Cruise inventory

RRS James Clark Ross JR15006

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR15006
Cruise period2016-03-31 — 2016-04-26
StatusCompleted
Port of departureMare Harbour, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesThe voyage of the RRS James Clark Ross JR15006 consisted of the semi-annually repeated A23 hydrographic CTD section between the Weddell Sea and South Georgia, combined with the opportunistic request for 6 extra science days to take advantage of the newly installed oxygen isotope auto-analyser connected to the ship underway system. The goal of this extension was to collect 'end member' samples of oxygen isotopes from freshwater input to the region in order to attribute the freshwater component of underway observations to various percentage contributions from (for e.g.) sea ice melt, precipitation, glacial outflow etc. In addition oxygen isotopes were collected from CTDs on both A23 and in the vicinity of strong freshwater input, to establish the mixing between deep ocean interior values and local surface sources.

The voyage proceeded from Mare Harbour, Falkland Islands, immediately to Signy Island in the South Orkneys group. A day of ice/meltwater/shore water sample collection from and around MacLeod Glacier was undertaken, both by shore parties and small boats in front of the glacial terminus, before three CTDs were conducted away from the island. We then headed to the southern end of the A23 section and entered the advancing pack ice edge. Here we found a good example of multi-year sea ice and took ice core sections from it, as well as adjacent new ice and surface water samples, along with two CTDs, both within the pack and on its margins. From here we conducted six days of 24 hour CTD operations north along A23, occupying almost 30 full depth stations, with d18O sampled on all stations.

At the northern end of A23 we steamed to Cumberland Bay, South Georgia and repeated shore sampling, small boat surface sampling and CTDs along and across Cumberland Bay East and the entrance to Cumberland Bay West. This included shore parties taking glacial cores and water samples from Glacier Col and Gul Lake.

Following this work we proceeded back to Stanley, the Falkland Islands. During all ship operations underway instruments were left on. These included underway water samples taking pCO2, temperature, salinity and d18O, VMADCP velocity measurement, EM122 swath and EA600 acoustics and a full suite of meteorological readings. The only exception to this was within dense pack ice where underway water supplied had to be turned off to avoid ice damage to the intake/pumps.
Chief scientistAndrew J S Meijers (British Antarctic Survey)
ProjectORCHESTRA
Coordinating bodyNatural Environment Research Council (NERC)
Cruise reportRRS James Clark Ross JR15006 cruise report jr15006.pdf — access key 'C' (6.83 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
Southern Ocean
SpecificSigny Island, Cumberland Bay (South Georgia).
Track chartsRRS James Clark Ross JR15006 cruise track — jr15006trk.pdf (0.08 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 6776
Description: Underway water sampling surface d18O auto-analyser
Surface measurements underway (T,S)Quantity: track kilometres = 6776
Description: Underway water sampling (surface salinity + d18O bottle samples, every ~4 hours when underway)
Surface measurements underway (T,S)Quantity: track kilometres = 6776
Description: Underway ocean measurements
Water bottle stationsQuantity: number of stations = 49
Description: CTD casts. Continuous recordings conductivity, temperature, depth, fluorescence, PAR, transmittance.
CTD stationsQuantity: number of stations = 49
Description: CTD casts. Continuous recordings conductivity, temperature, depth, fluorescence, PAR, transmittance.
Current profiler (eg ADCP)Quantity: number of stations = 48
Description: Lowered Acoustic Doppler Current Profiler mounted on CTD frame.
Current profiler (eg ADCP)Quantity: track kilometres = 6776
Description: Ship mounted Acoustic Doppler Current Profiler measurements (75 kHz)
Chemical oceanography 
OxygenQuantity: track kilometres = 6776
Description: Underway water sampling (surface salinity + d18O bottle samples, every ~4 hours when underway)
OxygenQuantity: number of cores = 10
Description: Ice core samples from MacLeod Glacier (Signy), Sea Ice (Weddell Sea) and Glacier Col (South Georgia). For salinity + d18O sampling.
OxygenQuantity: number of stations = 2
Description: Surface water samples (salinity + d18O) from side of ship
OxygenQuantity: number of stations = 3
Description: Surface water samples (salinity + d18O) from small boats
OxygenQuantity: track kilometres = 6776
Description: Underway water sampling surface d18O auto-analyser
OxygenQuantity: number of stations = 48
Description: CTD water analysis - d18O, sampled trhough water column.
IsotopesQuantity: number of stations = 3
Description: Surface water samples (salinity + d18O) from small boats
IsotopesQuantity: number of cores = 10
Description: Ice core samples from MacLeod Glacier (Signy), Sea Ice (Weddell Sea) and Glacier Col (South Georgia). For salinity + d18O sampling.
IsotopesQuantity: track kilometres = 6776
Description: Underway water sampling surface d18O auto-analyser
IsotopesQuantity: number of stations = 2
Description: Surface water samples (salinity + d18O) from side of ship
IsotopesQuantity: track kilometres = 6776
Description: Underway water sampling (surface salinity + d18O bottle samples, every ~4 hours when underway)
IsotopesQuantity: number of stations = 48
Description: CTD water analysis - d18O, sampled trhough water column.
Other chemical oceanographic measurementsQuantity: number of stations = 49
Description: CTD water analysis - Salinity. Sampled through water column.
Meteorology 
Routine standard measurementsQuantity: track kilometres = 6776
Description: Underway meterological measurements
Geology and geophysics 
Multi-beam echosoundingQuantity: track kilometres = 6776
Description: EM122 swath bathymetry data
Data held at BODC 
Series/Profiles 
48  Acoustic doppler current profiler
Metadata parameters
Vertical spatial coordinates
Horizontal velocity of the water column (currents)
Reference numbers
Metadata parameters
Vertical spatial coordinates
Horizontal velocity of the water column (currents)
Reference numbers

