Cruise inventory

RRS James Cook JC073

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Cook (740H)
Cruise identifierJC073
Cruise period2012-05-18 — 2012-06-15
StatusCompleted
Port of departureGovan, United Kingdom
Port of returnGovan, United Kingdom
PurposeResearch
ObjectivesJC073 set out to study the functional ecology of cold-water coral habitats at contrasting sites in the North Atlantic west of Scotland and Ireland. The overriding objectives of the cruise were to examine the potential impacts of ocean acidification and warming on the reef framework-forming coral Lophelia pertusa since this species engineers complex habitats sustaining many other species. Specific objectives:

- Complete ROV surveys, sampling and in situ experimentation to support a variety of cruise objectives
- Conduct ship board experiments examining growth and metabolic responses of L. pertusa gathered by ROV
- Examine the microbial ecology of L. pertusa using samples collected with a purpose-built Cook sampler unit
- Examine trophic and reproductive ecology of L. pertusa
- Investigate use of dimethylsulphide (DMS) and dimethylsulphoniopropionate (DMSP) by cold-water corals
- Examine the ecophysiology and biogeochemistry of deep-sea sponges
- Conduct hydrographic surveys to examine the water column properties (CTD + O2) and carbonate chemistry above each site
- Examine the biogeochemical properties of the near-bed particle field using SAPS collection
- Complete surveys of the sediment-water interface along transects crossing different habitats associated with cold-water coral sites (SPI camera)
- Measure in situ O2 consumption of reef fauna using eddy correlation lander (ROV deployed)
- Measure in situ uptake of stable isotope labelled compounds into reef fauna (spreader chambers & clod cards)
- Gather material to examine the growth history of reef mounds and recover fossil coral carbonate using gravity coring
- Examine the effect of coral habitat on local biodiversity patterns (box coring)
- Resample historic benthic biodiversity station on Hebrides Terrace Slope (box coring)
- Complete novel habitat mapping using both ship and ROV-based multibeam echosounder surveys
- Examine spatial distribution and habitat use by deep-sea fish

