Cruise inventory

RRS James Clark Ross JR20111228 (JR260B)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20111228 (JR260B)
Cruise period2011-12-28 — 2012-01-16
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesJR260b 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.
Chief scientistSophie Fielding (British Antarctic Survey)
Coordinating bodyBritish Antarctic Survey (BAS)
Cruise reportRRS James Clark Ross JR20111228 (JR260B) cruise report jr260b.pdf — access key 'C' (3.14 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
SpecificScotia Sea. Atlantic Sector of the Southern Ocean.
Track chartsRRS James Clark Ross JR20111228 (JR260B) cruise track — jr260btrk.pdf (00 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Description: ADCP
BathythermographDescription: XBT
Water bottle stationsDescription: CTD Bottle Samples
CTD stationsDescription: CTD
Chemical oceanography 
Other dissolved gasesDescription: N20 Sampling
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: Underway - ships non toxic pumped sea water supply
ZooplanktonDescription: Stable isotope analysis
CrustaceansDescription: RMT8 - Krill catch
CrustaceansDescription: RMT8 - krill length measurements and photography
CrustaceansDescription: RMT8 - krill frozen. Further DNA analysis
Meteorology 
Routine standard measurementsDescription: Onboard ships meteorological
Geology and geophysics 
Bottom photographyDescription: Underwater krill swarm photographs
Single-beam echosoundingDescription: EK60 Biological echosounder 38, 120, 200 kHz
Single-beam echosoundingDescription: EA600 Single Beam
Moorings, landers, buoys 
Physical oceanography 
CTD stations52° 48' 30" S  40° 6' 39" W — Water depth - 3700m. Aquadoop current meter (2000m), Sediment Trap (2000m), Main Buoy - SBE CTD, RDI ADCP (near surface)
CTD stations55° 12' 31" S  41° 6' 39" W — Water depth - 3200m. Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
CTD stations53° 47' 52" S  37° 56' 10" W — Water depth - 300m. Sonar bell (10m above release), Main buoy - (~240m) - ASL WCP, SBE CTD, RDI ADCP
Current meters52° 48' 30" S  40° 6' 39" W — Water depth - 3700m. Aquadoop current meter (2000m), Sediment Trap (2000m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Current meters55° 12' 31" S  41° 6' 39" W — Water depth - 3200m. Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Current profiler (eg ADCP)52° 48' 30" S  40° 6' 39" W — Water depth - 3700m. Aquadoop current meter (2000m), Sediment Trap (2000m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Current profiler (eg ADCP)55° 12' 31" S  41° 6' 39" W — Water depth - 3200m. Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Current profiler (eg ADCP)53° 47' 52" S  37° 56' 10" W — Water depth - 300m. Sonar bell (10m above release), Main buoy - (~240m) - ASL WCP, SBE CTD, RDI ADCP
Biology and fisheries 
Sediment traps55° 12' 31" S  41° 6' 39" W — Water depth - 3200m. Aquadoop current meter (1500m), Sediment Trap (1500m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Sediment traps52° 48' 30" S  40° 6' 39" W — Water depth - 3700m. Aquadoop current meter (2000m), Sediment Trap (2000m), Main Buoy - SBE CTD, RDI ADCP (near surface)
Geology and geophysics 
Single-beam echosounding53° 47' 52" S  37° 56' 10" W — Water depth - 300m. Sonar bell (10m above release), Main buoy - (~240m) - ASL WCP, SBE CTD, RDI ADCP
Long/short range side scan sonar53° 47' 52" S  37° 56' 10" W — Water depth - 300m. Sonar bell (10m above release), Main buoy - (~240m) - ASL WCP, SBE CTD, RDI ADCP
Data held at BODC 
Series/Profiles 
36  Bathythermograph (MBT/XBT)
Sound velocity and travel time in the water column
Vertical spatial coordinates
Temperature of the water column
Reference numbers
Sound velocity and travel time in the water column
Vertical spatial coordinates
Temperature of the water column
Reference numbers

