Cruise inventory

RRS Challenger CH106

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH106
Cruise period1993-09-18 — 1993-09-28
StatusCompleted
Port of departureArdrossan, United Kingdom
Port of returnBarry, United Kingdom
PurposeResearch
ObjectivesStudy of flow through North Channel of Irish Sea. (EC-Ref# 930918.0136)
1. To deploy 12 moorings at 6 sites in the North Channel and to service a long term Acoustic Doppler Current Profiler (ADCP).
2. To obtain CTD, nutrient and ship ADCP measurements in the North Channel.
3. To recover 7 Argos/Decca drogued buoys deployed on Challenger 105.
4. To service an ADCP and a current meter/transmissonmeter mooring off Cumbria.
5. To deploy 2 ADCP's and recover 1 of them on the Clyde sill (for Menai Bridge).
6. To deploy and recover trial 75kHz and 1MHz ADCP's.
Chief scientistM John Howarth (Proudman Oceanographic Laboratory)
ProjectPROFILE 2
Coordinating bodyMAST II-0054/EC
Cruise reportRRS Challenger CH106 cruise report ch106and107_93.pdf — access key 'C' (0.39 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
Irish Sea and St. George's Channel
SpecificIrish Sea, North Channel
Track chartsRRS Challenger CH106 cruise track — trk3947.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 10
Description: continuous thermosalinograph
CTD stationsQuantity: number of profiles = 95
Transparency (eg transmissometer)Quantity: number of profiles = 95
Current profiler (eg ADCP)Quantity: activity duration in days = 10
Description: underway shipborne ADCP
Surface drifters/drifting buoysQuantity: number of deployments = 6
Description: tracks from 6 Decca/Argos buoys drogued at 30m over 10d in N. Channel
Chemical oceanography 
PhosphateQuantity: number of profiles = 95
NitrateQuantity: number of profiles = 95
NitriteQuantity: number of profiles = 95
AmmoniaQuantity: number of profiles = 95
SilicateQuantity: number of profiles = 95
Moorings, landers, buoys 
Physical oceanography 
Subsurface temperature measurements54° 40' 0" N  5° 15' 0" W — thermistor chain deployed - lost
Subsurface temperature measurements54° 46' 0" N  5° 25' 0" W — thermistor chain deployed and recovered
Transparency (eg transmissometer)54° 7' 0" N  3° 27' 0" W — Transmissometer (2) recovered and deployed
Current meters54° 46' 0" N  5° 25' 0" W — current meter deployed and recovered
Current meters54° 46' 0" N  5° 28' 0" W — current meter and moored ADCP deployed
Current meters54° 46' 59" N  5° 16' 59" W — current meter rig deployed (4 meters), recovered by fishing vessel 29 Oct 93
Current meters54° 7' 0" N  3° 27' 0" W — Current meter (2) recovered and deployed
Current profiler (eg ADCP)54° 52' 0" N  5° 12' 0" W — ADCP deployed; current meter rig deployed and recovered
Current profiler (eg ADCP)55° 22' 0" N  5° 25' 59" W — ADCP deployed
Current profiler (eg ADCP)54° 7' 0" N  3° 27' 0" W — ADCP recovered and deployed
Current profiler (eg ADCP)55° 0' 0" N  5° 30' 0" W — ADCP deployed
Current profiler (eg ADCP)54° 46' 0" N  5° 24' 0" W — ADCP and pressure recorder recovered and deployed
Sea level (inc. bot. press., inverted echosounder)55° 0' 0" N  5° 30' 0" W — Pressure recorder, with ADCP above, deployed
Instrumented wave measurements54° 46' 0" N  5° 25' 0" W — Wave rider deployed - lost
Meteorology 
Other meteorological measurements54° 46' 0" N  5° 25' 0" W — Met.buoy deployed
Data held at BODC 
Discrete samples 
95  CTD frame plus rosette samplerDensity of the water column
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Raw fluorometer output
Salinity of the water column
Raw light meter output
Temperature of the water column
7  Sample taken from ship's non-toxic supplySalinity of the water column