BODC idDate/TimeLocationDoc.
17985652016-04-21 16:48:41 54° 7' 42" S  36° 16' 27" W  View metadata report for BODC series reference number 1798565
17985772016-04-21 18:38:31 53° 58' 6" S  35° 55' 44" W  View metadata report for BODC series reference number 1798577
17985892016-04-21 20:32:52 53° 48' 28" S  35° 35' 8" W  View metadata report for BODC series reference number 1798589
17980802016-04-04 21:15:31 60° 45' 11" S  45° 36' 39" W  View metadata report for BODC series reference number 1798080
17980922016-04-04 22:34:19 60° 50' 21" S  45° 32' 49" W  View metadata report for BODC series reference number 1798092
17981112016-04-09 16:10:37 68° 8' 30" S  31° 0' 13" W  View metadata report for BODC series reference number 1798111
17981232016-04-10 11:34:37 66° 42' 18" S  27° 2' 59" W  View metadata report for BODC series reference number 1798123
17981352016-04-11 01:44:40 63° 57' 51" S  28° 52' 38" W  View metadata report for BODC series reference number 1798135
17981472016-04-11 10:14:14 63° 21' 5" S  29° 33' 44" W  View metadata report for BODC series reference number 1798147
17981592016-04-11 16:22:05 63° 4' 20" S  30° 6' 59" W  View metadata report for BODC series reference number 1798159
17981602016-04-12 04:41:09 62° 29' 29" S  31° 15' 35" W  View metadata report for BODC series reference number 1798160
17981722016-04-12 10:47:28 62° 4' 35" S  31° 11' 34" W  View metadata report for BODC series reference number 1798172
17981842016-04-12 16:53:25 61° 39' 39" S  31° 6' 39" W  View metadata report for BODC series reference number 1798184
17981962016-04-12 22:44:26 61° 10' 16" S  31° 3' 5" W  View metadata report for BODC series reference number 1798196
17982032016-04-13 04:34:59 60° 42' 2" S  31° 0' 32" W  View metadata report for BODC series reference number 1798203
17982152016-04-13 08:34:55 60° 18' 52" S  30° 57' 28" W  View metadata report for BODC series reference number 1798215
17982272016-04-13 12:43:11 60° 0' 3" S  30° 56' 16" W  View metadata report for BODC series reference number 1798227
17982392016-04-13 16:24:41 59° 45' 55" S  30° 54' 25" W  View metadata report for BODC series reference number 1798239
17982402016-04-13 21:16:19 59° 26' 15" S  30° 51' 38" W  View metadata report for BODC series reference number 1798240
17982522016-04-14 02:12:57 59° 3' 2" S  30° 49' 58" W  View metadata report for BODC series reference number 1798252
17982642016-04-14 07:11:32 58° 38' 3" S  30° 49' 26" W  View metadata report for BODC series reference number 1798264
17982762016-04-14 12:43:24 58° 12' 40" S  30° 49' 6" W  View metadata report for BODC series reference number 1798276
17982882016-04-14 18:29:44 57° 48' 6" S  30° 49' 54" W  View metadata report for BODC series reference number 1798288
17983072016-04-15 01:09:03 57° 27' 27" S  31° 19' 48" W  View metadata report for BODC series reference number 1798307
17983192016-04-15 06:53:03 57° 7' 10" S  31° 48' 48" W  View metadata report for BODC series reference number 1798319
17983202016-04-15 12:45:36 56° 46' 35" S  32° 18' 12" W  View metadata report for BODC series reference number 1798320
