Cruise inventory

RRS Challenger CH148

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH148
Cruise period1999-09-16 — 1999-09-27
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnSouthampton, United Kingdom
PurposeResearch
ObjectivesCCMS - IMPACT is a multidisciplinary programme designed to understand contaminant behaviour in the environment in order that toxic effects may be predicted. This cruise provides a platform for the first major study within "IMPACT". Cruise objectives are to:
1. Study dissipation/diffusion, degradation and cycling of contaminants from the Humber.
2. Measure the impact of pollutants (organic and inorganic) arising from UK land-based sources.
3. Study the remobilisation of contaminants from sediments from the Dogger bank.
4. Study transport processes and provide ADCP data for high resolution modelling of fronts.
5. Measure speciation and bioavailability of contaminants.

Main tasks:
1. To sample water and sediment to quantify and budget critically selected organic compounds (pesticides, herbicides, antifouling booster biocides, PCBs, PAHs etc.).
2. Analyse discrete water samples on-board ship for dissolved Co (inorganic/ organic), Fe, Mn, Cr and V.
3. Examine the phase association of trace metals on the surface and sub surface samples to near bed.
4. In the case of Fe and Cr, investigate their dissolved redox speciation (Fe(II)/ Fe(III) and Cr(III)/Cr(VI)).
5. Determine particulate trace metal concentrations.
6. Measure dissolved nutrient concentrations.
7. Collect ADCP data for the high resolution modelling study of fronts.
8. Evaluate the use of mussel embryo-larvae as a means of determing water quality.
9. Implement the cellular biomarker techniques for the determination of toxicity.
10. Determine the concentrations of chemical contaminants in the microlayer, bulkwater, sediment elutriates and their relation with toxicity.
11. Address the integrated biological effects of complex mixtures along a pollution gradient.
Chief scientistTim Fileman (Plymouth Marine Laboratory)
ProjectIMPACT
Coordinating bodyCCMS - NERC
Ocean/sea areas 
GeneralNorth Sea
SpecificHumber estuary, Wash, Dogger Bank, Flamborough front, southern North Sea
Track chartsRRS Challenger CH148 cruise track — trk4385.html
Measurements 
Physical oceanography 
CTD stationsQuantity: number of stations = 34
Description: Casts using CTD with oxygen, salinity, temperature, fluorescence, transmittance, up-light, down-light
Subsurface temperature and salinity measurementsQuantity: track kilometres = 2383
Description: Underway measurements of salinity, temperature, fluorescence, transmittance, from non-toxic
Current profiler (eg ADCP)Quantity: track kilometres = 2383
Description: Underway current profiling using VMADCP
Chemical oceanography 
PhosphateQuantity: number of stations = 34
Description: General oceanics multisampler/ CTD 10 litre Niskin bottles, vertical profiles - samples analysed by autoanalyser on board
NitrateQuantity: number of stations = 34
Description: General oceanics multisampler/ CTD 10 litre Niskin bottles, vertical profiles - samples analysed by autoanalyser on board
NitriteQuantity: number of stations = 34
Description: General oceanics multisampler/ CTD 10 litre Niskin bottles, vertical profiles - samples analysed by autoanalyser on board
Total - NQuantity: number of stations = 34
Description: Modified lever action Niskin bottles on CTD for determination of dissolved, Fe, Co, Cr, U, Mo, V and total oxidised nitrogen (nitrate and nitrite) - samples taken at 3 or 4 depths per profile - determinations made on board by flow injection chemiluminescence, submersible flow injection and adsorptive cathodic stripping voltametry (AdCSV)
SilicateQuantity: number of stations = 34
Description: General oceanics multisampler/ CTD 10 litre Niskin bottles, vertical profiles - samples analysed by autoanalyser on board
Contamination 
Suspended matterQuantity: number of stations = 2
Description: Sea surface microlayer sampler for ecotoxicological measurements combined with organics and particulate metal determinations
Suspended matterQuantity: number of stations = 34
Description: Dissolved and particulate organic contaminants sampled by hand-held bottle sampler and extracted by liquid/liquid extraction for bulk "What's There" determination by GC/MS
Trace metalsQuantity: number of stations = 34
Description: Modified lever action Niskin bottles on CTD for determination of dissolved, Fe, Co, Cr, U, Mo, V and total oxidised nitrogen (nitrate and nitrite) - samples taken at 3 or 4 depths per profile - determinations made on board by flow injection chemiluminescence, submersible flow injection and adsorptive cathodic stripping voltametry (AdCSV)
Trace metalsQuantity: number of stations = 33
Description: Sediment trace metals from day grab samples for later analysis by ICP/MS
Trace metalsQuantity: number of stations = 33
Description: Particulate trace metals from water filtered for CTD - NISKIN samples - for later analysis by ICP/MS
Petroleum residuesQuantity: number of stations = 15
Description: In-situ pumping system for collection of ultra-trace organic contaminants for later determination by GC/MS
Petroleum residuesQuantity: number of stations = 34
Description: Similar to above but for a wide range of priority pollutants
Chlorinated hydrocarbonsQuantity: number of stations = 34
Description: Similar to above but for a wide range of priority pollutants
Chlorinated hydrocarbonsQuantity: number of stations = 15
Description: In-situ pumping system for collection of ultra-trace organic contaminants for later determination by GC/MS
Other dissolved substancesQuantity: number of stations = 34
Description: Dissolved antifouling booster biocides sampled by hand-held bottle sampler, 10m depth, for determination later by GC/MS
Other dissolved substancesQuantity: number of stations = 2
Description: Sea surface microlayer sampler for ecotoxicological measurements combined with organics and particulate metal determinations
Other dissolved substancesQuantity: number of stations = 34
Description: Similar to above but for a wide range of priority pollutants
Other dissolved substancesQuantity: number of stations = 34
Description: Dissolved and particulate organic contaminants sampled by hand-held bottle sampler and extracted by liquid/liquid extraction for bulk "What's There" determination by GC/MS
Other dissolved substancesQuantity: number of stations = 15
Description: In-situ pumping system for collection of ultra-trace organic contaminants for later determination by GC/MS
Bottom depositsQuantity: number of stations = 34
Description: Day grab for surface sediments to be analysed later for organic contaminants by GC/MS
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 34
Description: As for lugols - chlorophyll filters taken for later determination by fluorescence
PhytoplanktonQuantity: number of stations = 34
Description: As for nutrients above - lugols iodine samples taken for later determination of phytoplankton; samples taken at 10m
Other biological/fisheries measurementQuantity: number of stations = 2
Description: Sea surface microlayer sampler for ecotoxicological measurements combined with organics and particulate metal determinations
Other biological/fisheries measurementQuantity: number of stations = 34
Description: Ecotoxicological measurements of toxicity of water and sediment using early life stages, cellular and physiological assays on invertebrates
Other biological/fisheries measurementQuantity: number of stations = 34
Description: Sediment samples taken by day grab for determination of toxicity using cellular biomarker techniques