Planned maintenance — 18th January 2018 12:00 to 22nd January 2018 09:00 [more]

Cruise inventory

RRS James Clark Ross JR19960101 (JR11)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR19960101 (JR11)
Cruise period1996-01-01 — 1996-02-27
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
ObjectivesA two-leg cruise:
Part I was the first in a series of cruises to study interannual variability of the South Georgia marine ecosystem (CP1). This involves an annual study of:
A) The large scale physical and biological systems to the north and west of the Island, across the Polar Front.
B) The operation of the marine ecoysystem in the vicinity of South Georgia.
Objectives:
1. Undertake a standard biological-hydrographic transect across the Polar Front.
2. Undertake a series of hydrographic-hydroacoustic transects in two areas on the north shelf of South Georgia.
3. Station based and targetted biological and hydrographic sampling in two areas on the north shelf of South Georgia.
Part II was a focused study of the biological community of the Polar Frontal Zone to the north of South Georgia, emphasising seabird and squid interactions - a focused study of the biological community of the shelf-offshelf regions on the NW coast of South Georgia.
Chief scientistJulian Priddle (British Antarctic Survey)
ProjectPES Core Programme I and Biological Community Study
Coordinating bodyBAS
Ocean/sea areas 
GeneralSouth Atlantic Ocean
SpecificFalkland Plateau, Maurice Ewing Bank, Polar Frontal Zone, North Scotia Ridge, South Georgia Shelf
Track chartsRRS James Clark Ross JR19960101 (JR11) cruise track — trk4298.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 57
Description: Photosynthetically active radiation sensor; total incident radiation sensor; surface temperature & salinity; surface fluorescence; Acoustic Doppler current profiler
BathythermographQuantity: number of profiles = 228
Description: Expendable bathymetric thermographs of type T7.
Water bottle stationsQuantity: number of stations = 65
Description: Mk IIIb Neil Brown CTD unit for collection of water samples at depth
CTD stationsQuantity: number of stations = 103
Description: Mk IIIb Neil Brown CTD unit
Subsurface temperature and salinity measurementsQuantity: track kilometres = 348.176
Description: Physical oceanographic measurements taken at varying depth with an undulating towed sensor including temperature, salinity, depth, fluorescence and plankton counts
Current profiler (eg ADCP)Quantity: activity duration in days = 57
Description: Photosynthetically active radiation sensor; total incident radiation sensor; surface temperature & salinity; surface fluorescence; Acoustic Doppler current profiler
Chemical oceanography 
PhosphateQuantity: number of stations = 60
Description: CTD water bottle analysis
NitrateQuantity: number of stations = 60
Description: CTD water bottle analysis
NitriteQuantity: number of stations = 60
Description: CTD water bottle analysis
AmmoniaQuantity: number of stations = 60
Description: CTD water bottle analysis
SilicateQuantity: number of stations = 60
Description: CTD water bottle analysis
Biology and fisheries 
Primary productivityQuantity: number of stations = 6
Description: Primary production experiments
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 36
Description: CTD water bottle analysis
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: activity duration in days = 57
Description: Photosynthetically active radiation sensor; total incident radiation sensor; surface temperature & salinity; surface fluorescence; Acoustic Doppler current profiler
ZooplanktonQuantity: number of deployments = 32
Description: Towed Longhurst-Hardy plankton recorder
ZooplanktonQuantity: number of deployments = 136
Description: Vertical Bongo net for collection of zooplankton samples
ZooplanktonQuantity: number of hauls = 8
Description: Vertically hauled Zooplankton net
ZooplanktonQuantity: number of hauls = 71
Description: Vertically hauled Foredeck net for collection of zooplankton samples
ZoobenthosQuantity: number of hauls = 4
Description: Towed Agassiz trawl net for collection of zoobenthos samples
CrustaceansQuantity: number of hauls = 2
Description: Towed Multinet for collection of krill samples
CrustaceansQuantity: number of hauls = 33
Description: Towed Rectangular midwater trawl net for collection of krill samples
Acoustic reflection on marine organisms.Quantity: track kilometres = 5505.996
Description: EK500 acoustic echosounder for target identification
Meteorology 
Incident radiationQuantity: activity duration in days = 57
Description: Photosynthetically active radiation sensor; total incident radiation sensor; surface temperature & salinity; surface fluorescence; Acoustic Doppler current profiler
Data held at BODC 
Discrete samples 
44  CTD frame plus rosette samplerAmmonium and ammonia concentration parameters in water bodies
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
6  Unknown water sampling deviceAmmonium and ammonia concentration parameters in water bodies
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column