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RRS James Clark Ross JR19950320 (JR10)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR19950320 (JR10)
Cruise period1995-03-20 — 1995-05-06
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnRio de Janeiro, Brazil
ObjectivesThis cruise was a part of the One Time Survey of the World Ocean Circulation Experiment (WOCE), desinated A23. A hydrographic section from Antarctica to Brazil in the South West Atlantic.
Chief scientistBrian A King (James Rennell Centre for Ocean Circulation), Karen J Heywood (University of East Anglia School of Environmental Sciences)
ProjectWOCE
Coordinating bodyWOCE International Project Office (IPO)
Cruise reportRRS James Clark Ross JR19950320 (JR10) cruise report jr10.pdf (0.39 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
SpecificSouthern Ocean, area encompassed 20-75degS,20-70degW, Scotia Sea, Weddell Sea
Track chartsRRS James Clark Ross JR19950320 (JR10) cruise track — trk4184.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 48
Description: +B02 Seabird SBE21 thermosalinograph, Turner deesgins fluorometer
BathythermographQuantity: number of profiles = 73
Description: all T7 probes except 1 T5
Water bottle stationsQuantity: number of stations = 127
Description: Rosette multisampler, salinities at each station
CTD stationsQuantity: number of stations = 128
Description: +H16,H21,B02 NBIS MkIIIb CTD with O2 sensor, fluorometer, tranmissometer
Transparency (eg transmissometer)Quantity: number of stations = 128
Description: +H16,H21,B02 NBIS MkIIIb CTD with O2 sensor, fluorometer, tranmissometer
Geochemical tracers (eg freons)Quantity: number of stations = 100
Description: CFC11,12,113 and CCl4
Current profiler (eg ADCP)Quantity: activity duration in days = 48
Description: shipborne ADCP, RDI 150kHz, profiling to 300m
Chemical oceanography 
OxygenQuantity: number of samples = 126
Description: bottle samples
OxygenQuantity: number of stations = 128
Description: +H16,H21,B02 NBIS MkIIIb CTD with O2 sensor, fluorometer, tranmissometer
Carbon dioxideQuantity: number of stations = 24
Description: total inorganic carbon and pCO2
PhosphateQuantity: number of stations = 125
PhosphateQuantity: activity duration in days = 8
Description: +H22,H24,H26,P05,B71,H30 underway sampling, trace metals, Al, nutrients, DIN, DIC, POC, PON, iodine
NitrateQuantity: activity duration in days = 8
Description: +H22,H24,H26,P05,B71,H30 underway sampling, trace metals, Al, nutrients, DIN, DIC, POC, PON, iodine
NitrateQuantity: number of stations = 125
SilicateQuantity: activity duration in days = 8
Description: +H22,H24,H26,P05,B71,H30 underway sampling, trace metals, Al, nutrients, DIN, DIC, POC, PON, iodine
SilicateQuantity: number of stations = 125
Trace elementsQuantity: activity duration in days = 8
Description: +H22,H24,H26,P05,B71,H30 underway sampling, trace metals, Al, nutrients, DIN, DIC, POC, PON, iodine
Trace elementsQuantity: number of stations = 50
Description: helium
Trace elementsQuantity: number of stations = 36
Description: tritium
Trace elementsQuantity: number of stations = 29
Description: iodide
IsotopesQuantity: number of stations = 32
Description: carbon isotopes
IsotopesQuantity: number of stations = 120
Description: oxygen isotopes
Contamination 
Trace metalsQuantity: number of stations = 15
Trace metalsQuantity: activity duration in days = 8
Description: +H22,H24,H26,P05,B71,H30 underway sampling, trace metals, Al, nutrients, DIN, DIC, POC, PON, iodine
Other dissolved substancesQuantity: activity duration in days = 8
Description: +H22,H24,H26,P05,B71,H30 underway sampling, trace metals, Al, nutrients, DIN, DIC, POC, PON, iodine
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 72
Description: samples for chlorophyll
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: activity duration in days = 48
Description: +B02 Seabird SBE21 thermosalinograph, Turner deesgins fluorometer
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 128
Description: +H16,H21,B02 NBIS MkIIIb CTD with O2 sensor, fluorometer, tranmissometer
Particulate organic matter (inc POC, PON)Quantity: activity duration in days = 8
Description: +H22,H24,H26,P05,B71,H30 underway sampling, trace metals, Al, nutrients, DIN, DIC, POC, PON, iodine
Meteorology 
Upper air observationsQuantity: number of profiles = 88
Description: radiosondes
Incident radiationQuantity: number of stations = 38
Description: tethered spectral radiometer buoy depl. at beginning of 38 CTD stations, at 0.5m
Incident radiationQuantity: activity duration in days = 48
Description: SST radiometer
Routine standard measurementsQuantity: activity duration in days = 48
Atmospheric chemistryQuantity: number of samples = 6
Description: water vapour for oxygen, deuterium
Geology and geophysics 
Single-beam echosoundingQuantity: activity duration in days = 48
Description: Simrad EA500
Moorings, landers, buoys 
Physical oceanography 
Neutrally buoyant floats55° 1' 59" S  60° 31' 59" W — ALACE float 800m deployed, pressure, temperature
Neutrally buoyant floats55° 31' 0" S  58° 37' 59" W — deployed ALACE float, 1000m, pressure, temperature
Neutrally buoyant floats52° 1' 59" S  35° 10' 0" W — deployed ALACE float 1000m, pressure, temperature
Neutrally buoyant floats48° 36' 0" S  36° 0' 0" W — deployed ALACE float 1000m, pressure, temperature, salinity
Neutrally buoyant floats44° 52' 0" S  36° 0' 0" W — deployed ALACE float 1000m, pressure, temperature
Neutrally buoyant floats37° 55' 0" S  35° 58' 59" W — deployed ALACE float 1000m, pressure, temperature
Neutrally buoyant floats34° 22' 0" S  36° 0' 0" W — deployed ALACE float 1000m, pressure, temperature
Neutrally buoyant floats30° 1' 0" S  36° 52' 59" W — deployed ALACE float 1000m, pressure, temperature
Neutrally buoyant floats55° 31' 0" S  58° 37' 59" W — deployed ALACE float, 800m, pressure, temperature, salinity
Neutrally buoyant floats41° 31' 59" S  36° 0' 0" W — deployed ALACE float 1000m, pressure, temperature, salinity
Sea level (inc. bot. press., inverted echosounder)32° 0' 0" S  36° 0' 0" W — deployed bottom pressure recorder, 2604m
Data held at BODC Get data
Discrete samples 
128  CTD frame plus rosette samplerTransmittance and attenuance of the water column
Concentration of inorganic halogens in water bodies
Dissolved oxygen parameters in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Temperature of the water column
Stable isotopes in water bodies
Other halocarbon concentrations in water bodies
Dissolved noble gas concentration parameters in the water column
Silicate concentration parameters in the water column
Density of the water column
Chlorofluorocarbon concentrations in the water column
Nitrate concentration parameters in the water column
Phaeopigment concentrations in the water column
Radioactivity in water bodies
Chlorophyll pigment concentrations in water bodies
71  Expendable BathythermographTemperature of the water column
50  Sample taken from ship's non-toxic supplyPhaeopigment concentrations in the water column
Chlorophyll pigment concentrations in water bodies
25986  Shipborne Acoustic Doppler Current Profile