In addition to the purely scientific objectives JC073 incorporated an outreach component including a 4-hour visit at sea by school children and teachers from Sgoil Lionacleit secondary school on Benbecula and a BBC One film crew.
Chief scientistJohn Murray Roberts (Heriot Watt University School of Life Sciences)
ProjectUK Ocean Acidification research programme (UKOA)
Coordinating bodyNatural Environment Research Council (NERC)
Cruise reportRRS James Cook JC073 cruise report jc073.pdf — access key 'C' (8.34 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificSea of the Hebrides (Mingulay Reef Complex), Rockall Bank (Logachev Mound Province, Pisces Dive 09 site, NW Rockall Bank), Hebrides Terrace Seamount and Hebrides Terrace Slope
Track chartsRRS James Cook JC073 cruise track — jc073trk.pdf (00 MB) 
Measurements 
Physical oceanography 
CTD stationsQuantity: number of surveys = 5
Description: Moving Vessel Profiler (MVP) survey (including laser optical plankton counter LOPC)
CTD stationsQuantity: number of profiles = 9
Description: Yo-yo CTD
CTD stationsQuantity: number of profiles = 14
Description: NMFS Seabird (replaced ROV-CTD)
CTD stationsQuantity: number of profiles = 6
Description: CTD cast and deep-water pump deployment to fill deck tanks
CTD stationsQuantity: number of profiles = 21
Description: ROV-CTD
CTD stationsQuantity: number of profiles = 40
Description: CTD cast with stand-alone pump sampling (SAPS)
Chemical oceanography 
AlkalinityQuantity: number of profiles = 40
Description: CTD cast with stand-alone pump sampling (SAPS)
Other chemical oceanographic measurementsQuantity: number of profiles = 40
Description: CTD cast with stand-alone pump sampling (SAPS)
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of surveys = 5
Description: Moving Vessel Profiler (MVP) survey (including laser optical plankton counter LOPC)
Benthic bacteria/micro-organismsQuantity: number of dives = 40
Description: ROV dives (Video, stills, OFOP log)
ZoobenthosQuantity: number of dives = 40
Description: ROV dives (Video, stills, OFOP log)
ZoobenthosQuantity: number of cores = 10
Description: Box core carbonate mound fauna
ZoobenthosQuantity: number of cores = 13
Description: Box core, Hebrides Terrace Slope
ZoobenthosQuantity: number of image series = 13
Description: Sediment Profile Imaging (SPI) camera deployment
Other biological/fisheries measurementQuantity: number of surveys = 5
Description: Moving Vessel Profiler (MVP) survey (including laser optical plankton counter LOPC)
Other biological/fisheries measurementQuantity: number of image series = 13
Description: Sediment Profile Imaging (SPI) camera deployment
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 8
Description: Gravity core
Core - soft bottomQuantity: number of cores = 13
Description: Box core, Hebrides Terrace Slope
Core - soft bottomQuantity: number of cores = 10
Description: Box core carbonate mound fauna
Bottom photographyQuantity: number of image series = 13
Description: Sediment Profile Imaging (SPI) camera deployment
Bottom photographyQuantity: number of dives = 40
Description: ROV dives (Video, stills, OFOP log)
Bottom photographyQuantity: number of surveys = 1
Description: Near-bed ROV multibeam survey (Reson 7125 sonar)
Multi-beam echosoundingQuantity: number of surveys = 1
Description: Near-bed ROV multibeam survey (Reson 7125 sonar)
Multi-beam echosoundingQuantity: number of dives = 40
Description: ROV dives (Video, stills, OFOP log)
Multi-beam echosoundingQuantity: number of surveys = 7
Description: Multibeam echosounder survey
Seismic refractionQuantity: number of profiles = 3
Description: Sub-bottom profiler
Other geological/geophysical measurementsQuantity: number of profiles = 3
Description: Sub-bottom profiler
Moorings, landers, buoys 
Physical oceanography 
Current meters56° 49' 19" N  7° 23' 42" W — Eddy correlation lander (Mingulay reef complex Area 01) recording near bed current speed, direction, salinity, temperature and oxygen concentration. Deployed 23/5 (JC073/038) and recovered 24/5/12 (JC073/045). Water depth 143 m.
Current meters55° 33' 33" N  15° 37' 16" W — Short-term single point current meter mooring (2 km east of Logachev Mounds Area 01) recording current speed, direction and CTD data (Seaguard). Deployed 26/5 and recovered 5/6/12 (JC073/56). Water depth 616 m.
Current meters55° 33' 13" N  15° 39' 8" W — Eddy correlation lander (Logachev Mounds Area 01, off-mound) recording near bed current speed, direction, salinity, temperature and oxygen concentration. Deployed 31/5 (JC073/099) and recovered 04/06/12 (JC073/125).Water depth 564 m.
Current meters55° 33' 33" N  15° 39' 21" W — Eddy correlation lander (Logachev Mounds Area 01, on-mound) recording near bed current speed, direction, salinity, temperature and oxygen concentration. Deployed 27/5 (JC073/062) and recovered 29/5/12 (JC073/093).Water depth 564 m.
Current meters56° 49' 30" N  7° 23' 36" W — Long-term (~1 year) single point current meter mooring (north of Mingulay reef complex Area 01) recording current speed and direction (Aanderaa RCM-11). Deployed 24/5/12. Recovery to be by Marine Scotland in Spring 2012 (JC073/47). Water depth 213 m.
Chemical oceanography 
Oxygen55° 33' 13" N  15° 39' 8" W — Eddy correlation lander (Logachev Mounds Area 01, off-mound) recording near bed current speed, direction, salinity, temperature and oxygen concentration. Deployed 31/5 (JC073/099) and recovered 04/06/12 (JC073/125).Water depth 564 m.
Oxygen55° 33' 33" N  15° 39' 21" W — Eddy correlation lander (Logachev Mounds Area 01, on-mound) recording near bed current speed, direction, salinity, temperature and oxygen concentration. Deployed 27/5 (JC073/062) and recovered 29/5/12 (JC073/093).Water depth 564 m.
Oxygen56° 49' 19" N  7° 23' 42" W — Eddy correlation lander (Mingulay reef complex Area 01) recording near bed current speed, direction, salinity, temperature and oxygen concentration. Deployed 23/5 (JC073/038) and recovered 24/5/12 (JC073/045). Water depth 143 m.
Data held at BODC 
Discrete samples 
10  CTD frame plus rosette samplerSalinity of the water column
20  Stand-alone pumpsParticulate total and organic carbon concentrations in the water column
Particulate total and organic nitrogen concentrations in the water column