Search the data

BODC Cruise Metadata Report for RRS James Clark Ross (74JC) cruise JR20131112 (JR291)

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information

Long name RRS James Clark Ross (74JC) cruise JR20131112 (JR291)
Short name JR20131112 (JR291)
Objectives and Narrative Cruise to the South Georgia region nested inside a combined logistic and science leg during voyage 23 of the RRS James Clark Ross. As part of the logistics element the ship undertook base reliefs at Bird Island and King Edward Point (South Georgia), and Signy (South Orkney Islands). 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.

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) Targetted RMT8 hauls macrozooplankton/micronekton hauls

Four moorings are recovered and redeployed for sustained observations of zooplankton density and carbon export. Two shallow moorings, one near Signy and one on the South Georgia shelf, and two deep moorings located north-west and south-west of South Georgia.
Measurements were made at these moorings sites (as well as two other additional sites) for carbon export (thorium, polonium isotope work and snowcatcher observations with collaborators from NOC, Southampton) and for zooplankton behaviour and effects of ocean acidification.
Ship RRS James Clark Ross
Departure Port Stanley, Falkland Islands (Malvinas)
Departure Date 2013-11-12
Arrival Port Stanley, Falkland Islands (Malvinas)
Arrival Date 2013-12-19
Principal Scientist(s) Sophie Fielding (British Antarctic Survey)
Responsible Organisation British Antarctic Survey
Associated Project(s) BAS Western Core Box and sustained observatories
IHB Sea Areas Visited South West Atlantic Ocean (limit 20W), Southern Ocean
Marsden Squares Visited 483/484/485/520/521
Work Area Description Scotia Sea
Work Area Bounding Polygon 70S,60W; 50S,60W; 50S,30W; 70S,30W; 70S,60W
Southern Limit 70S
Northern Limit 50S
Western Limit 60W
Eastern Limit 30W

