Resources

RRS Discovery D241

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD241
Cruise period1999-06-04 — 1999-07-01
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnSouthampton, United Kingdom
PurposeResearch
Objectives1. Characterisation of the plankton communities (algae, bacteria, virus, microzooplankton, mesozooplankton) associated with the developing bloom and addressing the role of the individual components in biogeochemical synthesis of DMA and related compounds.
2. Determination of the temporal changes in physical, optical, chemical and biological parameters that affect the progression of the coccolithophore bloom.
3. Quantification of DMSPp, DMSPd, DMS, and DMSO and their production, consumption and transformation processes during the bloom.
4. Generation of data for testing DMS biogeochemistry models and the models of microzooplankton trophodynamics in DMS generation within the bloom.
Chief scientistPeter H Burkill (Plymouth Marine Laboratory)
Cruise reportRRS Discovery D241 cruise report d241.pdf (1.55 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorth Sea
Track chartsRRS Discovery D241 cruise track — d241track.pdf (0.03 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Description: Surface temperature, salinity and fluorescence periodically plotted in near real time as an aid to detection of the bloom.
BathythermographQuantity: number of profiles = 94
Description: XBT's
CTD stationsQuantity: number of profiles = 71
Current profiler (eg ADCP)Description: Hull-mounted ADCP used to record data throughout the cruise.
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: Surface temperature, salinity and fluorescence periodically plotted in near real time as an aid to detection of the bloom.
Data held at BODC Get data
Discrete samples 
73  CTD frame plus rosette samplerPhytoplankton growth
Dissolved total and organic nitrogen concentrations in the water column
Ammonium and ammonia concentration parameters in water bodies
Nitrification rate in the water column
Phytoplankton taxonomic biomass in water bodies
Phytoplankton generic biomass in water bodies
Raw suspended particulate material concentration sensor output
Zooplankton taxonomy-related abundance per unit volume of the water column
Particulate total and organic carbon concentrations in the water column
Organic sulphur compound dynamics in the water column
Oxygen production and respiration in the water column
Particulate total and organic nitrogen concentrations in the water column
Density of the water column
Visible waveband radiance and irradiance measurements in the water column
Radioactivity in water bodies
Transmittance and attenuance of the water column
Bacteria generic abundance in water bodies
Organosulphur and organoselenium species concentration parameters in water bodies
Microzooplankton taxonomy-related biomass expressed as carbon per unit volume of the water column
Primary production in the water column
Metadata parameters
Bacterial production in the water column
Water body released tracers
Chlorophyll pigment concentrations in water bodies
Dissolved organic carbon uptake and production in the water column
Phytoplankton taxonomic abundance in water bodies
Silicate concentration parameters in the water column
Other halocarbon concentrations in water bodies
Raw fluorometer output
Salinity of the water column
Virus abundance in water bodies
Dissolved organic carbon concentration in the water column
Zooplankton non taxonomy-related abundance per unit volume of the water column
Plankton abundance per unit volume of the water column
Temperature of the water column
Bacteria non taxonomy-related biomass expressed as protein per unit volume of the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Raw light meter output
Microzooplankton grazing
Nitrate concentration parameters in the water column
Phosphate concentration parameters in the water column
Phytoplankton generic abundance in water bodies
Dissolved inorganic carbon production and respiration in the water column
Zooplankton taxonomy-related biomass expressed as carbon per unit volume of the water column
Regenerated production in water bodies
Plankton biomass expressed as carbon per unit volume of the water column
Dissolved oxygen parameters in the water column
Microzooplankton taxonomic abundance in water bodies
Nitrite concentration parameters in the water column
New production in water bodies
3  Drifting Buoy
94  Expendable BathythermographTemperature of the water column
2  Instrument mooring
2  Manual water sample taken using Z-boat away from mother shipOrganosulphur and organoselenium species concentration parameters in water bodies
299  Sample taken from ship's non-toxic supplyOrganic sulphur compound dynamics in the water column
Oxygen production and respiration in the water column
Bacteria generic abundance in water bodies
Organosulphur and organoselenium species concentration parameters in water bodies
Chlorophyll pigment concentrations in water bodies
Salinity of the water column
Bacteria non taxonomy-related biomass expressed as protein per unit volume of the water column
Carotenoid and flavenoid pigment concentrations in water bodies
3335  Shipborne Acoustic Doppler Current Profile
10  WP-2 zooplankton netZooplankton taxonomy-related abundance per unit volume of the water column
Stomach and gut contents
Zooplankton taxonomy-related biomass expressed as carbon per unit volume of the water column