Cruise inventory

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 — access key 'C' (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 (00 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