Cruise inventory

RRS James Clark Ross JR20100315 (JR235, JR236, JR239)

Cruise summary report

Cruise inventory

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20100315 (JR235, JR236, JR239)
Cruise period2010-03-19 — 2010-04-24
StatusCompleted
Port of departureMontevideo, Uruguay
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesJR235 is a project of the BAS Polar Oceans research programme, working here collaboratively with groups from NOC and UEA (who were onboard primarily for JR239). JR235 is a near-meridional section, running from the northern Weddell Sea, across the Scotia Sea, and up to South Georgia, along which we conducted full-depth CTD/LADCP stations, and drew water samples for measurements of transient tracers (CFCs, SF6), oxygen and nutrients, carbonate system parameters and other oceanographic tracers. This line was first occupied during WOCE in 1995, and has been repeated twice since (1999 and 2005). The primary use of the data will be to assess changes in properties of Antarctic Bottom Water (AABW) as it flows from its source regions in the Weddell Sea, through the Scotia Sea, and into the abyssal layers of the global ocean.

JR236 is a swath bathymetry survey of the Orkney Passage, a deep gap just east of the South Orkney islands on the South Scotia Ridge. This passage is a key region of outflow of AABW from the Weddell Sea, and the BAS Polar Oceans programme (in conjunction with Lamont-Doherty Earth Observatory in the US) is funded to deploy and maintain current meter moorings here. A few such moorings already exist, and prior to scaling-up the moorings effort here, it was deemed sensible to better map the seabed of Orkney Passage, to ensure that the moorings are put in the most effective locations, and to help with interpretation of the data when they are recovered. This was the purpose of JR236, during which we mapped the ocean bed here in unprecedented detail, using the James Clark Ross' multibeam echosounder.

JR239 is a near-zonal section along the South Scotia Ridge (and extending eastward beyond the end of the ridge to around 17.5 degW), as part of the Antarctic Deep Water Rates of Export (ANDREX) project. This is an Antarctic Funding Initiative project that began last year with a cruise on RRS James Cook, but which was cut short because of a medical emergency. (NERC consequently provided with a second trenche of fieldwork funding, which has enabled us to complete the fieldwork this year from James Clark Ross). As part of this year's ANDREX cruise (JR239) we have conducted full-depth CTD/CO2/tracer stations along the northern boundary of the Weddell Gyre. When concatenated with last year's ANDREX cruise, and a US-occupied section at the eastern side of the Weddell Gyre (CLIVAR I6S), we will have a complete box of stations around the periphery of the gyre. This will enable us to construct budgets of key parameters such as heat, volume, carbon etc. into and out of the Weddell Gyre, including those associated with AABW.
Chief scientistMike Meredith (British Antarctic Survey)
ProjectAntarctic Deep Water Rates of Export (ANDREX) & BAS Polar Oceans research programme
Coordinating bodyBritish Antarctic Survey
Cruise reportRRS James Clark Ross JR20100315 (JR235, JR236, JR239) cruise report jr235_236_239.pdf — access key 'C' (5.11 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
SpecificWeddell Sea, Scotia Sea, with passage in Argentine Basin (Southwest Atlantic, underway measurements only, plus test CTD station)
Track chartsRRS James Clark Ross JR20100315 (JR235, JR236, JR239) cruise track — jr235_236_239trk.pdf (0.15 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 9000
Description: Underway thermosalinograph data, including surface temperature, salinity, fluorescence
CTD stationsQuantity: number of stations = 94
Description: Vertical profiles from Niskin bottles measurements: salinity
CTD stationsQuantity: number of stations = 97
