Cruise inventory

RRS James Clark Ross JR20111127 (JR254D, JR264, JR265)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20111127 (JR254D, JR264, JR265)
Cruise period2011-11-27 — 2011-12-24
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesJR265: This cruise carried out the 17th complete occupation of the Drake Passage CTD section, established during the World Ocean Circulation Experiment as repeat section SR1b. It was first occupied by the National Oceanography Centre (previously IOSDL and then SOC) in collaboration with the British Antarctic Survey in 1993, and has been re-occupied most years since then. Thirty two full depth stations were performed during JR265: two test stations, and all 30 of the nominal stations for the SR1b Drake Passage section. The northern-most 9 stations have been shifted from their nominal positions to lie along 58˚W, as for JC031 (Feb-Mar 2009). An initial result is that the estimated total transport measured across the section was 133 Sv which compares well to an average transport measured from the 16 previous UK cruises of 135 Sv (standard deviation of 7 Sv).
This hydrographic cruise, was carried out in conjunction with both cruise JR245D, a "Waves Aerosol and Gas Exchange Study" (WAGES) intensive observation cruise, and cruise JR264, led by NOC-L staff.
The CTD was an underwater SBE 9 plus unit equipped with the following sensors: dual temperature and conductivity sensors, a pressure sensor encased in the SBE underwater unit, a SBE-43 oxygen probe, an Aquatracka MKIII fluorometer, a transmissometer, an upward- looking downwelling PAR sensor, and an altimeter. A downward-looking LADCP (RDI Workhorse Monitor 300 kHz) was deployed on all stations. Various underway measurements were obtained, including navigation, VM-ADCP, sea surface temperature and salinity, water depth and various meteorological parameters. A practical aim during this cruise was to update the detailed guides for each of the hydrographic data streams which were first written during JR195 in 2009. The hydrographic data analysis was performed using "MSTAR", a suite of Matlab programs developed at NOCS by Brian King and used on the JCR for the first time during JR195.
Chief scientistMargaret J Yelland (National Oceanography Centre, Southampton), Miguel Angel Morales Maqueda (National Oceanography Centre, Liverpool)
Cruise reportRRS James Clark Ross JR20111127 (JR254D, JR264, JR265) cruise report jr265.pdf — access key 'C' (1.93 MB) 
Ocean/sea areas 
GeneralSouthern Ocean
SpecificDrake Passage
Track chartsRRS James Clark Ross JR20111127 (JR254D, JR264, JR265) cruise track — jr265trk.pdf (0.04 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 11
Description: Underway salinity, temperature, transmittance and fluorescence from SurfMet system
Surface measurements underway (T,S)Quantity: activity duration in days = 11
Description: Discrete salinity samples from underway supply, analysed using an Autosal salinometer. Used to calibrate underway salinity sensor in the OceanLogger system
BathythermographQuantity: activity duration in days = 11
Description: Sea floor depth using a Kongsberg EA600 single beam and EM122 multi-beam echo sounders
Water bottle stationsQuantity: number of stations = 32
Description: Discrete salinity samples collected from CTD bottles: CTD frame fitted with SBE 32, 24-way carousel and 24 x 12 L niskin bottles. Samples analysed using an Autosal salinometer. Used to calibrate CTD salinity
CTD stationsQuantity: number of stations = 32
Description: Temperature, conductivity, pressure, transmittance, fluorescence, oxygen and back scatter using a SeaBird SBE 9 plus mounted on a stainless steel CTD frame. Station depths ranged from 1.7 - 5702 m
CTD stationsQuantity: number of stations = 32
Description: Sea water velocities using a RDI WH monitor 300 kHz lowered acoustic doppler current profiler (LADCP)
Subsurface temperature and salinity measurementsQuantity: activity duration in days = 11
Description: Sea floor depth using a Kongsberg EA600 single beam and EM122 multi-beam echo sounders
Subsurface temperature and salinity measurementsQuantity: activity duration in days = 11
Description: Water velocities using a 75 kHz RD Instruments OS75 vessel mounted acoustic doppler current profiler (VMADCP)
Transparency (eg transmissometer)Quantity: activity duration in days = 11
Description: Underway salinity, temperature, transmittance and fluorescence from SurfMet system
Transparency (eg transmissometer)Quantity: number of stations = 32
Description: Temperature, conductivity, pressure, transmittance, fluorescence, oxygen and back scatter using a SeaBird SBE 9 plus mounted on a stainless steel CTD frame. Station depths ranged from 1.7 - 5702 m
Optics (eg underwater light levels)Quantity: activity duration in days = 11
Description: Underway salinity, temperature, transmittance and fluorescence from SurfMet system
Current profiler (eg ADCP)Quantity: number of stations = 32
Description: Sea water velocities using a RDI WH monitor 300 kHz lowered acoustic doppler current profiler (LADCP)
Current profiler (eg ADCP)Quantity: activity duration in days = 11
Description: Water velocities using a 75 kHz RD Instruments OS75 vessel mounted acoustic doppler current profiler (VMADCP)
Meteorology 
Routine standard measurementsQuantity: activity duration in days = 11
Description: Underway atmospheric pressure, air temperature, air humidity, total irradiance (TIR), photosynthetic radiation (PAR) from the OceanLogger system and wind speed and wind direction from the met system.
