Cruise inventory

RRS James Clark Ross JR15002

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR15002
Cruise period2015-11-12 — 2015-12-14
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesJR15002 was a science cruise to the South Georgia region nested inside a combined logistic and science leg during voyage 25 of the RRS James Clark Ross. As part of the logistics element the ship undertook base reliefs at Signy (South Orkney Islands), and Bird Island and King Edward Point (South Georgia). During the science part of the cruise we undertook the Western Core Box survey to determine the distribution and biomass of krill northwest of South Georgia, refurbished the biological moorings in the South Georgia region and carried out a series of time stations across the Scotia Sea.
The main deliverable of the WCB is a consistent unique time series of mesoscale distribution and abundance of Antarctic krill and an understanding of the physical environment they are within at South Georgia, South Atlantic (1996 - current). These data are required to understand the long term variability in krill biomass at South Georgia and the influences from climate variability, fishing pressure and predation. Standard data sets include
1. Underway calibrated scientific biological echosounder acoustic transects
2. Vertical CTD profiles and continuous underway data
3. Stratified RMT8 hauls macrozooplankton/micronekton hauls
4. Targeted RMT8 hauls macrozooplankton/micronekton hauls

Two deep moorings located north-west and south-west of South Georgia are recovered and redeployed for sustained observations of zooplankton density and carbon export. Measurements were made at these moorings sites (as well as one other additional site) for carbon export and for zooplankton behaviour and effects of ocean acidification. BAS scientists were joined by PhD students from the DTP's EnvEast programme, from Bristol and Nottingham Universities in the UK and from Penn State University in the US.
Chief scientistGabrielle Stowasser (British Antarctic Survey)
ProjectWestern Core Box
Coordinating bodyBritish Antarctic Survey (BAS)
Cruise reportRRS James Clark Ross JR15002 cruise report jr15002.pdf — access key 'C' (2.90 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
Southern Ocean
SpecificSouth Georgia
Track chartsRRS James Clark Ross JR15002 cruise track — jr15002trk.pdf (00 MB) 
Measurements 
Physical oceanography 
BathythermographQuantity: number of profiles = 25
Description: XBTs
CTD stationsQuantity: number of profiles = 17
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2
Current profiler (eg ADCP)Quantity: activity duration in days = 35
Description: Acoustic Doppler Current Profiler measurements 75 kHz surveyor
Chemical oceanography 
Carbon dioxideQuantity: number of profiles = 17
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2
pHQuantity: number of samples = 13
Description: Pteropod samples from MOCNESS and Bongo nets.
pHQuantity: number of profiles = 17
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2
IsotopesQuantity: number of profiles = 17
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2
IsotopesQuantity: number of cores = 2
Description: Sediment cores for the collection of foraminifera
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 17
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2
Particulate organic matter (inc POC, PON)Quantity: number of samples = 8
Description: Underway POM sampling for e-DNA analysis
Biochemical measurements (eg lipids, amino acids)Quantity: number of profiles = 2
Description: Multiple Opening and Closing Net and Environmental Sampling System (MOCNESS) 9 opening and closing nets in vertical profiles to a depth of 1000m. Samples to be analysed for genetics, lipids and effects of ocean acidification
Biochemical measurements (eg lipids, amino acids)Quantity: number of profiles = 11
Description: Rectangular Midwater Trawl 8 (RMT8) opening and closing nets. Two nets at each event. Targetted hauls and oblique trawls for krill samples (length frequency) and macrozooplankton sampling
Biochemical measurements (eg lipids, amino acids)Quantity: number of profiles = 7
Description: Underway phytoplankton
PhytoplanktonQuantity: number of profiles = 7
Description: Underway phytoplankton
PhytoplanktonQuantity: number of profiles = 17
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2
ZooplanktonQuantity: number of profiles = 11
Description: Rectangular Midwater Trawl 8 (RMT8) opening and closing nets. Two nets at each event. Targetted hauls and oblique trawls for krill samples (length frequency) and macrozooplankton sampling
ZooplanktonQuantity: number of profiles = 2
Description: Multiple Opening and Closing Net and Environmental Sampling System (MOCNESS) 9 opening and closing nets in vertical profiles to a depth of 1000m. Samples to be analysed for genetics, lipids and effects of ocean acidification