Description: Vertical profiles of temperature, salinity, pressure, dissolved oxygen, fluorescence from Conductivity/Temperature/Depth system
Geochemical tracers (eg freons)Quantity: number of stations = 70
Description: Vertical profiles from Niskin bottle measurements: chlorofluorocarbons (CFCs), carbon tetrachloride (CCl4), sulphur hexafluoride (SF6)
Current profiler (eg ADCP)Quantity: number of stations = 97
Description: Vertical profiles of velocity from Lowered Acoustic Doppler Current Profiler
Current profiler (eg ADCP)Quantity: track kilometres = 9000
Description: Underway shipboard ADCP data
Chemical oceanography 
OxygenQuantity: number of stations = 95
Description: Vertical profiles from Niskin bottle measurements: dissolved oxygen
Carbon dioxideQuantity: number of stations = 53
Description: Vertical profiles from Niskin bottle measurements: dissolved inorganic carbon (DIC) and total alkalinity (TA)
PhosphateQuantity: number of stations = 93
Description: Vertical profiles from Niskin bottles measurements: dissolved nutrients (nitrate, phosphate, silicate)
NitrateQuantity: number of stations = 93
Description: Vertical profiles from Niskin bottles measurements: dissolved nutrients (nitrate, phosphate, silicate)
SilicateQuantity: number of stations = 93
Description: Vertical profiles from Niskin bottles measurements: dissolved nutrients (nitrate, phosphate, silicate)
AlkalinityQuantity: number of stations = 53
Description: Vertical profiles from Niskin bottle measurements: dissolved inorganic carbon (DIC) and total alkalinity (TA)
IsotopesQuantity: number of stations = 25
Description: Vertical profiles from Niskin bottles for Tritium analyses (samples stored for analysis ashore)
IsotopesQuantity: number of stations = 57
Description: Vertical profiles from Niskin bottles for stable oxygen isotope analyses (samples stored for analysis ashore)
IsotopesQuantity: number of stations = 14
Description: Vertical profiles from Niskin bottles for Carbon-14 analyses (samples stored for analysis ashore)
Other chemical oceanographic measurementsQuantity: number of stations = 44
Description: Vertical profiles from Niskin bottles for noble gas analyses (samples stored for analysis ashore)
Meteorology 
Incident radiationQuantity: track kilometres = 9000
Description: Underway surface meteorology, including surface atmospheric pressure, wind speed/direction, total incident radiation, photosynthetically-active radiation, air temperature, humidity
Routine standard measurementsQuantity: track kilometres = 9000
Description: Underway surface meteorology, including surface atmospheric pressure, wind speed/direction, total incident radiation, photosynthetically-active radiation, air temperature, humidity
Geology and geophysics 
Single-beam echosoundingQuantity: track kilometres = 9000
Description: Single-beam echosounder data
Multi-beam echosoundingQuantity: track kilometres = 9000
Description: Multibeam (swath) echosounder data
Moorings, landers, buoys 
Physical oceanography 
Surface drifters/drifting buoys57° 9' 47" S  56° 58' 30" W — Argo profiling float, number 3170. Deployed 1900 GMT on 24 March 2010
Surface drifters/drifting buoys63° 57' 54" S  28° 52' 30" W — Argo profiling float, number 4502. Deployed 1545 GMT on 14 April 2010
Surface drifters/drifting buoys60° 47' 42" S  39° 51' 41" W — Argo profiling float, number 4501. Deployed 0945 GMT on 3 April 2010
Data held at BODC 
Series/Profiles 
95  CTD/STD cast
Density of the water column
Electrical conductivity of the water column
Dissolved oxygen parameters in the water column
Temperature of the water column
Salinity of the water column
Reference numbers
Vertical spatial coordinates
Chlorophyll pigment concentrations in the water column
[Show series]
Density of the water column
Electrical conductivity of the water column
Dissolved oxygen parameters in the water column
Temperature of the water column
Salinity of the water column
Reference numbers
Vertical spatial coordinates
Chlorophyll pigment concentrations in the water column
[Hide series]

BODC idDate/TimeLocationDoc.
