number 2202956
22028032015-08-13 21:32:12 47° 57' 34" N  10° 13' 1" W  View metadata report for BODC series reference number 2202803
22028272015-08-16 17:12:56 48° 39' 18" N  10° 2' 3" W  View metadata report for BODC series reference number 2202827
22028882015-08-26 10:01:43 48° 28' 29" N  9° 39' 11" W  View metadata report for BODC series reference number 2202888
22027962015-08-10 11:59:45 50° 23' 49" N  7° 42' 43" W  View metadata report for BODC series reference number 2202796
22028642015-08-25 12:17:30 48° 27' 56" N  9° 38' 19" W  View metadata report for BODC series reference number 2202864
22029192015-08-26 15:00:47 48° 27' 56" N  9° 38' 18" W  View metadata report for BODC series reference number 2202919
22029682015-09-01 08:36:10 48° 28' 29" N  9° 39' 11" W  View metadata report for BODC series reference number 2202968
22028522015-08-25 10:31:46 48° 27' 42" N  9° 38' 0" W  View metadata report for BODC series reference number 2202852
22029442015-08-26 21:54:21 48° 28' 51" N  9° 39' 38" W  View metadata report for BODC series reference number 2202944
22028402015-08-20 10:30:09 48° 45' 39" N  10° 27' 39" W  View metadata report for BODC series reference number 2202840
22029812015-09-06 02:27:13 48° 39' 13" N  10° 2' 0" W  View metadata report for BODC series reference number 2202981
22029932015-09-06 12:37:15 48° 29' 10" N  10° 2' 56" W  View metadata report for BODC series reference number 2202993
22028392015-08-20 03:56:28 48° 39' 12" N  10° 2' 0" W  View metadata report for BODC series reference number 2202839
22028762015-08-25 13:59:18 48° 28' 5" N  9° 38' 36" W  View metadata report for BODC series reference number 2202876
2  Multi-beam echosounder
Reference numbers
Horizontal spatial co-ordinates
Bathymetry and Elevation
Reference numbers
Horizontal spatial co-ordinates
Bathymetry and Elevation

BODC idDate/TimeLocationDoc.
20270202015-08-14 01:23 47° 32' 25" N  11° 13' 24" W — 49° 0' 1" N  9° 10' 15" W  View metadata report for BODC series reference number 2027020
20270322015-08-15 02:05 48° 27' 43" N  9° 57' 38" W — 48° 45' 30" N  9° 33' 35" W  View metadata report for BODC series reference number 2027032
Discrete samples 
20  CTD frame plus rosette sampler