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RRS James Cook JC094
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS James Cook (740H) |
Cruise identifier | JC094 |
Cruise period | 2013-10-13 — 2013-11-29 |
Status | Completed |
Port of departure | Santa Cruz de Tenerife, Spain |
Port of return | Port of Spain, Trinidad and Tobago |
Purpose | Research |
Objectives | Reconstructing abrupt Changes in Chemistry and Circulation of the Equatorial Atlantic Ocean: Implications for global Climate and deep-water Habitats.
Objectives (a) Controls on coral habitats past and present Studying what controls the distribution of corals today and in the past requires systematic mapping, imaging and collections from deep-water coral habitats. Shipboard swath bathymetry was used for an overview of each feature, and to select sampling sites. Systematic dives up the slopes of each feature allowed collection of video, stills, live and fossil corals and seawater. In addition microbathymetry of unusual habitats was to gin a wider overview. Coral associates were imaged and collected to add depth to our knowledge of the coral habitats. (b) Development of geochemical proxies Core top sediments, live calcified corals and sponges were collected across a range of depths with associated seawater with sampling focused on the greatest possible range of environmental parameters (e.g. temperature, nutrient status, water mass). These samples will be used to test geochemical proxies. (c) Reconstruction of past climate Sediment cores and fossil corals were collected across the basin and at a range of depths to allow a history of the Atlantic to be reconstructed. (d) Ancillary Studies. A number of other collections were also made including plastics, rocks, sponges and genetics samples. |
Chief scientist | Laura F Robinson (University of Bristol School of Earth Sciences) |
Project | Tracing Oceanic Processes using Corals and Sediments (TROPICS) |
Coordinating body | Natural Environment Research Council (NERC) |
Cruise report | (21.98 MB) |
Ocean/sea areas | |
General | North East Atlantic Ocean (limit 40W) |
Specific | Equatorial Atlantic |
Track charts | (0.22 MB) |
Measurements | |
Physical oceanography | |
CTD stations | Quantity: number of deployments = 19 Description: ROV deployments. One aborted, the rest successful. Video, Digital stills, push cores, water samples, CTD data, sediment cores, benthic litter, seafloor fauna (live and fossil) |
CTD stations | Quantity: number of profiles = 6 Description: Five full depth, one test CTD with water samples taken for geochemical analyses including nutrients, oxygen, oxygen isotopes, silica isotopes, U-series, 14C, carbonate chemistry |
Other physical oceanographic measurements | Quantity: number of samples = 52 Description: Filtered water from underway system |
Chemical oceanography | |
Other chemical oceanographic measurements | Quantity: number of samples = 30 Description: Niskin water sample collected with Megacore deployments |
Biology and fisheries | |
Zoobenthos | Quantity: number of deployments = 19 Description: ROV deployments. One aborted, the rest successful. Video, Digital stills, push cores, water samples, CTD data, sediment cores, benthic litter, seafloor fauna (live and fossil) |
Other biological/fisheries measurement | Quantity: number of deployments = 19 Description: ROV deployments. One aborted, the rest successful. Video, Digital stills, push cores, water samples, CTD data, sediment cores, benthic litter, seafloor fauna (live and fossil) |
Geology and geophysics | |
Dredge | Quantity: number of deployments = 1 Description: Benthic fauna and fossil corals. |
Core - soft bottom | Quantity: number of deployments = 19 Description: ROV deployments. One aborted, the rest successful. Video, Digital stills, push cores, water samples, CTD data, sediment cores, benthic litter, seafloor fauna (live and fossil) |
Core - soft bottom | Quantity: number of cores = 7 Description: Gravity cores |
Core - soft bottom | Quantity: number of cores = 30 Description: Individual Mega cores recovered. |
Core - soft bottom | Quantity: number of cores = 1 Description: Box core recovered |
Core - soft bottom | Quantity: number of cores = 1 Description: Piston core (+ 1 trigger core) |
Bottom photography | Quantity: number of deployments = 19 Description: ROV deployments. One aborted, the rest successful. Video, Digital stills, push cores, water samples, CTD data, sediment cores, benthic litter, seafloor fauna (live and fossil) |
Multi-beam echosounding | Quantity: survey square kilometres = 7575 Description: EM120 Multibeam data for bathymetry and habitat mapping |