10458642010-03-25 21:39:51 62° 30' 17" S  56° 47' 32" W  View metadata report for BODC series reference number 1045864
10458762010-03-26 01:00:27 62° 10' 15" S  56° 40' 13" W  View metadata report for BODC series reference number 1045876
10458882010-03-26 08:27:02 61° 23' 34" S  56° 41' 35" W  View metadata report for BODC series reference number 1045888
10459072010-03-26 16:07:31 61° 2' 27" S  54° 24' 19" W  View metadata report for BODC series reference number 1045907
10459192010-03-26 18:18:38 60° 57' 50" S  54° 10' 16" W  View metadata report for BODC series reference number 1045919
10459202010-03-26 21:50:30 60° 44' 10" S  53° 22' 17" W  View metadata report for BODC series reference number 1045920
10459322010-03-27 01:48:19 60° 26' 39" S  52° 49' 48" W  View metadata report for BODC series reference number 1045932
10459442010-03-27 04:33:02 60° 32' 55" S  52° 21' 10" W  View metadata report for BODC series reference number 1045944
10459562010-03-27 08:00:36 60° 22' 13" S  51° 53' 9" W  View metadata report for BODC series reference number 1045956
10459682010-03-27 10:28:47 60° 17' 18" S  51° 23' 12" W  View metadata report for BODC series reference number 1045968
10459812010-03-27 12:34:56 60° 15' 10" S  51° 11' 38" W  View metadata report for BODC series reference number 1045981
10459932010-03-27 15:29:08 60° 13' 27" S  50° 55' 54" W  View metadata report for BODC series reference number 1045993
10460072010-03-27 18:16:08 60° 11' 35" S  50° 32' 43" W  View metadata report for BODC series reference number 1046007
10460192010-03-27 21:00:22 60° 13' 26" S  50° 2' 32" W  View metadata report for BODC series reference number 1046019
10460202010-03-28 02:00:28 60° 12' 24" S  49° 16' 45" W  View metadata report for BODC series reference number 1046020
10460322010-03-28 05:40:03 60° 9' 55" S  48° 35' 4" W  View metadata report for BODC series reference number 1046032
10460442010-03-28 09:06:02 60° 8' 46" S  48° 16' 36" W  View metadata report for BODC series reference number 1046044
10460562010-03-28 12:56:02 60° 8' 58" S  48° 7' 23" W  View metadata report for BODC series reference number 1046056
10460682010-03-28 21:21:38 60° 7' 34" S  47° 41' 44" W  View metadata report for BODC series reference number 1046068
10460812010-03-29 00:50 60° 8' 51" S  47° 20' 8" W  View metadata report for BODC series reference number 1046081
10460932010-03-29 04:32:37 60° 21' 17" S  46° 46' 6" W  View metadata report for BODC series reference number 1046093
10461002010-03-29 17:08:27 60° 55' 12" S  43° 59' 58" W  View metadata report for BODC series reference number 1046100
10461122010-03-29 20:34:17 60° 45' 35" S  42° 57' 35" W  View metadata report for BODC series reference number 1046112
10461242010-03-29 22:36:40 60° 44' 23" S  42° 47' 23" W  View metadata report for BODC series reference number 1046124
10461362010-03-31 21:56:42 60° 40' 47" S  42° 23' 24" W  View metadata report for BODC series reference number 1046136
10461482010-04-01 00:19:28 60° 39' 36" S  42° 18' 35" W  View metadata report for BODC series reference number 1046148
10461612010-04-01 03:25:30 60° 38' 59" S  42° 12' 33" W  View metadata report for BODC series reference number 1046161
10461732010-04-01 07:18:53 60° 38' 58" S  42° 11' 22" W  View metadata report for BODC series reference number 1046173
10461852010-04-01 11:04:33 60° 38' 24" S  42° 10' 12" W  View metadata report for BODC series reference number 1046185
10461972010-04-01 19:12:41 60° 37' 47" S  42° 5' 22" W  View metadata report for BODC series reference number 1046197
10462042010-04-03 17:26:17 60° 36' 34" S  41° 58' 28" W  View metadata report for BODC series reference number 1046204
10462162010-04-03 22:29:45 60° 35' 24" S  41° 49' 47" W  View metadata report for BODC series reference number 1046216
