RRS James Cook JC125 (JC124, JC126)
Cruise summary report
| Cruise Info. | |||||||||||||
| Ship name (ship code) | RRS James Cook (740H) | ||||||||||||
| Cruise identifier | JC125 (JC124, JC126) | ||||||||||||
| Cruise period | 2015-08-09 — 2015-09-12 | ||||||||||||
| Status | Completed | ||||||||||||
| Port of departure | Southampton, United Kingdom | ||||||||||||
| Port of return | Southampton, United Kingdom | ||||||||||||
| Purpose | Research | ||||||||||||
| Objectives | JC124-125-126 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 scientist | Jennifer 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) | ||||||||||||
| Project | Compex Deep-sea Environments: Mapping habitat heterogeneity As Proxy for Biodiversity (CODEMAP) | ||||||||||||
| Cruise report |  (28.15 MB) | ||||||||||||
| Ocean/sea areas | |||||||||||||
| General | Celtic Sea North East Atlantic Ocean (limit 40W) | ||||||||||||
| Specific | Haig Fras. Whittard Canyon. | ||||||||||||
| Track charts | (1.02 MB) | ||||||||||||
| Measurements | |||||||||||||
| Physical oceanography | |||||||||||||
| CTD stations | Quantity: number of profiles = 20 Description: CTD casts | ||||||||||||
| Current profiler (eg ADCP) | Quantity: track kilometres = 4000 Description: ADCP 75kHz recording | ||||||||||||
| Other physical oceanographic measurements | Quantity: activity duration in days = 21 Description: Seaglider deployment | ||||||||||||
| Other physical oceanographic measurements | Quantity: 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 bottom | Quantity: number of cores = 14 Description: Piston cores | ||||||||||||
| Core - soft bottom | Quantity: number of cores = 2 Description: Boxcores | ||||||||||||
| Core - soft bottom | Quantity: number of cores = 8 Description: Mega cores for geology and biogeochemistry | ||||||||||||
| Bottom photography | Quantity: number of dives = 27 Description: ROV dives | ||||||||||||
| Geophysical measurements made at depth | Quantity: number of deployments = 15 Description: Autosub6000 missions | ||||||||||||
| Multi-beam echosounding | Quantity: survey square kilometres = 4000 Description: EM120 and EM710 multibeam data | ||||||||||||
| Single channel seismic reflection | Quantity: track kilometres = 4000 Description: SBP120 track | ||||||||||||
| Moorings, landers, buoys | |||||||||||||
| Biology and fisheries | |||||||||||||
| Eggs and larvae | 48° 46' 0" N 10° 28' 0" W — Larval trap for Acesta excavata | ||||||||||||
| Eggs and larvae | 48° 38' 59" N 10° 1' 59" W — Larval trap for Acesta excavata | ||||||||||||
| Data held at BODC | Get data | ||||||||||||
| Series/Profiles | |||||||||||||
| 2 Multi-beam echosounder | Reference numbers Horizontal spatial co-ordinates Bathymetry and Elevation
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