Moorings, landers, buoys 
Physical oceanography 
Neutrally buoyant floats55° 9' 26" S  58° 0' 0" W — 29/11/11 14:20 GMT (CTD station 007). Deployed Met Office Argo float serial no 4900. Pressure, temperature and conductivity profiles over 5 - 2000 db
Neutrally buoyant floats56° 8' 24" S  57° 34' 14" W — 2/12/11 02:33 GMT (CTD station 011). Deployed Met Office Argo float serial no 4901. Pressure, temperature and conductivity profiles over 5 - 2000 db
Neutrally buoyant floats59° 59' 57" S  55° 14' 19" W — 4/12/11 10:51 GMT (CTD station 023). Deployed Met Office Argo float serial no 4998. Pressure, temperature and conductivity profiles over 5 - 2000 db
Neutrally buoyant floats58° 3' 5" S  56° 26' 47" W — 3/12/11 07:13 GMT (CTD station 017). Deployed Met Office Argo float serial no 4903. Pressure, temperature and conductivity profiles over 5 - 2000 db
Neutrally buoyant floats59° 0' 0" S  55° 51' 47" W — 3/12/11 21:09 GMT (CTD station 020). Deployed Met Office Argo float serial no 4999. Pressure, temperature and conductivity profiles over 5 - 2000 db
Neutrally buoyant floats57° 5' 55" S  57° 0' 25" W — 2/12/11 16:26 GMT (CTD station 014). Deployed Met Office Argo float serial no 4902. Pressure, temperature and conductivity profiles over 5 - 2000 db
Data held at BODC 
Series/Profiles 
31  CTD/STD cast
Density of 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
Dissolved oxygen parameters in the water column
Reference numbers
Density of 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
Dissolved oxygen parameters in the water column
Reference numbers

BODC idDate/TimeLocationDoc.
13635122011-11-28 21:55:48  — 2011-11-28 22:01:15 54° 47' 21" S  57° 59' 44" W  View metadata report for BODC series reference number 1363512
13635242011-11-28 23:21:08  — 2011-11-28 23:32:31 54° 54' 33" S  57° 59' 37" W  View metadata report for BODC series reference number 1363524
13635362011-11-29 01:39:11  — 2011-11-29 01:59:04 54° 58' 48" S  57° 58' 30" W  View metadata report for BODC series reference number 1363536
13635482011-11-29 03:33:51  — 2011-11-29 03:59:41 54° 59' 56" S  57° 59' 49" W  View metadata report for BODC series reference number 1363548
13635612011-11-29 05:11:15  — 2011-11-29 05:47:25 55° 2' 21" S  57° 59' 53" W  View metadata report for BODC series reference number 1363561
13635732011-11-29 11:04:44  — 2011-11-29 11:48:52 55° 5' 40" S  57° 59' 57" W  View metadata report for BODC series reference number 1363573
13635852011-11-29 13:49:34  — 2011-11-29 14:41:47 55° 9' 26" S  58° 0' 3" W  View metadata report for BODC series reference number 1363585
13635972011-11-29 16:43:08  — 2011-11-29 17:44:49 55° 11' 58" S  57° 59' 24" W  View metadata report for BODC series reference number 1363597
13636042011-11-29 21:38:49  — 2011-11-29 22:49:09 55° 31' 19" S  58° 1' 13" W  View metadata report for BODC series reference number 1363604
13636162011-12-01 18:44:05  — 2011-12-01 20:11:08 55° 49' 55" S  57° 48' 42" W  View metadata report for BODC series reference number 1363616
