Cruise inventory

RRS James Clark Ross JR20141115 (JR304)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20141115 (JR304)
Cruise period2014-11-15 — 2014-12-17
StatusCompleted
Port of departurePunta Arenas, Chile
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesJR304 was a 19 day science cruise to the South Georgia region nested inside a combined logistic and science leg during voyage 24 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. BAS scientists were joined by collaborators from Sir Hardy Foundation for Ocean Science (SAHFOS), National Oceanography Centre (NOC) in addition to PhD students from the DTP's EnvEast, Spitfire and GW4+.

Since 1981 BAS have undertaken cruises to determine krill biomass as part of the ongoing assessment of the status of the marine ecosystem in the region of South Georgia. This unique time series, known as the Western Core Box, is part of the Ecosystem Programme contribution to BAS national capability. It comprises an acoustic grid survey of 8 transects each of 80 km in length, together with associated net and oceanographic sampling and the calibration of the acoustic instrumentation. Net sampling to catch live krill for experiments and observations was also undertaken at night.

In addition to the acoustic survey, which covered a wide area but had limited temporal coverage, there were three moorings (one in the Western Core Box, one southwest and one northwest of South Georgia) to provide a temporal context. These moorings were recovered during the cruise, refurbished and data downloaded, then redeployed later in the cruise.

NB The Cruise Report linked to below is an updated version from May 2016
Chief scientistJonathan L Watkins (British Antarctic Survey)
Coordinating bodyNatural Environment Research Council (NERC)
Cruise reportRRS James Clark Ross JR20141115 (JR304) cruise report jr304.pdf — access key 'C' (10.74 MB) 
Ocean/sea areas 
GeneralSouthern Ocean
SpecificScotia Sea
Track chartsRRS James Clark Ross JR20141115 (JR304) cruise track — jr304trk.pdf (00 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of deployments = 18
Description: ADCP at 200 sampling for 1 yr
Surface measurements underway (T,S)Quantity: number of deployments = 18
Description: ADCP
BathythermographQuantity: number of deployments = 26
Description: XBT
CTD stationsQuantity: number of profiles = 19
Description: CTD at 200 m sampling for 1 yr
CTD stationsQuantity: number of profiles = 19
Description: CTD
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 88
Description: Underway sampling for chlorophyll
Particulate organic matter (inc POC, PON)Quantity: number of profiles = 13
Description: Marine snow camera - vertical profiles
Particulate organic matter (inc POC, PON)Quantity: number of samples = 18
Description: POC from vertical water bottle samples
Particulate organic matter (inc POC, PON)Quantity: number of samples = 30
Description: Marine snow catcher samples - filtered and preserved
Sediment trapsQuantity: number of deployments = 3
Description: Sediment traps. Samples preserved
ZooplanktonQuantity: number of hauls = 9
Description: RMT8 - krill length measurements and photography
ZooplanktonQuantity: number of hauls = 9
Description: RMT8 - krill frozen. Further genetic analysis
ZooplanktonQuantity: number of hauls = 9
Description: RMT8 - macrozooplankton. Frozen samples for stable isotope analysis
ZooplanktonQuantity: number of samples = 4
Description: Bongo nets - mesozooplankton for experiments or preserved
ZooplanktonQuantity: number of samples = 24
Description: Vertical Bongo net samples - preserved for analysis at SAHFOS
ZooplanktonQuantity: number of hauls = 4
Description: LHPR - oblique hauls from 1000 m to surface - gauzes frozen
ZooplanktonQuantity: number of hauls = 9
Description: MOCNESS zooplankton hauls - sampled for experiments or preserved
ZooplanktonQuantity: number of samples = 20
Description: Horizontal CPR samples - preserved for analysis at SAHFOS
ZooplanktonQuantity: number of stations = 17
Description: Bongo nets - Foraminifera
Acoustic reflection on marine organisms.Quantity: activity duration in days = 38
Description: EK60 Multi-frequency scientific echosounder
Meteorology 
Routine standard measurementsQuantity: activity duration in days = 38
Description: Onboard ship meteorological
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 1
Description: Box core - surface sediment samples frozen. Further analysis calcareous plankton
Single-beam echosoundingQuantity: activity duration in days = 35
Description: EA600 Single Beam bathymetry
Moorings, landers, buoys 
Physical oceanography 
CTD stations52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3. Water Depth: 3787m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m). Sediment Traps (x2, ~2000m, ~ 600m). Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Watersampler (~600m)
CTD stations55° 15' 0" S  41° 15' 0" W — Site: Deployed - P2. Water Depth: 3355m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m), Sediment Trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
CTD stations55° 13' 59" S  41° 13' 59" W — Site: Recovered - P2. Water Depth: 3383m. Instrumentation: Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Current meters55° 13' 59" S  41° 13' 59" W — Site: Recovered - P2. Water Depth: 3383m. Instrumentation: Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Current meters52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3. Water Depth: 3787m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m). Sediment Traps (x2, ~2000m, ~ 600m). Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Watersampler (~600m)
Current meters55° 15' 0" S  41° 15' 0" W — Site: Deployed - P2. Water Depth: 3355m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m), Sediment Trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Current profiler (eg ADCP)55° 13' 59" S  41° 13' 59" W — Site: Recovered - P2. Water Depth: 3383m. Instrumentation: Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Current profiler (eg ADCP)52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3. Water Depth: 3787m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m). Sediment Traps (x2, ~2000m, ~ 600m). Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Watersampler (~600m)
Current profiler (eg ADCP)55° 15' 0" S  41° 15' 0" W — Site: Deployed - P2. Water Depth: 3355m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m), Sediment Trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Chemical oceanography 
Oxygen52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3. Water Depth: 3787m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m). Sediment Traps (x2, ~2000m, ~ 600m). Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Watersampler (~600m)
Oxygen55° 15' 0" S  41° 15' 0" W — Site: Deployed - P2. Water Depth: 3355m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m), Sediment Trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Carbon dioxide55° 15' 0" S  41° 15' 0" W — Site: Deployed - P2. Water Depth: 3355m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m), Sediment Trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Carbon dioxide52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3. Water Depth: 3787m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m). Sediment Traps (x2, ~2000m, ~ 600m). Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Watersampler (~600m)
pH55° 15' 0" S  41° 15' 0" W — Site: Deployed - P2. Water Depth: 3355m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m), Sediment Trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
pH52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3. Water Depth: 3787m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m). Sediment Traps (x2, ~2000m, ~ 600m). Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Watersampler (~600m)
Biology and fisheries 
Sediment traps55° 15' 0" S  41° 15' 0" W — Site: Deployed - P2. Water Depth: 3355m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m), Sediment Trap (~2000m), Seaguard current meter & O2 sensor (~550m), Water sampler (~550m)
Sediment traps55° 13' 59" S  41° 13' 59" W — Site: Recovered - P2. Water Depth: 3383m. Instrumentation: Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Sediment traps52° 49' 0" S  40° 7' 0" W — Site: Deployed - P3. Water Depth: 3787m. Instrumentation: Main Buoy (~200 m) - SBE CTD, RDI ADCP, SAMI pH sensor, Oceanus CO2 sensor. Aquadoop current meter (~2000m). Sediment Traps (x2, ~2000m, ~ 600m). Seaguard current meter & O2 sensor (~600m), SBE CTD (~600m), Watersampler (~600m)
Data held at BODC 
Discrete samples 
10  CTD frame plus rosette samplerChlorophyll pigment concentrations in water bodies
111  Sample taken from ship's non-toxic supplyChlorophyll pigment concentrations in water bodies