17983322016-04-15 18:14:54 56° 22' 54" S  32° 52' 22" W  View metadata report for BODC series reference number 1798332
17983442016-04-16 00:09:49 55° 59' 28" S  33° 25' 18" W  View metadata report for BODC series reference number 1798344
17983562016-04-16 04:47:56 55° 43' 30" S  33° 47' 3" W  View metadata report for BODC series reference number 1798356
17983682016-04-16 10:05:45 55° 29' 11" S  34° 7' 54" W  View metadata report for BODC series reference number 1798368
17983812016-04-16 14:14:30 55° 17' 19" S  34° 24' 9" W  View metadata report for BODC series reference number 1798381
17983932016-04-16 16:27:21 55° 15' 35" S  34° 26' 35" W  View metadata report for BODC series reference number 1798393
17980672016-04-01 17:24:05 55° 14' 54" S  53° 50' 53" W  View metadata report for BODC series reference number 1798067
17980792016-04-04 20:22:46 60° 44' 44" S  45° 36' 49" W  View metadata report for BODC series reference number 1798079
17984002016-04-16 18:13:37 55° 13' 49" S  34° 29' 22" W  View metadata report for BODC series reference number 1798400
17984122016-04-16 19:29:20 55° 12' 56" S  34° 30' 27" W  View metadata report for BODC series reference number 1798412
17984242016-04-17 12:49:18 54° 21' 55" S  36° 22' 15" W  View metadata report for BODC series reference number 1798424
17984362016-04-17 16:42:44 54° 19' 30" S  36° 23' 2" W  View metadata report for BODC series reference number 1798436
17984482016-04-17 17:45:22 54° 18' 8" S  36° 24' 2" W  View metadata report for BODC series reference number 1798448
17984612016-04-17 18:45:58 54° 16' 41" S  36° 25' 14" W  View metadata report for BODC series reference number 1798461
17984732016-04-17 19:40:11 54° 15' 33" S  36° 26' 5" W  View metadata report for BODC series reference number 1798473
17984852016-04-18 12:51:29 54° 13' 28" S  36° 25' 23" W  View metadata report for BODC series reference number 1798485
17984972016-04-18 13:42:16 54° 13' 31" S  36° 26' 11" W  View metadata report for BODC series reference number 1798497
17985042016-04-18 14:37:49 54° 13' 29" S  36° 27' 2" W  View metadata report for BODC series reference number 1798504
17985162016-04-18 15:30:32 54° 13' 29" S  36° 27' 46" W  View metadata report for BODC series reference number 1798516
17985282016-04-18 16:14:22 54° 13' 6" S  36° 27' 58" W  View metadata report for BODC series reference number 1798528
17985412016-04-18 17:04:07 54° 12' 34" S  36° 27' 57" W  View metadata report for BODC series reference number 1798541
17985532016-04-18 17:57:23 54° 11' 58" S  36° 27' 58" W  View metadata report for BODC series reference number 1798553
49  CTD/STD cast
Density of the water column
Visible waveband radiance and irradiance measurements in the water column
Transmittance and attenuance of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Reference numbers
Dissolved oxygen parameters in the water column
Density of the water column
Visible waveband radiance and irradiance measurements in the water column
Transmittance and attenuance of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Reference numbers
Dissolved oxygen parameters in the water column

