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BODC Cruise Metadata Report for RRS James Clark Ross (74JC) cruise JR20111228 (JR260B)

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 JR20111228 (JR260B)
Short name JR20111228 (JR260B)
Objectives and Narrative JR260b was a 19 day Western Core Box cruise to determine the distribution and biomass of krill just off South Georgia. In addition there was an AFI-CGS "Unravelling the origin of the isotope anomaly in atmospheric N2O" led by Jan Kaiser (UEA) and a collaborator from the AWI investigating the effects of hypoxia on krill.

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 is comprised of 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. In addition to the acoustic survey, which covers a wide area but has limited temporal coverage, there are three moorings (one in the Western Core Box and one south and one north of South Georgia) to provide a temporal context. These moorings had been recovered during an earlier cruise (JR260a) at the beginning of the season, a key task of this cruise was to re-deploy these mooring. Finally a series of stratified net samples around the WCB mooring was required to validate the acoustic backscatter series collected by the ADCP and WCP on the WCB mooring. These were undertaken over a 24 hour period to provide information on diurnal variation.
Ship RRS James Clark Ross
Departure Port Stanley, Falkland Islands (Malvinas)
Departure Date 2011-12-28
Arrival Port Stanley, Falkland Islands (Malvinas)
Arrival Date 2012-01-16
Principal Scientist(s) Sophie Fielding (British Antarctic Survey)
Responsible Organisation Defence Research Agency Winfrith
Associated Project(s)
IHB Sea Areas Visited South West Atlantic Ocean (limit 20W)
Marsden Squares Visited 483/484/485
Work Area Description Scotia Sea. Atlantic Sector of the Southern Ocean.
Work Area Bounding Polygon 60S,60W; 50S,60W; 50S,30W; 60S,30W; 60S,60W
Southern Limit 60S
Northern Limit 50S
Western Limit 60W
Eastern Limit 30W

Cruise Inventory Datasets

Physical oceanography  
Bathythermograph Description: XBT  
CTD stations Description: CTD  
Surface measurements underway (T,S) Description: ADCP  
Water bottle stations Description: CTD Bottle Samples  
Chemical oceanography  
Other dissolved gases Description: N20 Sampling  
Biology and fisheries  
Crustaceans Description: RMT8 - krill frozen. Further DNA analysis  
Crustaceans Description: RMT8 - Krill catch  
Crustaceans Description: RMT8 - krill length measurements and photography  
Phytoplankton pigs (eg chlorophyll, fluorescence) Description: Underway - ships non toxic pumped sea water supply  
Zooplankton Description: Stable isotope analysis  
Meteorology  
Routine standard measurements Description: Onboard ships meteorological  
Geology and geophysics  
Bottom photography Description: Underwater krill swarm photographs  
Single-beam echosounding Description: EK60 Biological echosounder 38, 120, 200 kHz  
Single-beam echosounding Description: EA600 Single Beam  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
53° 48' S 37° 56' W CTD stations Water depth - 300m. Sonar bell (10m above release), Main buoy - (~240m) - ASL WCP, SBE CTD, RDI ADCP
55° 12' S 41° 6' W CTD stations Water depth - 3200m. Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
52° 48' S 40° 6' W CTD stations Water depth - 3700m. Aquadoop current meter (2000m), Sediment Trap (2000m), Main Buoy - SBE CTD, RDI ADCP (near surface)
55° 12' S 41° 6' W Current meters Water depth - 3200m. Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
52° 48' S 40° 6' W Current meters Water depth - 3700m. Aquadoop current meter (2000m), Sediment Trap (2000m), Main Buoy - SBE CTD, RDI ADCP (near surface)
53° 48' S 37° 56' W Current profiler (eg ADCP) Water depth - 300m. Sonar bell (10m above release), Main buoy - (~240m) - ASL WCP, SBE CTD, RDI ADCP
55° 12' S 41° 6' W Current profiler (eg ADCP) Water depth - 3200m. Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
52° 48' S 40° 6' W Current profiler (eg ADCP) Water depth - 3700m. Aquadoop current meter (2000m), Sediment Trap (2000m), Main Buoy - SBE CTD, RDI ADCP (near surface)
53° 48' S 37° 56' W Long/short range side scan sonar Water depth - 300m. Sonar bell (10m above release), Main buoy - (~240m) - ASL WCP, SBE CTD, RDI ADCP
55° 12' S 41° 6' W Sediment traps Water depth - 3200m. Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
52° 48' S 40° 6' W Sediment traps Water depth - 3700m. Aquadoop current meter (2000m), Sediment Trap (2000m), Main Buoy - SBE CTD, RDI ADCP (near surface)
53° 48' S 37° 56' W Single-beam echosounding Water depth - 300m. Sonar bell (10m above release), Main buoy - (~240m) - ASL WCP, SBE CTD, RDI ADCP

