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- 3869
RRS Challenger CH99A
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS Challenger (74CH) |
Cruise identifier | CH99A |
Cruise period | 1993-02-12 — 1993-02-21 |
Status | Completed |
Port of departure | Barry, United Kingdom |
Port of return | Great Yarmouth, United Kingdom |
Purpose | Research |
Objectives | To measure rates of air/sea gas exchange |
Chief scientist | Philip D Nightingale (University of East Anglia School of Environmental Sciences) |
Project | EPOCH |
Coordinating body | CEC |
Ocean/sea areas | |
General | English Channel North Sea |
Specific | S North Sea,English Channel,Broad Fourteens |
Track charts | |
Measurements | |
Physical oceanography | |
Surface measurements underway (T,S) | Quantity: track kilometres = 1200.096 Description: +transmittance |
CTD stations | Quantity: 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 samples = 6 Description: surface measurements of SF6, 3He and B. Globigii spores |
Geochemical tracers (eg freons) | Quantity: number of profiles = 9 Description: depth profiles for SF6, 3He and B. Globigii spores |
Current profiler (eg ADCP) | Quantity: track kilometres = 1200.096 Description: shipborne ADCP |
Instrumented wave measurements | Quantity: activity duration in days = 5 Description: wave height and wave spectra data |
Chemical oceanography | |
Oxygen | Quantity: number of stations = 11 Description: CTDO + transmittance, fluorometer, irradiance |
Phosphate | Quantity: number of samples = 7 Description: surface |
Nitrate | Quantity: number of samples = 7 Description: surface |
Nitrite | Quantity: number of samples = 7 Description: surface |
Total - N | Quantity: number of stations = 7 Description: nitrogen assimilation, total particulate nitrogen |
Silicate | Quantity: number of samples = 7 Description: surface |
Isotopes | Quantity: number of samples = 6 |
Isotopes | Quantity: number of profiles = 9 |
Contamination | |
Other contaminant measurements | Quantity: 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 measurement | Quantity: number of experiments = 3 Description: measurement of surfactant biodegradation rates |
Other biological/fisheries measurement | Quantity: number of profiles = 9 Description: microbial determination of methane and methane sulphonate |
Meteorology | |
Routine standard measurements | Quantity: track kilometres = 1111.2 Description: wind speed and direction |
Moorings, landers, buoys | |
Physical oceanography | |
Surface drifters/drifting buoys | 52° 25' 59" N 4° 0' 0" E — IDB surface drifting buoy, deployed 15 Feb, recovered 20 Feb 1993 |
Surface drifters/drifting buoys | 52° 22' 41" N 4° 1' 0" E — IDB surface drifting buoy, deployed 15 Feb, recovered 20 Feb 1993 |
Instrumented wave measurements | 52° 19' 0" N 4° 13' 59" E — deployment of waverider buoy, 15 Feb, recovered 20 Feb 1993 |
Other physical oceanographic measurements | 52° 19' 0" N 4° 13' 59" E — tracer tank moored to sea floor to prevent contamination of equipment,15-20Feb |