10462282010-04-04 03:36:46 60° 34' 11" S  41° 41' 28" W  View metadata report for BODC series reference number 1046228
10462412010-04-04 07:30:44 60° 31' 49" S  41° 22' 48" W  View metadata report for BODC series reference number 1046241
10462532010-04-04 10:40:08 60° 28' 11" S  40° 58' 47" W  View metadata report for BODC series reference number 1046253
10462652010-04-04 14:57:41 60° 25' 48" S  40° 4' 11" W  View metadata report for BODC series reference number 1046265
10462772010-04-04 18:23:23 60° 24' 35" S  39° 18' 0" W  View metadata report for BODC series reference number 1046277
10462892010-04-04 21:27:45 60° 24' 35" S  39° 7' 10" W  View metadata report for BODC series reference number 1046289
10462902010-04-05 01:32:46 60° 25' 13" S  38° 42' 32" W  View metadata report for BODC series reference number 1046290
10463082010-04-05 06:19:19 60° 26' 24" S  38° 0' 0" W  View metadata report for BODC series reference number 1046308
10463212010-04-05 14:54:29 60° 27' 36" S  37° 22' 11" W  View metadata report for BODC series reference number 1046321
10463332010-04-05 20:24:34 60° 22' 43" S  36° 24' 4" W  View metadata report for BODC series reference number 1046333
10463452010-04-06 16:30:34 60° 18' 11" S  35° 28' 32" W  View metadata report for BODC series reference number 1046345
10463572010-04-06 20:27:20 60° 8' 21" S  34° 53' 26" W  View metadata report for BODC series reference number 1046357
10463692010-04-06 23:19:28 60° 1' 49" S  34° 28' 18" W  View metadata report for BODC series reference number 1046369
10463702010-04-07 03:21:16 59° 55' 49" S  33° 50' 56" W  View metadata report for BODC series reference number 1046370
10463822010-04-07 06:50:01 59° 50' 58" S  33° 16' 46" W  View metadata report for BODC series reference number 1046382
10463942010-04-07 09:47:43 59° 51' 35" S  33° 9' 35" W  View metadata report for BODC series reference number 1046394
10464012010-04-07 13:10:35 59° 51' 36" S  33° 4' 15" W  View metadata report for BODC series reference number 1046401
10464132010-04-07 17:17:06 59° 52' 48" S  32° 56' 59" W  View metadata report for BODC series reference number 1046413
10464252010-04-07 21:21:41 59° 53' 24" S  32° 51' 35" W  View metadata report for BODC series reference number 1046425
10464372010-04-08 00:31:51 59° 53' 59" S  32° 48' 30" W  View metadata report for BODC series reference number 1046437
10464492010-04-08 04:04:58 59° 54' 1" S  32° 43' 51" W  View metadata report for BODC series reference number 1046449
10464502010-04-08 07:22:27 59° 56' 23" S  32° 14' 29" W  View metadata report for BODC series reference number 1046450
10464622010-04-08 11:12:38 59° 58' 11" S  31° 28' 47" W  View metadata report for BODC series reference number 1046462
10464742010-04-08 15:48:39 60° 19' 10" S  30° 57' 39" W  View metadata report for BODC series reference number 1046474
10464862010-04-08 21:57:34 60° 28' 9" S  29° 44' 10" W  View metadata report for BODC series reference number 1046486
10464982010-04-09 05:07:29 60° 41' 8" S  28° 15' 48" W  View metadata report for BODC series reference number 1046498
10465052010-04-09 09:49:51 60° 47' 52" S  27° 25' 33" W  View metadata report for BODC series reference number 1046505
10465172010-04-09 13:38:05 60° 49' 36" S  27° 13' 42" W  View metadata report for BODC series reference number 1046517
10465292010-04-09 21:09:08 61° 0' 53" S  25° 44' 46" W  View metadata report for BODC series reference number 1046529
10465302010-04-10 05:32:59 61° 13' 50" S  24° 15' 39" W  View metadata report for BODC series reference number 1046530
10465422010-04-10 12:51:54 61° 25' 48" S  22° 46' 15" W  View metadata report for BODC series reference number 1046542
10465542010-04-10 21:30:18 61° 37' 52" S  21° 17' 1" W  View metadata report for BODC series reference number 1046554