13636282011-12-02 01:09:28  — 2011-12-02 02:10:16 56° 8' 42" S  57° 35' 44" W  View metadata report for BODC series reference number 1363628
13636412011-12-02 05:51:19  — 2011-12-02 06:52:47 56° 27' 55" S  57° 25' 7" W  View metadata report for BODC series reference number 1363641
13636532011-12-02 10:42:16  — 2011-12-02 11:43:32 56° 47' 3" S  57° 13' 6" W  View metadata report for BODC series reference number 1363653
13636652011-12-02 15:20:29  — 2011-12-02 16:27:32 57° 6' 2" S  57° 1' 14" W  View metadata report for BODC series reference number 1363665
13636772011-12-02 20:45:52  — 2011-12-02 21:47:12 57° 24' 57" S  56° 49' 34" W  View metadata report for BODC series reference number 1363677
13636892011-12-03 01:19:22  — 2011-12-03 02:18:21 57° 43' 59" S  56° 38' 34" W  View metadata report for BODC series reference number 1363689
13636902011-12-03 05:54:23  — 2011-12-03 07:01:36 58° 3' 3" S  56° 26' 45" W  View metadata report for BODC series reference number 1363690
13637082011-12-03 10:39:11  — 2011-12-03 11:44:01 58° 22' 0" S  56° 15' 1" W  View metadata report for BODC series reference number 1363708
13637212011-12-03 15:16:56  — 2011-12-03 16:20:15 58° 41' 1" S  56° 3' 14" W  View metadata report for BODC series reference number 1363721
13637332011-12-03 19:58:43  — 2011-12-03 21:01:14 59° 0' 0" S  55° 51' 28" W  View metadata report for BODC series reference number 1363733
13637452011-12-04 00:37:31  — 2011-12-04 01:41:02 59° 19' 59" S  55° 39' 3" W  View metadata report for BODC series reference number 1363745
13637572011-12-04 05:07:18  — 2011-12-04 06:09:42 59° 40' 0" S  55° 26' 39" W  View metadata report for BODC series reference number 1363757
13637692011-12-04 09:37:26  — 2011-12-04 10:37:09 59° 59' 58" S  55° 14' 17" W  View metadata report for BODC series reference number 1363769
13637702011-12-04 14:26:36  — 2011-12-04 15:24:20 60° 19' 59" S  55° 1' 53" W  View metadata report for BODC series reference number 1363770
13637822011-12-04 18:56:49  — 2011-12-04 19:48:01 60° 39' 49" S  54° 48' 18" W  View metadata report for BODC series reference number 1363782
13637942011-12-04 22:00:52  — 2011-12-04 22:44:05 60° 47' 58" S  54° 44' 35" W  View metadata report for BODC series reference number 1363794
13638012011-12-05 01:44:11  — 2011-12-05 02:33:44 60° 49' 59" S  54° 43' 18" W  View metadata report for BODC series reference number 1363801
13638132011-12-05 03:43:11  — 2011-12-05 04:01:10 60° 51' 1" S  54° 42' 39" W  View metadata report for BODC series reference number 1363813
13638252011-12-05 14:10:44  — 2011-12-05 14:22:13 60° 58' 51" S  54° 37' 48" W  View metadata report for BODC series reference number 1363825
13638372011-12-05 15:27:45  — 2011-12-05 15:34:48 61° 3' 0" S  54° 35' 13" W  View metadata report for BODC series reference number 1363837
13638502011-11-28 12:33:20  — 2011-11-28 13:14:05 53° 27' 41" S  57° 56' 47" W  View metadata report for BODC series reference number 1363850
Discrete samples 
31  CTD frame plus rosette samplerSalinity of the water column
38  Sample taken from ship's non-toxic supplySalinity of the water column