BODC idDate/TimeLocationDoc.
11729432011-12-30 19:38 52° 39' 24" S  42° 44' 29" W  View metadata report for BODC series reference number 1172943
11729552012-01-02 08:55 54° 3' 48" S  39° 23' 18" W  View metadata report for BODC series reference number 1172955
11729672012-01-02 09:01 54° 3' 16" S  39° 23' 30" W  View metadata report for BODC series reference number 1172967
11729792012-01-02 10:08 53° 52' 48" S  39° 26' 39" W  View metadata report for BODC series reference number 1172979
11729802012-01-02 10:10 53° 52' 39" S  39° 26' 41" W  View metadata report for BODC series reference number 1172980
11729922012-01-02 11:19 53° 42' 4" S  39° 29' 50" W  View metadata report for BODC series reference number 1172992
11730062012-01-02 11:22 53° 41' 42" S  39° 29' 57" W  View metadata report for BODC series reference number 1173006
11730182012-01-02 12:31 53° 31' 23" S  39° 33' 1" W  View metadata report for BODC series reference number 1173018
11730312012-01-02 13:41 53° 20' 49" S  39° 36' 8" W  View metadata report for BODC series reference number 1173031
11730432012-01-03 09:01 53° 17' 12" S  39° 2' 18" W  View metadata report for BODC series reference number 1173043
11730552012-01-03 09:02 53° 17' 17" S  39° 2' 16" W  View metadata report for BODC series reference number 1173055
11730672012-01-03 09:03 53° 17' 27" S  39° 2' 13" W  View metadata report for BODC series reference number 1173067
11730792012-01-03 10:10 53° 27' 39" S  38° 59' 3" W  View metadata report for BODC series reference number 1173079
11730802012-01-03 10:11 53° 27' 46" S  38° 59' 1" W  View metadata report for BODC series reference number 1173080
11730922012-01-03 10:12 53° 27' 51" S  38° 58' 59" W  View metadata report for BODC series reference number 1173092
11731112012-01-03 10:12 53° 27' 55" S  38° 58' 57" W  View metadata report for BODC series reference number 1173111
11731232012-01-03 11:20 53° 38' 24" S  38° 55' 44" W  View metadata report for BODC series reference number 1173123
11731352012-01-03 11:21 53° 38' 28" S  38° 55' 42" W  View metadata report for BODC series reference number 1173135
11731472012-01-03 12:32 53° 49' 2" S  38° 52' 26" W  View metadata report for BODC series reference number 1173147
11731592012-01-03 13:41 53° 59' 38" S  38° 49' 7" W  View metadata report for BODC series reference number 1173159
11731602012-01-04 09:01 53° 55' 33" S  38° 13' 14" W  View metadata report for BODC series reference number 1173160
11731722012-01-04 10:07 53° 45' 2" S  38° 16' 40" W  View metadata report for BODC series reference number 1173172
11731842012-01-04 11:16 53° 34' 27" S  38° 20' 5" W  View metadata report for BODC series reference number 1173184
11731962012-01-04 12:27 53° 23' 52" S  38° 23' 30" W  View metadata report for BODC series reference number 1173196
11732032012-01-04 13:37 53° 13' 15" S  38° 26' 55" W  View metadata report for BODC series reference number 1173203
11732152012-01-05 09:01 53° 9' 53" S  37° 57' 50" W  View metadata report for BODC series reference number 1173215
11732272012-01-05 10:08 53° 20' 11" S  37° 54' 13" W  View metadata report for BODC series reference number 1173227
11732392012-01-05 11:20 53° 31' 1" S  37° 50' 48" W  View metadata report for BODC series reference number 1173239
11732402012-01-05 12:30 53° 41' 34" S  37° 47' 15" W  View metadata report for BODC series reference number 1173240
11732522012-01-05 12:34 53° 41' 59" S  37° 47' 6" W  View metadata report for BODC series reference number 1173252
11732642012-01-05 13:41 53° 52' 9" S  37° 43' 41" W  View metadata report for BODC series reference number 1173264
11732762012-01-05 14:18 53° 51' 11" S  37° 35' 39" W  View metadata report for BODC series reference number 1173276
11732882012-01-05 15:28 53° 40' 35" S  37° 39' 16" W  View metadata report for BODC series reference number 1173288
11733072012-01-05 16:37 53° 30' 2" S  37° 42' 42" W  View metadata report for BODC series reference number 1173307
11733192012-01-05 17:47 53° 19' 27" S  37° 46' 19" W  View metadata report for BODC series reference number 1173319
11733202012-01-05 18:57 53° 8' 53" S  37° 49' 56" W  View metadata report for BODC series reference number 1173320
14  CTD/STD cast

BODC idDate/TimeLocationDoc.
17458962012-01-03 20:21 53° 25' 54" S  38° 41' 41" W  View metadata report for BODC series reference number 1745896
17459032012-01-04 06:02 53° 47' 6" S  38° 34' 59" W  View metadata report for BODC series reference number 1745903
17459152012-01-04 20:20 53° 42' 50" S  37° 57' 56" W  View metadata report for BODC series reference number 1745915
17459272012-01-05 05:38 53° 21' 41" S  38° 4' 56" W  View metadata report for BODC series reference number 1745927
17459392012-01-07 12:34 54° 9' 31" S  36° 41' 39" W  View metadata report for BODC series reference number 1745939
17459402012-01-09 19:39 53° 47' 52" S  37° 56' 8" W  View metadata report for BODC series reference number 1745940
17459522012-01-10 14:32 55° 12' 37" S  41° 6' 58" W  View metadata report for BODC series reference number 1745952
17459642012-01-12 02:19 53° 52' 25" S  37° 13' 13" W  View metadata report for BODC series reference number 1745964
17459762012-01-12 02:48 53° 52' 23" S  37° 13' 23" W  View metadata report for BODC series reference number 1745976
17458472011-12-30 13:50 52° 38' 4" S  42° 49' 13" W  View metadata report for BODC series reference number 1745847
17458592011-12-31 08:28 52° 48' 31" S  40° 6' 49" W  View metadata report for BODC series reference number 1745859
17458602012-01-01 12:25 53° 47' 51" S  37° 56' 4" W  View metadata report for BODC series reference number 1745860
17458722012-01-02 20:32 53° 50' 47" S  39° 8' 33" W  View metadata report for BODC series reference number 1745872
17458842012-01-03 05:33 53° 29' 33" S  39° 15' 4" W  View metadata report for BODC series reference number 1745884