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BODC Cruise Metadata Report for RRS Challenger (74CH) cruise CH121C

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information

Long name RRS Challenger (74CH) cruise CH121C
Short name CH121C
Objectives and Narrative CH121 was the second of six cruises under the LOIS Shelf Edge Study (SES) aimed at defining the nature of the processes occurring at the shelf edge, their seasonal variability and their impact on the fluxes of nutrients and carbon across the shelf and into the seabed sediments through the shelf.
The cruise was divided into three legs with the first and third being principally directed to the deployment and recovery of an extensive mooring array and the acquisition of sediment cores from selected sites in the SES area. The second leg had a series of objectives concerned with measuring the water column structure and velocity field in the shelf edge regime. To complement the time series data from the moored array of current meters and thermistor chains, the cruise plan called for measurements by shipboard adcp and CTD together to help identify the motions associated with internal tides and waves. These motions, which are generated at the shelf edge, may contribute to turbulent mixing and dissipation and the distribution of the latter was to be investigated with the aid of the FLY free-fall turbulence probe which was to be investigated. More wide-ranging spatial measurements were required to demonstrate the continuity of the slope current and to investigate its cross slope structure.
While this cruise was principally concerned with the physics of the shelf edge system, the programme was also designed to obtain an extensive set of measurements of chlorophyll a, primary production and nutrient concentrations in parallel with physical observations. A further goal was to acquire surficial sediment material from a number of sites down the slope.
Ship RRS Challenger
Departure Port Mallaig, United Kingdom
Departure Date 1995-09-01
Arrival Port Southampton, United Kingdom
Arrival Date 1995-09-10
Principal Scientist(s) John H Simpson (University of Wales, Bangor School of Ocean Sciences)
Responsible Organisation Chelsea College London Department of Geology, USC-EOS
Associated Project(s) LOIS - SES
IHB Sea Areas Visited North East Atlantic Ocean (limit 40W)
Marsden Squares Visited 181;4
Work Area Description NE Atlantic, Malin Shelf Break (60nm west of Hebrides)
Work Area Bounding Polygon 55N,10W; 60N,10W; 60N,5W; 55N,5W; 55N,10W
Southern Limit 55N
Northern Limit 60N
Western Limit 10W
Eastern Limit 5W

Cruise Inventory Datasets

Physical oceanography  
CTD stations Quantity: number of profiles = 32
Description: CTD plus transmissometer,fluorometer,O2 sensors,PAR sensors  
Current meters Quantity: number of recoveries = 7
Description:  
Current profiler (eg ADCP) Quantity: track kilometres = 500
Description: shipborne ADCP  
Optics (eg underwater light levels) Quantity: track kilometres = 500
Description: surface underway measurements  
Optics (eg underwater light levels) Quantity: number of profiles = 32
Description: on CTD  
Surface measurements underway (T,S) Quantity: track kilometres = 500
Description: surface underway measurements  
Transparency (eg transmissometer) Quantity: track kilometres = 500
Description: surface underway measurements  
Transparency (eg transmissometer) Quantity: number of profiles = 32
Description: on CTD  
Chemical oceanography  
Oxygen Quantity: number of profiles = 32
Description: on CTD  
Contamination  
Suspended matter Quantity: number of samples = 42
Description: 2 sediment traps deployed at 56 43.5N, 9 24.3W (redeployed)  
Biology and fisheries  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of profiles = 32
Description: on CTD  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of samples = 64
Description: bottle samples for chlorophyll determination  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: track kilometres = 500
Description: surface underway measurements  
Geology and geophysics  
Core - soft bottom Quantity: number of deployments = 9
Description: 8 multi- & 1 Sholkovitz core for bio- & geochemical analysis  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
56° 27' N 9° 3' W Current meters S400 site recovered, ADCP and STABLE
56° 43' N 9° 24' W Current meters Site N1500 recovered, current meter/transmissometer, sediment trapr
56° 37' N 9° 1' W Current meters Site N300 recovered
56° 27' N 8° 57' W Current meters Site S140, deployed
56° 27' N 9° 3' W Current meters Site S300, recovered, redeployed- and lost a few days later
56° 27' N 9° 4' W Current meters Site S400, recover/redeploy pop-up ADCP, recover pop-up current meter
56° 28' N 9° 9' W Current meters Site S700, recovered
56° 27' N 8° 58' W Other physical oceanographic measurements acoustic study of bubble entrapment (ARIES II) recovery
56° 28' N 8° 52' W Phytoplankton pigs (eg chlorophyll, fluorescence) toroid buoy with nitrate analysers and fluorometers
56° 30' N 9° 2' W Phytoplankton pigs (eg chlorophyll, fluorescence) toroid buoy with nitrate analysers and fluorometers
56° 27' N 9° 7' W Surface drifters/drifting buoys subsurface drogue (surface/subsurface temperature), deployed