10465662010-04-11 07:04:38 61° 49' 57" S  19° 47' 49" W  View metadata report for BODC series reference number 1046566
10465782010-04-11 18:01:47 61° 25' 51" S  17° 4' 28" W  View metadata report for BODC series reference number 1046578
10465912010-04-14 12:27:01 63° 57' 55" S  28° 52' 30" W  View metadata report for BODC series reference number 1046591
10466092010-04-14 19:15:17 63° 20' 48" S  29° 34' 4" W  View metadata report for BODC series reference number 1046609
10466102010-04-15 01:45:12 63° 4' 22" S  30° 6' 54" W  View metadata report for BODC series reference number 1046610
10466222010-04-15 07:59:29 62° 46' 57" S  30° 41' 40" W  View metadata report for BODC series reference number 1046622
10466342010-04-15 13:45:55 62° 29' 29" S  31° 15' 43" W  View metadata report for BODC series reference number 1046634
10466462010-04-15 19:36:44 62° 4' 31" S  31° 10' 57" W  View metadata report for BODC series reference number 1046646
10466582010-04-16 03:10:55 61° 33' 5" S  31° 6' 15" W  View metadata report for BODC series reference number 1046658
10466712010-04-16 08:55:23 61° 10' 15" S  31° 2' 43" W  View metadata report for BODC series reference number 1046671
10466832010-04-16 12:37:06 61° 6' 33" S  31° 2' 27" W  View metadata report for BODC series reference number 1046683
10466952010-04-16 16:59:41 60° 41' 57" S  31° 0' 32" W  View metadata report for BODC series reference number 1046695
10467022010-04-16 22:37:19 59° 59' 40" S  30° 55' 46" W  View metadata report for BODC series reference number 1046702
10467142010-04-17 03:05:17 59° 45' 58" S  30° 54' 19" W  View metadata report for BODC series reference number 1046714
10467262010-04-17 07:13:11 59° 40' 25" S  30° 53' 44" W  View metadata report for BODC series reference number 1046726
10467382010-04-17 11:01:32 59° 26' 8" S  30° 51' 36" W  View metadata report for BODC series reference number 1046738
10467512010-04-17 15:47:14 59° 2' 58" S  30° 49' 52" W  View metadata report for BODC series reference number 1046751
10467632010-04-17 20:29:43 58° 38' 6" S  30° 49' 28" W  View metadata report for BODC series reference number 1046763
10467752010-04-18 02:36:40 58° 12' 47" S  30° 49' 19" W  View metadata report for BODC series reference number 1046775
10467872010-04-18 08:45:05 57° 48' 4" S  30° 49' 57" W  View metadata report for BODC series reference number 1046787
10467992010-04-18 14:01:45 57° 27' 29" S  31° 19' 38" W  View metadata report for BODC series reference number 1046799
10468062010-04-18 19:03:45 57° 7' 6" S  31° 48' 52" W  View metadata report for BODC series reference number 1046806
10468182010-04-19 00:57:48 56° 46' 32" S  32° 18' 13" W  View metadata report for BODC series reference number 1046818
10468312010-04-19 06:56:23 56° 22' 50" S  32° 52' 20" W  View metadata report for BODC series reference number 1046831
10468432010-04-19 12:15:06 55° 59' 26" S  33° 25' 9" W  View metadata report for BODC series reference number 1046843
10468552010-04-19 16:42:15 55° 43' 32" S  33° 47' 7" W  View metadata report for BODC series reference number 1046855
10468672010-04-19 21:25:34 55° 29' 5" S  34° 7' 59" W  View metadata report for BODC series reference number 1046867
10468792010-04-20 02:00:31 55° 15' 35" S  34° 26' 36" W  View metadata report for BODC series reference number 1046879
10468802010-04-20 04:49:50 55° 12' 54" S  34° 30' 28" W  View metadata report for BODC series reference number 1046880
10468922010-04-01 15:08:15 60° 38' 59" S  42° 11' 23" W  View metadata report for BODC series reference number 1046892
10469112010-03-22 12:19:11 47° 41' 29" S  57° 3' 59" W  View metadata report for BODC series reference number 1046911
Discrete samples 
78  Sample taken from ship's non-toxic supplySalinity of the water column