Cruise inventory

RRS James Clark Ross JR20140309 (JR293 Leg1, JR299 Leg1, UKD-5)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20140309 (JR293 Leg1, JR299 Leg1, UKD-5)
Cruise period2014-03-08 — 2014-03-29
StatusCompleted
Port of departureRothera, Antarctica
Port of returnPunta Arenas, Chile
PurposeResearch
ObjectivesThe voyage JR299 on the RRS James Clark Ross was an amalgamation of the following cruises: JR293, JR272C and JR273B. It also included a three day extension in which to turn around two Lamont-Doherty Earth Observatory (LDEO) moorings in the Weddell Sea. JR299 also represents the final voyage of the Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean (DIMES) project that began in 2009. The major field work component of DIMES consisting of five voyages by US collaborators and five (and a half) UK led voyages investigating the spread of a chemical tracer dye release through Drake Passage and other observations of internal ocean mixing in the South East Pacific and Scotia Sea. Because of this JR299 is also designated DIMES UK5.

Due to logistical constraints the cruise was split into two parts. The first was a leg from the BAS Rothera base on Adelaide Island on the Antarctic Peninsula that departed on the 9th of March and proceeded north along the coastline, undertook a CTD and VMP transect of SR1b (JR293) across Drake Passage from Elephant Island to Burdwood Bank, and finished at Punta Arenas on the 24th of March. Personnel disembarked here, notably all those associated with the VMP, and the ship resupplied and refuelled.

SR1 Transect - Drake Passage Repeat Hydrography (JR293): 30 stations across Drake Passage from Elephant Island to Burdwood Bank at the same positions as occupied in previous cruises (15 of the last 18 seasons). Increased to 34 stations to achieve high resolution sampling across the SAF/PF. The VMP and tethered VMP and technicians were only available for this part of the cruise.
Chief scientistAndrew J S Meijers (British Antarctic Survey)
ProjectDiapycnal and Isopycnal Mixing Experiment in the Southern Ocean
Coordinating bodyNatural Environment Research Council (NERC)
Cruise reportRRS James Clark Ross JR20140309 (JR293 Leg1, JR299 Leg1, UKD-5) cruise report jr299.pdf — access key 'C' (6.24 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
Southern Ocean
SpecificDrake Passage, Weddell Sea, Scotia Sea, Argentine Basin
Track chartsRRS James Clark Ross JR20140309 (JR293 Leg1, JR299 Leg1, UKD-5) cruise track — jr299trk.pdf (00 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 9650
Description: Underway water sampling (surface salinity, every ~4 hours when underway)
Surface measurements underway (T,S)Quantity: track kilometres = 9650
Description: Underway ocean measurements
Water bottle stationsQuantity: number of stations = 118
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance. NB - 119 casts were done, one had a problem and no water sampling was done.
CTD stationsQuantity: number of stations = 118
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance. NB - 119 casts were done, one had a problem and no water sampling was done.
Geochemical tracers (eg freons)Quantity: number of stations = 81
Description: CTD water analysis - DIMES Tracer trifluoromethyl sulfurpentafloride. Sampled through water column, targeting density horizons.
Geochemical tracers (eg freons)Quantity: number of stations = 52
Description: CTD water analysis - CFCs/SF6 Sampled through water column.
Current profiler (eg ADCP)Quantity: number of stations = 119
Description: Lowered Acoustic Doppler Current Profiler mounted on CTD frame.
Current profiler (eg ADCP)Quantity: track kilometres = 9650
Description: Ship mounted Acoustic Doppler Current Profiler measurements (75 kHz)
Surface drifters/drifting buoysQuantity: number of deployments = 16
Description: Surface drifters. 6 at high temporal resolution (GPS fix every ~15 minutes), 10 at lower (GPS fix every 2-4 hours). Deployed in 2 arrays. Array 1: -53.25902 S, -45.15368 W to -52.89154 S, -45.51824 W. Array 2: -53.42095 S, -50.21683 W to -53.20238 S, -50.01525 W
Neutrally buoyant floatsQuantity: number of deployments = 8
Description: ARGO floats. Deployed between -52.99198 S, -47.50283 W and -53.29919 S, -48.92516 W.
Other physical oceanographic measurementsQuantity: number of stations = 21
Description: VMP & TVMP Vertical microstructure profiles, free-falling and tethered.
Chemical oceanography 
OxygenQuantity: number of stations = 3
Description: d18O
OxygenQuantity: number of stations = 6
Description: CTD water analysis - Dissolved oxygen. Sampled through water column.
Carbon dioxideQuantity: number of stations = 48
Description: CTD water analysis - Dissolved inorganic carbon. Sampled through water column.
NitrateQuantity: number of stations = 50
Description: CTD water analysis - Nitrate/slicate/Total alkalinity/PH. Sampled through water column.
SilicateQuantity: number of stations = 50
Description: CTD water analysis - Nitrate/slicate/Total alkalinity/PH. Sampled through water column.
AlkalinityQuantity: number of stations = 50
Description: CTD water analysis - Nitrate/slicate/Total alkalinity/PH. Sampled through water column.
pHQuantity: number of stations = 50
Description: CTD water analysis - Nitrate/slicate/Total alkalinity/PH. Sampled through water column.
Trace elementsQuantity: number of stations = 48
Description: CTD water analysis - Barium. Sampled through water column.
IsotopesQuantity: number of stations = 3
Description: d18O
Other chemical oceanographic measurementsQuantity: number of stations = 116
Description: CTD water analysis - Salinity. Sampled through water column.
Meteorology 
Routine standard measurementsQuantity: track kilometres = 9650
Description: Underway meterological measurements
Geology and geophysics 
Single-beam echosoundingQuantity: track kilometres = 9650
Description: EA600 depth data
Multi-beam echosoundingQuantity: track kilometres = 9650
Description: EM122 swath bathymetry data
Moorings, landers, buoys 
Physical oceanography 
Current profiler (eg ADCP)63° 30' 59" S  41° 45' 59" W — Deployment position: -63.52259 S -41.76834 W LDEO Mooring M3b Deployment In addition communication was made with LDEO Mooring M3 that was deployed during JR252 in 2011. It was not possible to recover this mooring due to sea-ice cover.
Current profiler (eg ADCP)62° 36' 0" S  43° 13' 59" W — Recovery position: -62.61782 S -43.24113 LDEO Mooring M2 Recovery. Mooring had been deployed on JR252 in 2011 with the triangulated position: 62 36.924' S 043 14.618' W
Other physical oceanographic measurements63° 30' 59" S  41° 45' 59" W — Deployment position: -63.52259 S -41.76834 W LDEO Mooring M3b Deployment In addition communication was made with LDEO Mooring M3 that was deployed during JR252 in 2011. It was not possible to recover this mooring due to sea-ice cover.
Other physical oceanographic measurements62° 36' 0" S  43° 13' 59" W — Recovery position: -62.61782 S -43.24113 LDEO Mooring M2 Recovery. Mooring had been deployed on JR252 in 2011 with the triangulated position: 62 36.924' S 043 14.618' W
Data held at BODC 
Series/Profiles 
21  Turbulence energy dissipation probe
Turbulence in the water column
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Reference numbers
Turbulence in the water column
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Reference numbers