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
1 Accelerometer-waverider buoy Date and time
Wave height and period statistics
2 Acoustic doppler current profiler Date and time
Horizontal velocity of the water column (currents)
Metadata parameters
Vertical spatial coordinates
Vertical velocity of the water column (currents)
25 Bottle station Chlorophyll pigment concentrations in water bodies
Phaeopigment concentrations in the water column
Quality control flags
Reference numbers
Vertical spatial coordinates
1 Bottom pressure sensor tide gauge Date and time
Sea level
Temperature of the water column
31 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates
Visible waveband radiance and irradiance measurements in the water column
1 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates
1 Fluorometers Chlorophyll pigment concentrations in water bodies
Date and time
Raw fluorometer output
1 Paddle wheel current meter Date and time
Electrical conductivity of the water column
Horizontal velocity of the water column (currents)
Moored instrument depth
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
3 Paddle wheel current meter Date and time
Electrical conductivity of the water column
Horizontal velocity of the water column (currents)
Moored instrument depth
Salinity of the water column
Temperature of the water column
1 Pumped water sample Chlorophyll pigment concentrations in water bodies
Date and time
Horizontal spatial co-ordinates
Phaeopigment concentrations in the water column
3 Thermistor chain Date and time
Temperature of the water column
Vertical spatial coordinates
1 Transmissometer Date and time
Electrical conductivity of the water column
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