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
36 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  
1172943 Bathythermograph (MBT/XBT) 2011-12-30 19:38Z 52° 39' S, 42° 44' W Click for more
1172955 Bathythermograph (MBT/XBT) 2012-01-02 08:55Z 54° 3' S, 39° 23' W Click for more
1172967 Bathythermograph (MBT/XBT) 2012-01-02 09:01Z 54° 3' S, 39° 23' W Click for more
1172979 Bathythermograph (MBT/XBT) 2012-01-02 10:08Z 53° 52' S, 39° 26' W Click for more
1172980 Bathythermograph (MBT/XBT) 2012-01-02 10:10Z 53° 52' S, 39° 26' W Click for more
1172992 Bathythermograph (MBT/XBT) 2012-01-02 11:19Z 53° 42' S, 39° 30' W Click for more
1173006 Bathythermograph (MBT/XBT) 2012-01-02 11:22Z 53° 42' S, 39° 30' W Click for more
1173018 Bathythermograph (MBT/XBT) 2012-01-02 12:31Z 53° 31' S, 39° 33' W Click for more
1173031 Bathythermograph (MBT/XBT) 2012-01-02 13:41Z 53° 21' S, 39° 36' W Click for more
1173043 Bathythermograph (MBT/XBT) 2012-01-03 09:01Z 53° 17' S, 39° 2' W Click for more
1173055 Bathythermograph (MBT/XBT) 2012-01-03 09:02Z 53° 17' S, 39° 2' W Click for more
1173067 Bathythermograph (MBT/XBT) 2012-01-03 09:03Z 53° 17' S, 39° 2' W Click for more
1173079 Bathythermograph (MBT/XBT) 2012-01-03 10:10Z 53° 27' S, 38° 58' W Click for more
1173080 Bathythermograph (MBT/XBT) 2012-01-03 10:11Z 53° 27' S, 38° 58' W Click for more
1173092 Bathythermograph (MBT/XBT) 2012-01-03 10:12Z 53° 27' S, 38° 58' W Click for more
1173111 Bathythermograph (MBT/XBT) 2012-01-03 10:12Z 53° 28' S, 38° 58' W Click for more
1173123 Bathythermograph (MBT/XBT) 2012-01-03 11:20Z 53° 38' S, 38° 55' W Click for more
1173135 Bathythermograph (MBT/XBT) 2012-01-03 11:21Z 53° 38' S, 38° 55' W Click for more
1173147 Bathythermograph (MBT/XBT) 2012-01-03 12:32Z 53° 49' S, 38° 52' W Click for more
1173159 Bathythermograph (MBT/XBT) 2012-01-03 13:41Z 53° 59' S, 38° 49' W Click for more
1173160 Bathythermograph (MBT/XBT) 2012-01-04 09:01Z 53° 55' S, 38° 13' W Click for more
1173172 Bathythermograph (MBT/XBT) 2012-01-04 10:07Z 53° 45' S, 38° 16' W Click for more
1173184 Bathythermograph (MBT/XBT) 2012-01-04 11:16Z 53° 34' S, 38° 19' W Click for more
1173196 Bathythermograph (MBT/XBT) 2012-01-04 12:27Z 53° 24' S, 38° 23' W Click for more
1173203 Bathythermograph (MBT/XBT) 2012-01-04 13:37Z 53° 13' S, 38° 27' W Click for more
1173215 Bathythermograph (MBT/XBT) 2012-01-05 09:01Z 53° 9' S, 37° 57' W Click for more
1173227 Bathythermograph (MBT/XBT) 2012-01-05 10:08Z 53° 20' S, 37° 54' W Click for more
1173239 Bathythermograph (MBT/XBT) 2012-01-05 11:20Z 53° 31' S, 37° 51' W Click for more
1173240 Bathythermograph (MBT/XBT) 2012-01-05 12:30Z 53° 41' S, 37° 47' W Click for more
1173252 Bathythermograph (MBT/XBT) 2012-01-05 12:34Z 53° 42' S, 37° 47' W Click for more
1173264 Bathythermograph (MBT/XBT) 2012-01-05 13:41Z 53° 52' S, 37° 43' W Click for more
1173276 Bathythermograph (MBT/XBT) 2012-01-05 14:18Z 53° 51' S, 37° 35' W Click for more
1173288 Bathythermograph (MBT/XBT) 2012-01-05 15:28Z 53° 40' S, 37° 39' W Click for more
1173307 Bathythermograph (MBT/XBT) 2012-01-05 16:37Z 53° 30' S, 37° 42' W Click for more
1173319 Bathythermograph (MBT/XBT) 2012-01-05 17:47Z 53° 19' S, 37° 46' W Click for more
1173320 Bathythermograph (MBT/XBT) 2012-01-05 18:57Z 53° 9' S, 37° 49' W Click for more
1745847 CTD/STD cast 2011-12-30 13:50Z 52° 37' S, 42° 49' W Click for more
1745859 CTD/STD cast 2011-12-31 08:28Z 52° 48' S, 40° 6' W Click for more
1745860 CTD/STD cast 2012-01-01 12:25Z 53° 48' S, 37° 55' W Click for more
1745872 CTD/STD cast 2012-01-02 20:32Z 53° 51' S, 39° 8' W Click for more
1745884 CTD/STD cast 2012-01-03 05:33Z 53° 29' S, 39° 15' W Click for more
1745896 CTD/STD cast 2012-01-03 20:21Z 53° 25' S, 38° 41' W Click for more
1745903 CTD/STD cast 2012-01-04 06:02Z 53° 47' S, 38° 34' W Click for more
1745915 CTD/STD cast 2012-01-04 20:20Z 53° 42' S, 37° 58' W Click for more
1745927 CTD/STD cast 2012-01-05 05:38Z 53° 21' S, 38° 4' W Click for more
1745939 CTD/STD cast 2012-01-07 12:34Z 54° 9' S, 36° 41' W Click for more
1745940 CTD/STD cast 2012-01-09 19:39Z 53° 48' S, 37° 56' W Click for more
1745952 CTD/STD cast 2012-01-10 14:32Z 55° 12' S, 41° 7' W Click for more
1745964 CTD/STD cast 2012-01-12 02:19Z 53° 52' S, 37° 13' W Click for more
1745976 CTD/STD cast 2012-01-12 02:48Z 53° 52' S, 37° 13' W Click for more

Project Database

No data currently held for this cruise in the BODC Project Database

References

Track Charts

Track Chart

Reports

Cruise Report