Resources

RRS James Clark Ross JR20150421 (JR311, SMILES)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20150421 (JR311, SMILES)
Cruise period2015-04-21 — 2015-05-22
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesJR311 was the research cruise conducted as the observational element of the NERC Standard Grant, Surface Mixed Layer Evolution at Submesoscales (SMILES). The project aims to improve our understanding of submesoscale dynamics in regions characterised by strong fronts and where they impact on water mass transformation. For this reason, the field site was chosen to be the subantarctic front (SAF) to the east of Drake Passage where the Antarctic Circumpolar Current generates a pronounced front between the warmer subantarctic water to the north and the subpolar water to the south. To the north of the SAF, subantarctic mode water is formed through a process previously considered to be governed by air-sea interaction alone. SMILES aims to investigate the extent to which submesoscale dynamics at the SAF and the surrounding region may impact on, and potentially govern, this process of water mass transformation.
Chief scientistPhil Hosegood (University of Plymouth School of Marine Science and Engineering)
Cruise reportRRS James Clark Ross JR20150421 (JR311, SMILES) cruise report jr311.pdf (9.16 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
SpecificScotia Sea
Track chartsRRS James Clark Ross JR20150421 (JR311, SMILES) cruise track — jr311trk.pdf (0.07 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 29
Description: Underway measurements taken from JCR intake throughout the entire cruise.
CTD stationsQuantity: number of profiles = 24
Description: CTD
Subsurface temperature and salinity measurementsQuantity: number of dives = 1472
Description: Seasoar
Subsurface temperature and salinity measurementsQuantity: number of dives = 1390
Description: Moving Vessel Profiler
Current profiler (eg ADCP)Quantity: activity duration in days = 29
Description: Vessel-mounted ADCP measuremets taken throughout the entire cruise
Other physical oceanographic measurementsQuantity: number of profiles = 112
Description: Turbulence profiles
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 601
Description: Phytoplankton samples staken from underway system and CTD profiles
Moorings, landers, buoys 
Physical oceanography 
Surface drifters/drifting buoys53° 4' 59" S  54° 17' 59" W — Uninstrumented drifters, 9 in total, not recovered, deployed 1/5/2015
Surface drifters/drifting buoys54° 55' 0" S  54° 40' 0" W — Uninstrumented drifters, 10 in total, not recovered, deployed between 8/5/2015 - 17/5/2015
Other physical oceanographic measurements53° 4' 59" S  54° 17' 59" W — 9 Argo floats, deployed 1/5/2015, not recovered
Data held at BODC Get data
Series/Profiles 
24  CTD/STD cast
Reference numbers
Temperature of the water column
Salinity of the water column
Vertical spatial coordinates
Dissolved oxygen parameters in the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Reference numbers
Temperature of the water column
Salinity of the water column
Vertical spatial coordinates
Dissolved oxygen parameters in the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies

BODC idDate/TimeLocationDoc.
18103752015-05-07 04:57:03 55° 8' 30" S  54° 37' 59" W  View metadata report for BODC series reference number 1810375
18103992015-05-07 11:31:22 54° 53' 55" S  54° 47' 29" W  View metadata report for BODC series reference number 1810399
18104062015-05-07 14:13:57 54° 51' 23" S  54° 49' 2" W  View metadata report for BODC series reference number 1810406
18104182015-05-07 16:49:03 54° 43' 18" S  54° 53' 51" W  View metadata report for BODC series reference number 1810418
18104312015-05-07 23:07:30 54° 56' 17" S  54° 46' 12" W  View metadata report for BODC series reference number 1810431
18104552015-05-13 02:52:57 56° 40' 4" S  53° 38' 43" W  View metadata report for BODC series reference number 1810455
18104792015-05-13 14:27:13 55° 40' 2" S  54° 8' 3" W  View metadata report for BODC series reference number 1810479
18104922015-05-13 22:51:59 55° 17' 13" S  54° 16' 54" W  View metadata report for BODC series reference number 1810492
18103512015-05-02 02:23:58 53° 3' 42" S  54° 17' 19" W  View metadata report for BODC series reference number 1810351
18103632015-05-07 01:17:39 55° 1' 14" S  54° 43' 12" W  View metadata report for BODC series reference number 1810363
18105592015-05-14 18:55:24 54° 40' 16" S  54° 32' 41" W  View metadata report for BODC series reference number 1810559
18105722015-05-15 03:53:09 54° 12' 43" S  54° 45' 29" W  View metadata report for BODC series reference number 1810572
18105842015-05-15 06:52:24 54° 3' 13" S  54° 50' 34" W  View metadata report for BODC series reference number 1810584
18103262015-05-01 19:04:56 53° 5' 18" S  54° 18' 26" W  View metadata report for BODC series reference number 1810326
18103872015-05-07 08:42:43 54° 56' 23" S  54° 45' 49" W  View metadata report for BODC series reference number 1810387
18105232015-05-14 06:08:11 55° 3' 58" S  54° 22' 7" W  View metadata report for BODC series reference number 1810523
18105472015-05-14 13:42:35 54° 46' 6" S  54° 29' 35" W  View metadata report for BODC series reference number 1810547
18103382015-05-01 22:31:44 53° 4' 30" S  54° 18' 1" W  View metadata report for BODC series reference number 1810338
18104432015-05-12 23:24:31 56° 46' 42" S  53° 25' 29" W  View metadata report for BODC series reference number 1810443
18105112015-05-14 02:45:15 55° 9' 48" S  54° 19' 54" W  View metadata report for BODC series reference number 1810511
18105602015-05-14 22:57:08 54° 28' 8" S  54° 38' 3" W  View metadata report for BODC series reference number 1810560
18104672015-05-13 09:02:28 56° 6' 2" S  53° 55' 22" W  View metadata report for BODC series reference number 1810467
18104802015-05-13 19:33:25 55° 25' 58" S  54° 12' 43" W  View metadata report for BODC series reference number 1810480
18105352015-05-14 09:38:44 54° 56' 56" S  54° 25' 34" W  View metadata report for BODC series reference number 1810535
12  Thermistor chain
Reference numbers
Horizontal spatial co-ordinates
Date and time
Temperature of the water column
Reference numbers
Horizontal spatial co-ordinates
Date and time
Temperature of the water column

BODC idDate/TimeLocationDoc.
20149062015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014906
20149552015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014955
20148632015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014863
20149312015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014931
20149792015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014979
20149672015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014967
20148512015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014851
20148872015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014887
20149182015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014918
20148752015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014875
20148992015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014899
20149432015-04-26 14:09:30  — 2015-04-30 19:49:30 53° 8' 43" S  54° 33' 35" W — 52° 34' 9" S  55° 25' 2" W  View metadata report for BODC series reference number 2014943
Discrete samples 
24  CTD frame plus rosette sampler
4  Drifting Buoy