BODC idDate/TimeLocationDoc.
17343392014-03-18 23:27  — 2014-03-19 00:25 55° 31' 8" S  57° 59' 59" W  View metadata report for BODC series reference number 1734339
17343402014-03-19 05:03  — 2014-03-19 06:04 55° 22' 5" S  57° 59' 57" W  View metadata report for BODC series reference number 1734340
17343522014-03-19 10:36  — 2014-03-19 11:38 55° 12' 51" S  57° 59' 58" W  View metadata report for BODC series reference number 1734352
17343642014-03-19 14:43  — 2014-03-19 15:43 55° 10' 23" S  57° 59' 41" W  View metadata report for BODC series reference number 1734364
17343762014-03-13 17:10  — 2014-03-13 18:11 60° 58' 56" S  54° 37' 44" W  View metadata report for BODC series reference number 1734376
17343882014-03-13 19:50  — 2014-03-13 20:55 60° 50' 59" S  54° 42' 46" W  View metadata report for BODC series reference number 1734388
17344072014-03-13 23:23  — 2014-03-14 00:07 60° 49' 59" S  54° 43' 18" W  View metadata report for BODC series reference number 1734407
17344192014-03-14 04:37  — 2014-03-14 07:53 60° 40' 1" S  54° 49' 28" W  View metadata report for BODC series reference number 1734419
17344202014-03-14 10:23  — 2014-03-14 13:47 60° 19' 57" S  55° 1' 54" W  View metadata report for BODC series reference number 1734420
17342112014-03-12 18:51  — 2014-03-12 19:05 62° 45' 55" S  59° 6' 34" W  View metadata report for BODC series reference number 1734211
17342232014-03-14 21:29  — 2014-03-15 01:25 59° 40' 1" S  55° 26' 43" W  View metadata report for BODC series reference number 1734223
17342352014-03-15 04:04  — 2014-03-15 07:50 59° 19' 59" S  55° 38' 52" W  View metadata report for BODC series reference number 1734235
17342472014-03-15 15:31  — 2014-03-15 19:20 58° 40' 59" S  56° 3' 20" W  View metadata report for BODC series reference number 1734247
17342592014-03-15 21:53  — 2014-03-16 02:05 58° 22' 0" S  56° 15' 0" W  View metadata report for BODC series reference number 1734259
17342602014-03-16 10:28  — 2014-03-16 14:02 57° 44' 1" S  56° 38' 26" W  View metadata report for BODC series reference number 1734260
17342722014-03-16 16:28  — 2014-03-16 19:33 57° 24' 51" S  56° 50' 24" W  View metadata report for BODC series reference number 1734272
17342842014-03-12 20:45  — 2014-03-12 22:13 62° 45' 54" S  59° 6' 34" W  View metadata report for BODC series reference number 1734284
17342962014-03-17 03:17  — 2014-03-17 06:42 56° 47' 2" S  57° 13' 47" W  View metadata report for BODC series reference number 1734296
17343032014-03-17 07:36  — 2014-03-17 09:03 56° 42' 15" S  57° 16' 44" W  View metadata report for BODC series reference number 1734303
17343152014-03-17 09:58  — 2014-03-17 16:29 56° 37' 30" S  57° 19' 39" W  View metadata report for BODC series reference number 1734315
17343272014-03-18 18:21  — 2014-03-18 19:04 55° 39' 58" S  57° 51' 17" W  View metadata report for BODC series reference number 1734327
Discrete samples 
31  CTD frame plus rosette samplerMetadata parameters
Water body released tracers
Silicate concentration parameters in the water column
Alkalinity, acidity and pH of the water column
Salinity of the water column
Total dissolved inorganic carbon (TCO2) concentration in the water column
Nitrate concentration parameters in the water column
Phosphate concentration parameters in the water column