Cruise Inventory Datasets

Physical oceanography  
Bathythermograph Quantity: number of profiles = 25
Description: XBTs  
CTD stations Quantity: number of profiles = 23
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 = 19
Description: Acoustic Doppler Current Profiler measurements 75 kHz surveyor  
Chemical oceanography  
Carbon dioxide Quantity: number of profiles = 23
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2  
Isotopes Quantity: number of stations = 5
Description: Stand-alone pump deployments  
Isotopes Quantity: number of stations = 6
Description: Carbon export measurements using thorium and polonium. Made from CTD cast waters  
Isotopes Quantity: activity duration in days = 23
Description: Underway phytoplankton, nutrient and carbon export (thorium and polonium) sampling.  
Isotopes Quantity: number of profiles = 23
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2  
Nitrate Quantity: activity duration in days = 23
Description: Underway phytoplankton, nutrient and carbon export (thorium and polonium) sampling.  
Phosphate Quantity: activity duration in days = 23
Description: Underway phytoplankton, nutrient and carbon export (thorium and polonium) sampling.  
Silicate Quantity: activity duration in days = 23
Description: Underway phytoplankton, nutrient and carbon export (thorium and polonium) sampling.  
pH Description: Pteropod samples from MOCNESS nets  
pH Quantity: number of profiles = 23
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2  
Biology and fisheries  
Acoustic reflection on marine organisms. Quantity: activity duration in days = 19
Description: EK60 multifrequency acoustic backscatter collected at 38, 120 and 200 kHz. Instrument calibrated in Stromness with known reference sphere. Data collected to 1100m  
Biochemical measurements (eg lipids, amino acids) Quantity: number of profiles = 9
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 = 18
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  
Nekton Quantity: number of profiles = 18
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  
Other biological/fisheries measurement Quantity: number of profiles = 18
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  
Particulate organic matter (inc POC, PON) Quantity: number of profiles = 7
Description: Snowcatcher deployments to examine sediment flux  
Phytoplankton Quantity: number of profiles = 23
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: activity duration in days = 23
Description: Underway phytoplankton, nutrient and carbon export (thorium and polonium) sampling.  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of profiles = 7
Description: Snowcatcher deployments to examine sediment flux  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of profiles = 23
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance, Lowered ADCP. Discrete bottle samples pH, fluorescence samples,PCO2  
Zooplankton Quantity: number of profiles = 18
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  
Zooplankton Description: Pteropod samples from MOCNESS nets  
Zooplankton Quantity: number of profiles = 9
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  
Geology and geophysics  
Multi-beam echosounding Quantity: activity duration in days = 6
Description: EM122 swathy bathymetry data  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
55° 15' S 41° 15' W Acoustic reflection on marine organisms. Site is P2. Deployment date 7/12/2013. Water depth is 3200m. Mooring deployed with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
55° 15' S 41° 15' W Acoustic reflection on marine organisms. Site is P2. Recovery date 2/12/2013. Water depth 3200m Mooring recovered with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
52° 46' S 40° 9' W Acoustic reflection on marine organisms. Site is P3. Recovery date 8/12/2013. Water depth is 3700m. Mooring recovered with 1x CTDs (one at ~200m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
53° 48' S 37° 56' W Acoustic reflection on marine organisms. Site is WCB mooring. Deployment date 6/12/2013. Water depth is 320 m. Subsurface buoy at ~220 m water depth. ADCP, WCP and CTD mounted on subsurface buoy.
55° 15' S 41° 15' W Current meters Site is P2. Deployment date 7/12/2013. Water depth is 3200m. Mooring deployed with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
55° 15' S 41° 15' W Current meters Site is P2. Recovery date 2/12/2013. Water depth 3200m Mooring recovered with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
52° 46' S 40° 9' W Current meters Site is P3. Recovery date 8/12/2013. Water depth is 3700m. Mooring recovered with 1x CTDs (one at ~200m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
55° 15' S 41° 15' W Current profiler (eg ADCP) Site is P2. Deployment date 7/12/2013. Water depth is 3200m. Mooring deployed with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
55° 15' S 41° 15' W Current profiler (eg ADCP) Site is P2. Recovery date 2/12/2013. Water depth 3200m Mooring recovered with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
52° 46' S 40° 9' W Current profiler (eg ADCP) Site is P3. Recovery date 8/12/2013. Water depth is 3700m. Mooring recovered with 1x CTDs (one at ~200m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
53° 48' S 37° 56' W Current profiler (eg ADCP) Site is WCB mooring. Deployment date 6/12/2013. Water depth is 320 m. Subsurface buoy at ~220 m water depth. ADCP, WCP and CTD mounted on subsurface buoy.
55° 15' S 41° 15' W Other physical oceanographic measurements Site is P2. Deployment date 7/12/2013. Water depth is 3200m. Mooring deployed with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
55° 15' S 41° 15' W Other physical oceanographic measurements Site is P2. Recovery date 2/12/2013. Water depth 3200m Mooring recovered with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
52° 46' S 40° 9' W Other physical oceanographic measurements Site is P3. Recovery date 8/12/2013. Water depth is 3700m. Mooring recovered with 1x CTDs (one at ~200m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
53° 48' S 37° 56' W Other physical oceanographic measurements Site is WCB mooring. Deployment date 6/12/2013. Water depth is 320 m. Subsurface buoy at ~220 m water depth. ADCP, WCP and CTD mounted on subsurface buoy.
55° 15' S 41° 15' W Sediment traps Site is P2. Deployment date 7/12/2013. Water depth is 3200m. Mooring deployed with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
55° 15' S 41° 15' W Sediment traps Site is P2. Recovery date 2/12/2013. Water depth 3200m Mooring recovered with 2 x CTDs (one at ~200m, one at ~700m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.
52° 46' S 40° 9' W Sediment traps Site is P3. Recovery date 8/12/2013. Water depth is 3700m. Mooring recovered with 1x CTDs (one at ~200m). ADCP at ~200m, sediment trap and current meter is 1700m above the seabed. ~200 m represents the subsurface buoy depth that is variable with current draw down.

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
25 Bathythermograph (MBT/XBT) Reference numbers
Sound velocity and travel time in the water column
Temperature of the water column
Vertical spatial coordinates
14 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Dissolved oxygen parameters in the water column
Electrical conductivity of the water column
Reference numbers
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates
Visible waveband radiance and irradiance measurements in the water column

