CTD profile data collected from the Clarion-Clipperton Zone (CCZ), Pacific Ocean during SMARTEX project expeditions JC241 (2023) and JC257 (2024)

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Marine Environmental Data & Information Network
Last updated:
18 March 2026
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Not added
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Summary

Full-depth CTD profiles collected during RRS James Cook cruises JC241 and JC257 in the Clarion-Clipperton Zone (CCZ), northern equatorial Pacific Ocean, an area likely to be targeted for deep-sea mining for polymetallic nodules in 2023 (JC241) and 2024 (JC257). A Sea-Bird 911plus CTD system was used, mounted on a 24-way stainless steel rosette frame, equipped with 12 x 10-litre Niskin bottles. Too few salinity samples were collected for statistics and verification of sensor trends, therefore none were applied. Post-cruise calibration revealed a 0.00193 deg C positive offset of the temp2 (secondary) temperature sensor; this correction was applied in the final files. Scientific objectives: 1. OMCO 1979 experimental site to estimate mining impact on seabed habitats after 40 years; 2. UK-1 site to understand seasonal changes in seafloor currents and benthic boundary layer processes; 3. Mesoscale eddy structure investigation on the approach to UK1. The data were collected by scientists from the National Oceanography Centre, Southampton, UK, as part of the NERC-funded Seabed Mining And Resilience To EXperimental impact (SMARTEX) project (NE/T003537/1).

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Link to the data Format File added Data preview
Published dataset - doi:10.5285/3ff25347-f73c-e72b-e063-7086abc0b75b N/A 18 March 2026 Not available

Additional information

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Added to data.gov.uk
2026-03-13
Access contraints
Data are freely available to all following agreement to the terms and conditions of a Data Licence
Harvest GUID
bccb438e93d05b37b3b97de7abb1a4d2
Extent
Latitude: 13.9006° to °
Longitude: -126.2227° to -104.7101°
Spatial reference system
Dataset reference date
2026-03-13 (publication)
2025-10-03 (creation)
2026-03-13 (revision)
Frequency of update
asNeeded
Responsible party
Scottish Association for Marine Science (owner, originator); British Oceanographic Data Centre (custodian, distributor)
ISO 19139 resource type
dataset
Metadata language
eng
Source Metadata
XML
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