Cruise inventory

RRS Discovery D203B

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD203B
Cruise period1993-07-17 — 1993-08-02
StatusCompleted
Port of departureNice, France
Port of returnNice, France
PurposeResearch
Objectives1) To investigate the biochemical cycling of the bio-essential elements of carbon, nitrogen and phosphorus along the radial gradients from the Eutrophic plume of the River Rhone, to the Oligographic gyre of the Belearic Basin
2) The chemical oceanography of biogases including oxygen, hydrogen peroxide , methylamines and dimethylsulphide were obtained using chemiluminescence, fluorescence, and ion chromatographic techniques
3) In situ primary production experiments were conducted with N-15, C-14 isotopes, together with precision O2 measurements in order to measure the balance between new production and regenerated production.
4) An in situ incubation/inoculation rig was deployed on 3 occasions in an intercalibration of production measurements
5) The inventories, river fluxes, and molecular weight distribution of dissolved organic carbon (DOC) were determined
Chief scientistR Fauzi C Mantoura (Plymouth Marine Laboratory)
ProjectEROS 2000 MAST
Coordinating bodyDG XII, European Community, Environment Programme
Cruise reportRRS Discovery D203B cruise report d203.pdf — access key 'C' (11.93 MB) 
Ocean/sea areas 
GeneralMediterranean Sea - Western basin
SpecificWest and north west Mediterranean Sea, Gibraltar Straits, Sicily Straits, Gulf du Lions
Track chartsRRS Discovery D203B cruise track — d203trk.pdf (00 MB) 
Measurements 
Physical oceanography 
CTD stationsQuantity: number of profiles = 86
Description: CTD frame with fluorometer, transmissometer and light meters
Transparency (eg transmissometer)Quantity: number of profiles = 86
Description: CTD frame with fluorometer, transmissometer and light meters
Optics (eg underwater light levels)Quantity: number of profiles = 86
Description: CTD frame with fluorometer, transmissometer and light meters
Other physical oceanographic measurementsQuantity: number of measurements = 16
Description: U.O.R tows, 11 profiles on CTD frame and 8 in Rhone estuary
Chemical oceanography 
OxygenQuantity: number of profiles = 86
Description: CTD frame with fluorometer, transmissometer and light meters
PhosphateQuantity: number of samples = 584
Description: nutrient measurements
PhosphateQuantity: number of stations = 25
Description: investigate distribution
NitrateQuantity: number of samples = 584
Description: nutrient measurements
NitrateQuantity: number of stations = 25
Description: investigate distribution
NitriteQuantity: number of stations = 25
Description: investigate distribution
AmmoniaDescription: analysis of ammonia and methylamines
AmmoniaQuantity: number of stations = 25
Description: investigate distribution
SilicateQuantity: number of samples = 584
Description: nutrient measurements
SilicateQuantity: number of stations = 25
Description: investigate distribution
RadioactivityQuantity: number of profiles = 2
Description: 8 depths profile for particulate and dissolved radionuclides
Other chemical oceanographic measurementsQuantity: number of stations = 2
Description: vertical flux of biogenic particles
Other chemical oceanographic measurementsQuantity: number of profiles = 4
Description: particulate silica
Other chemical oceanographic measurementsDescription: H2O2 analysis of samples from CTD casts
Contamination 
Other contaminant measurementsDescription: organic pollutants and biomakers
Biology and fisheries 
Primary productivityQuantity: number of profiles = 4
Description: carbon
Primary productivityQuantity: number of stations = 7
Primary productivityQuantity: number of stations = 7
Description: measurement of primary production by 14C
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 4
Description: total chlorophyll
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 86
Description: CTD frame with fluorometer, transmissometer and light meters
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 50
Description: biochemistry
Particulate organic matter (inc POC, PON)Description: particulate organic nitrogen and phosphorus
Dissolved organic matter (inc DOC)Quantity: number of stations = 48
Description: samples taken for dissolved organic carbon
Biochemical measurements (eg lipids, amino acids)Quantity: number of stations = 34
Description: amino acids
Biochemical measurements (eg lipids, amino acids)Description: water column particulate biochemistry
PhytoplanktonDescription: distribution of photosynthetic picoplanktonic cells
Other biological/fisheries measurementQuantity: number of experiments = 15
Description: measure the rates of nitrogen assimilation by phytoplankton in a range of environments
Data held at BODC 
Discrete samples 
86  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
Chlorophyll pigment concentrations in water bodies
Raw fluorometer output
Salinity of the water column
Raw light meter output
Temperature of the water column
Dissolved oxygen parameters in the water column