Full List

BODC Reference Instrument Description Date/Time Location  
431365 Paddle wheel current meter 1995-09-03 11:15Z to 1995-09-05 23:15Z 56° 27' N, 9° 3' W Click for more
431433 Paddle wheel current meter 1995-09-03 11:15Z to 1995-09-05 23:15Z 56° 27' N, 9° 3' W Click for more
436197 Paddle wheel current meter 1995-09-02 09:15Z to 1995-11-19 12:15Z 56° 27' N, 8° 57' W Click for more
439379 Paddle wheel current meter 1995-09-02 08:44Z to 1995-11-19 12:14Z 56° 27' N, 8° 57' W Click for more
439515 Thermistor chain 1995-09-02 09:00Z to 1995-11-19 12:00Z 56° 27' N, 8° 57' W Click for more
439540 Thermistor chain 1995-09-03 11:30Z to 1995-09-05 23:00Z 56° 27' N, 9° 3' W Click for more
439748 Thermistor chain 1995-09-03 11:30Z to 1995-09-05 23:00Z 56° 27' N, 9° 3' W Click for more
442640 Bottom pressure sensor tide gauge 1995-09-04 18:30Z to 1995-11-19 09:30Z 56° 27' N, 8° 58' W Click for more
444197 Acoustic doppler current profiler 1995-09-04 18:34Z to 1995-11-19 09:05Z 56° 27' N, 8° 58' W Click for more
444253 Acoustic doppler current profiler 1995-09-06 07:55Z to 1995-11-27 08:15Z 56° 27' N, 9° 4' W Click for more
476083 Fluorometers 1995-09-04 17:02Z to 1995-11-24 02:02Z 56° 28' N, 8° 57' W Click for more
496139 Transmissometer 1995-09-04 16:12Z to 1995-11-27 11:27Z 56° 28' N, 8° 57' W Click for more
507815 Accelerometer-waverider buoy 1995-09-05 18:00Z to 1995-11-07 06:00Z 56° 27' N, 8° 58' W Click for more
851856 CTD/STD cast 1995-09-01 19:03Z 56° 49' N, 6° 39' W Click for more
851868 CTD/STD cast 1995-09-02 08:59Z 56° 28' N, 8° 58' W Click for more
851881 CTD/STD cast 1995-09-02 12:12Z 56° 28' N, 9° 4' W Click for more
851893 CTD/STD cast 1995-09-02 14:11Z 56° 37' N, 9° 1' W Click for more
851900 CTD/STD cast 1995-09-02 20:01Z 56° 28' N, 9° 9' W Click for more
851912 CTD/STD cast 1995-09-03 02:34Z 56° 27' N, 9° 18' W Click for more
851924 CTD/STD cast 1995-09-03 13:29Z 56° 28' N, 9° 7' W Click for more
851936 CTD/STD cast 1995-09-03 21:40Z 56° 30' N, 9° 2' W Click for more
851948 CTD/STD cast 1995-09-03 22:18Z 56° 30' N, 9° 3' W Click for more
851961 CTD/STD cast 1995-09-03 23:13Z 56° 30' N, 9° 7' W Click for more
851973 CTD/STD cast 1995-09-04 01:21Z 56° 31' N, 9° 18' W Click for more
851985 CTD/STD cast 1995-09-04 07:29Z 56° 43' N, 9° 25' W Click for more
851997 CTD/STD cast 1995-09-04 20:42Z 56° 31' N, 9° 18' W Click for more
852000 CTD/STD cast 1995-09-05 02:18Z 56° 39' N, 9° 6' W Click for more
852012 CTD/STD cast 1995-09-05 08:33Z 56° 42' N, 9° 25' W Click for more
852024 CTD/STD cast 1995-09-06 01:13Z 56° 27' N, 9° 39' W Click for more
852036 CTD/STD cast 1995-09-06 23:37Z 56° 36' N, 8° 55' W Click for more
852048 CTD/STD cast 1995-09-07 00:16Z 56° 37' N, 9° 0' W Click for more
852061 CTD/STD cast 1995-09-07 02:17Z 56° 37' N, 9° 1' W Click for more
852073 CTD/STD cast 1995-09-07 04:04Z 56° 33' N, 9° 0' W Click for more
852085 CTD/STD cast 1995-09-07 04:37Z 56° 34' N, 9° 3' W Click for more
852097 CTD/STD cast 1995-09-07 13:04Z 56° 34' N, 9° 6' W Click for more
852104 CTD/STD cast 1995-09-02 17:07Z 56° 27' N, 9° 4' W Click for more
852116 CTD/STD cast 1995-09-03 07:27Z 56° 27' N, 9° 3' W Click for more
852128 CTD/STD cast 1995-09-03 20:42Z 56° 30' N, 8° 55' W Click for more
852141 CTD/STD cast 1995-09-04 00:07Z 56° 31' N, 9° 10' W Click for more
852153 CTD/STD cast 1995-09-05 03:20Z 56° 40' N, 9° 12' W Click for more
852165 CTD/STD cast 1995-09-06 05:10Z 56° 36' N, 9° 17' W Click for more
852177 CTD/STD cast 1995-09-07 02:53Z 56° 38' N, 9° 4' W Click for more
852189 CTD/STD cast 1995-09-07 05:15Z 56° 33' N, 9° 1' W Click for more
