Cruise inventory

RRS Challenger CH6/83

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH6/83
Cruise period1983-04-07 — 1983-05-08
StatusCompleted
Port of departureFalmouth, United Kingdom
Port of returnFalmouth, United Kingdom
PurposeResearch
Objectives1. To investigate the development of the spring phytoplankton bloom and its ultimate collapse, resulting in a rapid sinking of phytodetritus to the benthos.
2. To attempt to detect and sample the sinking material.
3. To deploy two bathysnaps to record the arrival of the phytodetritus on the sea floor.
4. To obtain a time series of SMBA multiple corer samples at a number of stations before and after the arrival of the phytodetritus.
5. To obtain epibenthic sledge samples of a hexactinellid sponge community at around 1250m depth, and miscellaneous invertebrates at 1500m.
6. To obtain long photographic transects using the epibenthic sledge as a photosled, without nets.
Chief scientistAnthony L Rice (Institute of Oceanographic Sciences Wormley Laboratory)
Cruise reportRRS Challenger CH6/83 cruise report ch6_83.pdf — access key 'C' (0.59 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
North East Atlantic Ocean (limit 40W)
SpecificPorcupine Bight
Track chartsRRS Challenger CH6/83 cruise track — trk3170.html
Measurements 
Physical oceanography 
CTD stationsQuantity: number of stations = 62
Description: CTD
Subsurface temperature and salinity measurementsQuantity: number of deployments = 7
Description: SeaSoar undulating towed CTD
Chemical oceanography 
PhosphateQuantity: number of stations = 10
Description: Profile
NitrateQuantity: number of stations = 10
Description: Profile
SilicateQuantity: number of stations = 10
Description: Profile
Biology and fisheries 
Primary productivityQuantity: number of experiments = 6
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 40
Particulate organic matter (inc POC, PON)Quantity: number of samples = 80
ZoobenthosQuantity: number of samples = 4
Geology and geophysics 
Core - soft bottomQuantity: number of stations = 16
Bottom photographyQuantity: number of images = 2000
Description: More than 2000
Data held at BODC 
Series/Profiles 
56  CTD/STD cast
Visible waveband radiance and irradiance measurements in the water column
Transmittance and attenuance of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Dissolved oxygen parameters in the water column
Visible waveband radiance and irradiance measurements in the water column
Transmittance and attenuance of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Dissolved oxygen parameters in the water column

BODC idDate/TimeLocationDoc.