BODC Cruise Metadata Report for RRS James Cook (740H) cruise JC109
Introduction
This report collates information from the BODC cruise inventory and oceanographic databases. It presents
- Cruise Inventory Information
- A summary of BODC data holdings for the cruise from the
- References - including cruise tracks and cruise reports
Cruise Inventory Information
| Long name | RRS James Cook (740H) cruise JC109 |
|---|---|
| Short name | JC109 |
| Objectives and Narrative | The primary purpose of this cruise was to recover an array of 25 ocean-bottom seismographs, which had been recording passive micro-seismicity data at the 13° 20'N oceanic core complex on the Mid-Atlantic Ridge since they were deployed during JC102 in April 2014. This array of seismographs was recording local seismic events associated with extension-related slippage on the fault planes that accommodate spreading at this plate boundary. The data will be used to test models of plate accretion at slower spreading rates. This cruise is the second of three: i) passive array deployment; ii) passive array recovery; and iii) active source seismic imaging, coupled with Autosub near-seabed geophysical and oceanographic surveying. This cruise comprised a transit to the work area of ~11.5 days, ~2.25 days of OBS recovery, 3.25 days of swath bathymetry data in-fill in the work area and a transit from the work area of ~5 days - a total of ~22 days. Four days were lost to a delayed departure from Southampton due to rectification works on and recertification of the lifeboats and HMRC custom clearance. Swath bathymetry and gravity data were acquired throughout the transits to/from ports as well as in the study area. |
| Ship | RRS James Cook |
| Departure Port | Southampton, United Kingdom |
| Departure Date | 2014-10-11 |
| Arrival Port | Port of Spain, Trinidad and Tobago |
| Arrival Date | 2014-11-05 |
| Principal Scientist(s) | Christine Peirce (University of Durham, Department of Earth Sciences) |
| Responsible Organisation | University of Durham, Department of Earth Sciences |
| Associated Project(s) | |
| IHB Sea Areas Visited | North West Atlantic Ocean (limit 40W) |
| Marsden Squares Visited | 41/42/43/44 |
| Work Area Description | Mid-Atlantic Ridge |
| Unable to lookup cruise bounds at this time | |
| Work Area Bounding Polygon | |
| Southern Limit | unknown |
| Northern Limit | unknown |
| Western Limit | unknown |
| Eastern Limit | unknown |
Cruise Inventory Datasets
| Geology and geophysics | |
|---|---|
| Geophysical measurements made at depth |
Quantity:
number of stations =
1
Description: Sound velocity measurement from surface to 1000m depth - using dual Valeport Midas sound velocity probes |
| Gravity measurements |
Quantity:
activity duration in days =
22
Description: Gravity - using a LaCoste Romberg sea gravity meter (instrument S-040) |
| Multi-beam echosounding |
Quantity:
activity duration in days =
22
Description: Multibeam bathymetry - using an Kongsberg EM120 in deep mode 191/191 beams, maximum angle 70°/70°, beam width 7000m/7000m in good sea conditions |
| Other geological/geophysical measurements |
Quantity:
activity duration in days =
198
Description: Passive seismicity data - using ocean-bottom seismographs, comprising 3-component geophones and either a hydrophone or differential pressure gauge as sensors |
| Seismic refraction |
Quantity:
number of deployments =
25
Description: Ocean-bottom seismograph (OBS) |
| Single-beam echosounding |
Quantity:
activity duration in days =
22
Description: Single beam bathymetry - using a Kongsberg EA600 12 kHz |
Cruise Inventory Mooring/Buoy Operations
No information on datasets is currently available
Summary of BODC Data Holdings for the Cruise
National Oceanographic Database
Summary
| # Series | Instrument Description | Parameters |
|---|---|---|
| 1 | Meteorological data logger |
Air pressure Air temperature Atmospheric humidity Date and time Horizontal spatial co-ordinates Raw light meter output Reference numbers Solar Radiation Visible waveband radiance and irradiance measurements in the atmosphere Wind strength and direction |
| 1 | Multi-beam echosounder |
Bathymetry and Elevation Date and time Horizontal platform movement Horizontal spatial co-ordinates Platform or instrument orientation Reference numbers |
| 1 | Multiple instrument types |
Chlorophyll pigment concentrations in water bodies Date and time Electrical conductivity of the water column Horizontal spatial co-ordinates Metadata parameters Raw fluorometer output Raw suspended particulate material concentration sensor output Reference numbers Salinity of the water column Temperature of the water column Transmittance and attenuance of the water column |
| 2 | Sound Velocity Probe |
Reference numbers Sound velocity and travel time in the water column Temperature of the water column Vertical spatial coordinates |
Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)
Full List
| BODC Reference | Instrument Description | Date/Time | Location | |
|---|---|---|---|---|
| 1899914 | Sound Velocity Probe | 2014-10-26 19:08Z | 13° 26' N, 44° 53' W | Click for more |
| 1899926 | Sound Velocity Probe | 2014-10-26 19:12Z | 13° 26' N, 44° 53' W | Click for more |
| 2026944 | Multi-beam echosounder | 2014-10-14 17:50Z to 2014-11-05 21:03Z | 10° 36' N to 50° 53' N; 61° 42' W to 1° 17' W | Click for more |
| 2026956 | Meteorological data logger | 2014-10-14 17:50Z to 2014-11-05 21:03Z | 10° 36' N to 50° 53' N; 61° 42' W to 1° 17' W | Click for more |
| 2026968 | Multiple instrument types | 2014-10-14 17:50Z to 2014-11-05 21:03Z | 10° 36' N to 50° 53' N; 61° 42' W to 1° 17' W | Click for more |
Project Database
No data currently held for this cruise in the BODC Project Database