BODC idDate/TimeLocationDoc.
17955672016-04-01 05:20 55° 14' 53" S  53° 50' 53" W  View metadata report for BODC series reference number 1795567
17955792016-04-04 08:18 60° 44' 44" S  45° 36' 49" W  View metadata report for BODC series reference number 1795579
17955802016-04-04 09:10 60° 45' 11" S  45° 36' 38" W  View metadata report for BODC series reference number 1795580
17955922016-04-04 10:27 60° 50' 21" S  45° 32' 49" W  View metadata report for BODC series reference number 1795592
17956112016-04-09 04:06 68° 8' 30" S  31° 0' 11" W  View metadata report for BODC series reference number 1795611
17956232016-04-10 11:30 66° 42' 18" S  27° 3' 0" W  View metadata report for BODC series reference number 1795623
17956352016-04-11 01:40 63° 57' 51" S  28° 52' 38" W  View metadata report for BODC series reference number 1795635
17956472016-04-11 10:10 63° 21' 4" S  29° 33' 44" W  View metadata report for BODC series reference number 1795647
17956592016-04-11 04:26 63° 4' 20" S  30° 6' 59" W  View metadata report for BODC series reference number 1795659
17956602016-04-11 10:41 62° 47' 25" S  30° 41' 42" W  View metadata report for BODC series reference number 1795660
17956722016-04-12 04:36 62° 29' 29" S  31° 15' 35" W  View metadata report for BODC series reference number 1795672
17956842016-04-12 10:42 62° 4' 35" S  31° 11' 34" W  View metadata report for BODC series reference number 1795684
17956962016-04-12 04:48 61° 39' 38" S  31° 6' 39" W  View metadata report for BODC series reference number 1795696
17957032016-04-12 10:38 61° 10' 16" S  31° 3' 5" W  View metadata report for BODC series reference number 1795703
17957152016-04-13 04:30 60° 42' 2" S  31° 0' 32" W  View metadata report for BODC series reference number 1795715
17957272016-04-13 08:28 60° 18' 52" S  30° 57' 28" W  View metadata report for BODC series reference number 1795727
17957392016-04-13 12:36 60° 0' 3" S  30° 56' 16" W  View metadata report for BODC series reference number 1795739
17957402016-04-13 04:20 59° 45' 55" S  30° 54' 25" W  View metadata report for BODC series reference number 1795740
17957522016-04-13 09:10 59° 26' 15" S  30° 51' 38" W  View metadata report for BODC series reference number 1795752
17957642016-04-14 02:08 59° 3' 2" S  30° 49' 58" W  View metadata report for BODC series reference number 1795764
17957762016-04-14 07:06 58° 38' 3" S  30° 49' 27" W  View metadata report for BODC series reference number 1795776
17957882016-04-14 12:40 58° 12' 40" S  30° 49' 5" W  View metadata report for BODC series reference number 1795788
17958072016-04-14 06:25 57° 48' 6" S  30° 49' 54" W  View metadata report for BODC series reference number 1795807
17958192016-04-15 01:04 57° 27' 27" S  31° 19' 49" W  View metadata report for BODC series reference number 1795819
17958202016-04-15 06:47 57° 7' 10" S  31° 48' 48" W  View metadata report for BODC series reference number 1795820
17958322016-04-15 12:41 56° 46' 35" S  32° 18' 12" W  View metadata report for BODC series reference number 1795832
17958442016-04-15 06:10 56° 22' 54" S  32° 52' 22" W  View metadata report for BODC series reference number 1795844
17958562016-04-16 12:06 55° 59' 28" S  33° 25' 18" W  View metadata report for BODC series reference number 1795856
17958682016-04-16 04:40 55° 43' 30" S  33° 47' 3" W  View metadata report for BODC series reference number 1795868
17958812016-04-16 10:00 55° 29' 11" S  34° 7' 54" W  View metadata report for BODC series reference number 1795881
17958932016-04-16 02:10 55° 17' 19" S  34° 24' 9" W  View metadata report for BODC series reference number 1795893
17959002016-04-16 04:22 55° 15' 35" S  34° 26' 35" W  View metadata report for BODC series reference number 1795900
17959122016-04-16 06:10 55° 13' 49" S  34° 29' 22" W  View metadata report for BODC series reference number 1795912
17959242016-04-16 07:23 55° 12' 55" S  34° 30' 27" W  View metadata report for BODC series reference number 1795924
17959362016-04-17 12:46 54° 21' 55" S  36° 22' 15" W  View metadata report for BODC series reference number 1795936
17959482016-04-17 04:36 54° 19' 30" S  36° 23' 3" W  View metadata report for BODC series reference number 1795948
17959612016-04-17 05:41 54° 18' 8" S  36° 24' 2" W  View metadata report for BODC series reference number 1795961
17959732016-04-17 06:42 54° 16' 41" S  36° 25' 14" W  View metadata report for BODC series reference number 1795973
17959852016-04-17 07:35 54° 15' 33" S  36° 26' 6" W  View metadata report for BODC series reference number 1795985
17959972016-04-18 12:49 54° 13' 28" S  36° 25' 22" W  View metadata report for BODC series reference number 1795997
17960002016-04-18 01:39 54° 13' 31" S  36° 26' 11" W  View metadata report for BODC series reference number 1796000
17960122016-04-18 02:35 54° 13' 29" S  36° 27' 2" W  View metadata report for BODC series reference number 1796012
17960242016-04-18 03:27 54° 13' 29" S  36° 27' 46" W  View metadata report for BODC series reference number 1796024
17960362016-04-18 04:10 54° 13' 6" S  36° 27' 58" W  View metadata report for BODC series reference number 1796036
17960482016-04-18 05:00 54° 12' 34" S  36° 27' 57" W  View metadata report for BODC series reference number 1796048
17960612016-04-18 05:54 54° 11' 58" S  36° 27' 58" W  View metadata report for BODC series reference number 1796061
17960732016-04-21 04:44 54° 7' 43" S  36° 16' 27" W  View metadata report for BODC series reference number 1796073
17960852016-04-21 06:35 53° 58' 5" S  35° 55' 45" W  View metadata report for BODC series reference number 1796085
17960972016-04-21 08:30 53° 48' 28" S  35° 35' 8" W  View metadata report for BODC series reference number 1796097
1  Meteorological data logger
Air pressure
Wind strength and direction
Atmospheric humidity
Horizontal spatial co-ordinates
Visible waveband radiance and irradiance measurements in the atmosphere
Date and time
Air temperature
Air pressure
Wind strength and direction
Atmospheric humidity
Horizontal spatial co-ordinates
Visible waveband radiance and irradiance measurements in the atmosphere
Date and time
Air temperature