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

Full List

BODC Reference Instrument Description Date/Time Location  
1809000 CTD/STD cast 2013-11-22 11:39Z 54° 16' S, 36° 26' W Click for more
1809012 CTD/STD cast 2013-11-22 18:57Z 54° 18' S, 36° 26' W Click for more
1809024 CTD/STD cast 2013-11-30 23:05Z 60° 12' S, 46° 20' W Click for more
1809036 CTD/STD cast 2013-12-01 12:34Z 59° 57' S, 46° 9' W Click for more
1809048 CTD/STD cast 2013-12-02 22:28Z 55° 11' S, 41° 20' W Click for more
1809061 CTD/STD cast 2013-12-03 05:59Z 55° 11' S, 41° 20' W Click for more
1809073 CTD/STD cast 2013-12-04 17:07Z 54° 9' S, 36° 41' W Click for more
1809085 CTD/STD cast 2013-12-06 11:53Z 53° 48' S, 37° 56' W Click for more
1809097 CTD/STD cast 2013-12-07 13:41Z 55° 15' S, 41° 17' W Click for more
1809104 CTD/STD cast 2013-12-08 12:13Z 52° 46' S, 40° 9' W Click for more
1809116 CTD/STD cast 2013-12-08 22:44Z 52° 46' S, 40° 9' W Click for more
1809128 CTD/STD cast 2013-12-09 20:12Z 53° 29' S, 39° 15' W Click for more
1809141 CTD/STD cast 2013-12-13 12:15Z 52° 46' S, 40° 9' W Click for more
1809153 CTD/STD cast 2013-12-14 05:01Z 52° 46' S, 40° 9' W Click for more
1811852 Bathythermograph (MBT/XBT) 2013-12-09 08:00Z 53° 20' S, 39° 36' W Click for more
1811864 Bathythermograph (MBT/XBT) 2013-12-09 09:09Z 53° 31' S, 39° 33' W Click for more
1811876 Bathythermograph (MBT/XBT) 2013-12-09 10:17Z 53° 42' S, 39° 30' W Click for more
1811888 Bathythermograph (MBT/XBT) 2013-12-09 11:26Z 53° 52' S, 39° 26' W Click for more
1811907 Bathythermograph (MBT/XBT) 2013-12-09 12:33Z 54° 3' S, 39° 23' W Click for more
1811919 Bathythermograph (MBT/XBT) 2013-12-10 08:00Z 53° 59' S, 38° 49' W Click for more
1811920 Bathythermograph (MBT/XBT) 2013-12-10 09:08Z 53° 49' S, 38° 52' W Click for more
1811932 Bathythermograph (MBT/XBT) 2013-12-10 10:15Z 53° 38' S, 38° 55' W Click for more
1811944 Bathythermograph (MBT/XBT) 2013-12-10 11:23Z 53° 27' S, 38° 58' W Click for more
1811956 Bathythermograph (MBT/XBT) 2013-12-10 12:30Z 53° 17' S, 39° 2' W Click for more
1811968 Bathythermograph (MBT/XBT) 2013-12-11 08:31Z 53° 13' S, 38° 27' W Click for more
1811981 Bathythermograph (MBT/XBT) 2013-12-11 09:40Z 53° 24' S, 38° 23' W Click for more
1811993 Bathythermograph (MBT/XBT) 2013-12-11 10:49Z 53° 34' S, 38° 20' W Click for more
1812007 Bathythermograph (MBT/XBT) 2013-12-11 11:56Z 53° 45' S, 38° 16' W Click for more
1812019 Bathythermograph (MBT/XBT) 2013-12-11 13:02Z 53° 55' S, 38° 13' W Click for more
1812020 Bathythermograph (MBT/XBT) 2013-12-12 08:06Z 53° 52' S, 37° 43' W Click for more
1812032 Bathythermograph (MBT/XBT) 2013-12-12 09:13Z 53° 41' S, 37° 47' W Click for more
1812044 Bathythermograph (MBT/XBT) 2013-12-12 10:20Z 53° 31' S, 37° 51' W Click for more
1812056 Bathythermograph (MBT/XBT) 2013-12-12 11:28Z 53° 20' S, 37° 54' W Click for more
1812068 Bathythermograph (MBT/XBT) 2013-12-12 12:36Z 53° 9' S, 37° 57' W Click for more
1812081 Bathythermograph (MBT/XBT) 2013-12-12 13:13Z 53° 9' S, 37° 49' W Click for more
1812093 Bathythermograph (MBT/XBT) 2013-12-12 14:23Z 53° 19' S, 37° 46' W Click for more
1812100 Bathythermograph (MBT/XBT) 2013-12-12 15:30Z 53° 30' S, 37° 42' W Click for more
1812112 Bathythermograph (MBT/XBT) 2013-12-12 16:38Z 53° 40' S, 37° 39' W Click for more
1812124 Bathythermograph (MBT/XBT) 2013-12-12 17:46Z 53° 51' S, 37° 35' W Click for more

Project Database

# Events Gear Type Parameters Held
170 Sample taken from ship's non-toxic supply
Chlorophyll pigment concentrations in water bodies
23 CTD frame plus rosette sampler
Chlorophyll pigment concentrations in water bodies

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

References

Track Charts

Track Chart

Reports

Cruise Report