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RRS James Clark Ross JR20021224 (JR81)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20021224 (JR81)
Cruise period2002-12-14 — 2003-01-02
StatusCompleted
Port of departureRothera, Antarctica
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesOne of eight repeat hydrography section across Drake Passage, first established during the World Ocean Circulation Experiment. Thirty CTD/LADCP stations were carried out across the 753 km section from Elephant Island to Burdwood Bank, plus one test station at the Rothera Time Series (RaTS) site, just off Biscoe Wharf at Rothera. Maximum station spacing on the section was 33 km, with stations closer together on the continental shelves. Water samples were drawn for salinity analysis, for subsequent CTD conductivity calibration. Samples were also drawn for analysis of oxygen isotope fraction delta18O, for later analysis back at Southampton Oceanography Centre. The LADCP comprised a single downward-looking RD Instruments Workhorse ADCP. The CTD was a SeaBird 911plus with dual conductivity and temperature sensors. Various underway measurements included navigation, vessel-mounted ADCP, sea surface temperature and salinity, water depth and meteorological parameters.
Cruise report dates (commencing 18/12/2002) also encompass passage leg from Stanley to Rothera.
Chief scientistSheldon Bacon (Southampton Oceanography Centre)
ProjectDrake Passage repeats, WOCE Southern Repeat Section 1b
Cruise reportRRS James Clark Ross JR20021224 (JR81) cruise report jr81.pdf (9.56 MB) 
Ocean/sea areas 
GeneralSouth Atlantic Ocean
SpecificDrake Passage
Track chartsRRS James Clark Ross JR20021224 (JR81) cruise track — jr81trk.pdf (0.10 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 15
Description: Underway oceanographic measurement of temperature, conductivity and fluorescence
CTD stationsQuantity: number of stations = 32
Description: SeaBird 911plus with dual conductivity and temperature sensors
Current profiler (eg ADCP)Quantity: number of stations = 32
Description: LADCP comprised a single downward-looking RD instruments Workhorse ADCP
Meteorology 
Routine standard measurementsQuantity: activity duration in days = 15
Description: Underway meteorological measurement of air temperature, humidity, atmospheric pressure, total incident radiation and photosynthetically available radiation
Data held at BODC Get data
Discrete samples 
32  CTD frame plus rosette sampler