Cruise inventory

RRS Challenger CH99A

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH99A
Cruise period1993-02-12 — 1993-02-21
StatusCompleted
Port of departureBarry, United Kingdom
Port of returnGreat Yarmouth, United Kingdom
PurposeResearch
ObjectivesTo measure rates of air/sea gas exchange
Chief scientistPhilip D Nightingale (University of East Anglia School of Environmental Sciences)
ProjectEPOCH
Coordinating bodyCEC
Ocean/sea areas 
GeneralEnglish Channel
North Sea
SpecificS North Sea,English Channel,Broad Fourteens
Track chartsRRS Challenger CH99A cruise track — trk3800.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 1200.096
Description: +transmittance
CTD stationsQuantity: number of stations = 11
Description: CTDO + transmittance, fluorometer, irradiance
Transparency (eg transmissometer)Quantity: number of stations = 11
Description: CTDO + transmittance, fluorometer, irradiance
Optics (eg underwater light levels)Quantity: number of stations = 11
Description: CTDO + transmittance, fluorometer, irradiance
Geochemical tracers (eg freons)Quantity: number of profiles = 9
Description: depth profiles for SF6, 3He and B. Globigii spores
Geochemical tracers (eg freons)Quantity: number of samples = 6
Description: surface measurements of SF6, 3He and B. Globigii spores
Current profiler (eg ADCP)Quantity: track kilometres = 1200.096
Description: shipborne ADCP
Instrumented wave measurementsQuantity: activity duration in days = 5
Description: wave height and wave spectra data
Chemical oceanography 
OxygenQuantity: number of stations = 11
Description: CTDO + transmittance, fluorometer, irradiance
PhosphateQuantity: number of samples = 7
Description: surface
NitrateQuantity: number of samples = 7
Description: surface
NitriteQuantity: number of samples = 7
Description: surface
Total - NQuantity: number of stations = 7
Description: nitrogen assimilation, total particulate nitrogen
SilicateQuantity: number of samples = 7
Description: surface
IsotopesQuantity: number of profiles = 9
IsotopesQuantity: number of samples = 6
Contamination 
Other contaminant measurementsQuantity: number of experiments = 3
Description: measurement of surfactant biodegradation rates
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 7
Description: surface chlorophyll
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 11
Description: CTDO + transmittance, fluorometer, irradiance
Particulate organic matter (inc POC, PON)Quantity: number of samples = 7
Description: Total particulate carbon, particulate organic carbon from surface water
Other biological/fisheries measurementQuantity: number of experiments = 3
Description: measurement of surfactant biodegradation rates
Other biological/fisheries measurementQuantity: number of profiles = 9
Description: microbial determination of methane and methane sulphonate
Meteorology 
Routine standard measurementsQuantity: track kilometres = 1111.2
Description: wind speed and direction
Moorings, landers, buoys 
Physical oceanography 
Surface drifters/drifting buoys52° 25' 59" N  4° 0' 0" E — IDB surface drifting buoy, deployed 15 Feb, recovered 20 Feb 1993
Surface drifters/drifting buoys52° 22' 41" N  4° 1' 0" E — IDB surface drifting buoy, deployed 15 Feb, recovered 20 Feb 1993
Instrumented wave measurements52° 19' 0" N  4° 13' 59" E — deployment of waverider buoy, 15 Feb, recovered 20 Feb 1993
Other physical oceanographic measurements52° 19' 0" N  4° 13' 59" E — tracer tank moored to sea floor to prevent contamination of equipment,15-20Feb