852190 CTD/STD cast 1995-09-03 19:24Z 56° 27' N, 9° 2' W Click for more
852208 CTD/STD cast 1995-09-04 15:35Z 56° 27' N, 8° 57' W Click for more
1678538 Pumped water sample 1995-09-02 08:42Z to 1995-09-07 07:30Z 56° 27' N to 56° 43' N; 9° 25' W to 8° 55' W Click for more
1687401 Bottle station 1995-09-02 09:14Z 56° 28' N, 8° 58' W Click for more
1687413 Bottle station 1995-09-02 14:23Z 56° 37' N, 9° 1' W Click for more
1687425 Bottle station 1995-09-02 17:15Z 56° 27' N, 9° 4' W Click for more
1687437 Bottle station 1995-09-03 02:59Z 56° 27' N, 9° 18' W Click for more
1687449 Bottle station 1995-09-03 07:41Z 56° 27' N, 9° 3' W Click for more
1687450 Bottle station 1995-09-03 13:43Z 56° 28' N, 9° 7' W Click for more
1687462 Bottle station 1995-09-03 19:35Z 56° 27' N, 9° 2' W Click for more
1687474 Bottle station 1995-09-03 20:49Z 56° 30' N, 8° 55' W Click for more
1687486 Bottle station 1995-09-03 21:45Z 56° 30' N, 9° 2' W Click for more
1687498 Bottle station 1995-09-03 22:29Z 56° 30' N, 9° 3' W Click for more
1687505 Bottle station 1995-09-03 23:27Z 56° 30' N, 9° 7' W Click for more
1687517 Bottle station 1995-09-04 00:29Z 56° 31' N, 9° 10' W Click for more
1687529 Bottle station 1995-09-04 01:49Z 56° 31' N, 9° 18' W Click for more
1687530 Bottle station 1995-09-04 08:01Z 56° 43' N, 9° 25' W Click for more
1687542 Bottle station 1995-09-04 15:44Z 56° 27' N, 8° 57' W Click for more
1687554 Bottle station 1995-09-05 02:34Z 56° 39' N, 9° 6' W Click for more
1687566 Bottle station 1995-09-05 03:44Z 56° 40' N, 9° 12' W Click for more
1687578 Bottle station 1995-09-05 09:02Z 56° 42' N, 9° 25' W Click for more
1687591 Bottle station 1995-09-06 01:40Z 56° 27' N, 9° 39' W Click for more
1687609 Bottle station 1995-09-06 05:33Z 56° 36' N, 9° 17' W Click for more
1687610 Bottle station 1995-09-07 00:24Z 56° 37' N, 9° 0' W Click for more
1687622 Bottle station 1995-09-07 02:25Z 56° 37' N, 9° 1' W Click for more
1687634 Bottle station 1995-09-07 03:10Z 56° 38' N, 9° 4' W Click for more
1687646 Bottle station 1995-09-07 04:47Z 56° 34' N, 9° 3' W Click for more
1687658 Bottle station 1995-09-07 05:21Z 56° 33' N, 9° 1' W Click for more

Project Database

# Events Gear Type Parameters Held
30 Sample taken from ship's non-toxic supply Chlorophyll pigment concentrations in water bodies
Salinity of the water column
Phaeopigment concentrations in the water column
32 CTD frame plus rosette sampler Particulate total and organic carbon concentrations in the water column
Particulate total and organic nitrogen concentrations in the water column
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies
Salinity of the water column
Temperature of the water column
Phaeopigment concentrations in the water column
7 Instrument mooring
Carbon concentrations in suspended particulate material
Sedimentation flux of carbon, nitrogen or organic matter in the water column
Concentration of silicon species in suspended particulate material
Sedimentation flux of non-metallic inorganic species in the water column
Nitrogen concentrations in suspended particulate material
Other physical and chemical properties of suspended particulate material
Sedimentation flux quantification in the water column
1 Sholkovitz Gravity Corer
1 Drifting Buoy
8 Multicorer
Stable isotopes in sediment
Sediment water content, porosity and surface area
Other fluxes between the bed and the water column
Concentration of organic matter in sediments
Concentration of inorganic sulphur species in sediment
605 Shipborne Acoustic Doppler Current Profile

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

References

Track Charts

Track Chart

Reports

Cruise Report