ZooplanktonQuantity: number of profiles = 7
Description: Zooplankton samples for microplastics from RMT8 nets
ZooplanktonQuantity: number of hauls = 5
Description: Foraminifera samples from Bongo nets
ZooplanktonQuantity: number of samples = 13
Description: Pteropod samples from MOCNESS and Bongo nets.
NektonQuantity: number of profiles = 11
Description: Rectangular Midwater Trawl 8 (RMT8) opening and closing nets. Two nets at each event. Targetted hauls and oblique trawls for krill samples (length frequency) and macrozooplankton sampling
Acoustic reflection on marine organisms.Quantity: activity duration in days = 35
Description: EK60 multifrequency acoustic backscatter collected at 38, 120 and 200 kHz. Instrument calibrated in Stromness with known reference sphere. Data collected to 1100m
Other biological/fisheries measurementQuantity: number of profiles = 11
Description: Rectangular Midwater Trawl 8 (RMT8) opening and closing nets. Two nets at each event. Targetted hauls and oblique trawls for krill samples (length frequency) and macrozooplankton sampling
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 2
Description: Sediment cores for the collection of foraminifera
Multi-beam echosoundingQuantity: activity duration in days = 6
Description: EM122 swath bathymetry data
Moorings, landers, buoys 
Physical oceanography 
CTD stations52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~200m and ~600m), SBE CTD (~600m)
CTD stations55° 15' 0" S  41° 16' 0" W — Site: Deployed - P2 Water depth: 3418 m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, Aquadop current meter (~600m), Sediment traps (~600m and ~2000m)
CTD stations52° 49' 0" S  40° 7' 0" W — Site: Recovered - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Water sampler (~600m)
CTD stations55° 15' 0" S  41° 15' 0" W — Site: Recovered - P2 Water depth: 3355m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Current meters55° 15' 0" S  41° 15' 0" W — Site: Recovered - P2 Water depth: 3355m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Current meters52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~200m and ~600m), SBE CTD (~600m)
Current meters55° 15' 0" S  41° 16' 0" W — Site: Deployed - P2 Water depth: 3418 m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, Aquadop current meter (~600m), Sediment traps (~600m and ~2000m)
Current meters52° 49' 0" S  40° 7' 0" W — Site: Recovered - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Water sampler (~600m)
Current profiler (eg ADCP)52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~200m and ~600m), SBE CTD (~600m)
Current profiler (eg ADCP)55° 15' 0" S  41° 15' 0" W — Site: Recovered - P2 Water depth: 3355m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Current profiler (eg ADCP)52° 49' 0" S  40° 7' 0" W — Site: Recovered - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Water sampler (~600m)
Current profiler (eg ADCP)55° 15' 0" S  41° 16' 0" W — Site: Deployed - P2 Water depth: 3418 m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, Aquadop current meter (~600m), Sediment traps (~600m and ~2000m)
Chemical oceanography 
Oxygen55° 15' 0" S  41° 15' 0" W — Site: Recovered - P2 Water depth: 3355m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Oxygen52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~200m and ~600m), SBE CTD (~600m)
Oxygen52° 49' 0" S  40° 7' 0" W — Site: Recovered - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Water sampler (~600m)
Carbon dioxide52° 49' 0" S  40° 7' 0" W — Site: Recovered - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Water sampler (~600m)
Carbon dioxide55° 15' 0" S  41° 15' 0" W — Site: Recovered - P2 Water depth: 3355m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
pH55° 15' 0" S  41° 15' 0" W — Site: Recovered - P2 Water depth: 3355m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
pH52° 49' 0" S  40° 7' 0" W — Site: Recovered - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Water sampler (~600m)
Biology and fisheries 
Sediment traps52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~200m and ~600m), SBE CTD (~600m)
Sediment traps52° 49' 0" S  40° 7' 0" W — Site: Recovered - P3 Water depth: 3787m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment traps (~600m and ~2000m), Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Water sampler (~600m)
Sediment traps55° 15' 0" S  41° 15' 0" W — Site: Recovered - P2 Water depth: 3355m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadop current meter (~2000m), Sediment trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Sediment traps55° 15' 0" S  41° 16' 0" W — Site: Deployed - P2 Water depth: 3418 m Instrumentation: Main Buoy (~200m) - SBE CTD, RDI ADCP, Aquadop current meter (~600m), Sediment traps (~600m and ~2000m)