BODC idDate/TimeLocationDoc.
18068742016-03-31 20:10  — 2016-04-25 18:53 68° 10' 24" S  58° 28' 54" W — 51° 37' 21" S  26° 47' 9" W  View metadata report for BODC series reference number 1806874
1  Multiple instrument types
Transmittance and attenuance of the water column
Metadata parameters
Chlorophyll pigment concentrations in water bodies
Salinity of the water column
Horizontal spatial co-ordinates
Temperature of the water column
Date and time
Transmittance and attenuance of the water column
Metadata parameters
Chlorophyll pigment concentrations in water bodies
Salinity of the water column
Horizontal spatial co-ordinates
Temperature of the water column
Date and time

BODC idDate/TimeLocationDoc.
18068862016-03-31 20:10  — 2016-04-25 18:53 68° 10' 24" S  58° 28' 54" W — 51° 37' 21" S  26° 47' 9" W  View metadata report for BODC series reference number 1806886
1  Single-beam echosounder
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation
Horizontal spatial co-ordinates
Date and time
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation
Horizontal spatial co-ordinates
Date and time

BODC idDate/TimeLocationDoc.
18068622016-03-31 20:10  — 2016-04-25 18:53 68° 10' 24" S  58° 28' 54" W — 51° 37' 21" S  26° 47' 9" W  View metadata report for BODC series reference number 1806862