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RRS James Clark Ross JR17003

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR17003
Cruise period2018-01-26 — 2018-02-18
StatusCompleted
Port of departureRothera, Antarctica
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesAfter departing Rothera, four gliders were recovered from the shelf break region west of the Antarctic Peninsula in Drake Passage. The vessel then proceeded to Signy Island, South Orkney Islands, to drop off two passengers. A repeat of part of the WOCE A23 CTD section from 64°S to South Georgia was performed for the 12th time. The vessel then proceeded to the shelf break south of King Haakon Bay, South Georgia, where further CTD casts were performed, including a transect into the bay itself. Two gliders were recovered from the northwest of South Georgia, near the "P3" mooring site. The vessel then proceeded to King Edward Point to uplift two personnel, and then transited to Stanley, Falkland Islands, where the cruise was demobilised.

This cruise formed part of the ORCHESTRA project (PI: Emily Shuckburgh, British Antarctic Survey); the two last gliders were deployed as part of the GOCART project (PI: Stephanie Henson, National Oceanography Centre, Southampton).
Chief scientistPovl Abrahamsen (British Antarctic Survey)
ProjectOcean Regulation of Climate by Heat and Carbon Sequestration and Transports (ORCHESTRA)
Coordinating bodyBritish Antarctic Survey (BAS)
Cruise reportRRS James Clark Ross JR17003 cruise report jr17003.pdf (5.85 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
Southern Ocean
SpecificDrake Passage, King Haakon Bay. Bellingshausen Sea, Weddell Sea, Scotia Sea
Track chartsRRS James Clark Ross JR17003 cruise track — jr17003trk.pdf (0.50 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 24
Description: Routine underway measurements of temperature, salinity, transparency, and chlorophyll fluorescence
CTD stationsQuantity: number of stations = 60
Description: CTD casts, using Sea-Bird Electronics 9+ with dual temperature/conductivity sensors, dissolved oxygen, transmissometer, fluorometer, PAR sensor. Downward- and upward-looking 300-kHz lowered ADCPs were used on all 60 stations. Two casts were performed on station 5, giving 61 casts in total.
Transparency (eg transmissometer)Quantity: number of stations = 60
Description: CTD casts, using Sea-Bird Electronics 9+ with dual temperature/conductivity sensors, dissolved oxygen, transmissometer, fluorometer, PAR sensor. Downward- and upward-looking 300-kHz lowered ADCPs were used on all 60 stations. Two casts were performed on station 5, giving 61 casts in total.
Transparency (eg transmissometer)Quantity: activity duration in days = 24
Description: Routine underway measurements of temperature, salinity, transparency, and chlorophyll fluorescence
Optics (eg underwater light levels)Quantity: number of stations = 60
Description: CTD casts, using Sea-Bird Electronics 9+ with dual temperature/conductivity sensors, dissolved oxygen, transmissometer, fluorometer, PAR sensor. Downward- and upward-looking 300-kHz lowered ADCPs were used on all 60 stations. Two casts were performed on station 5, giving 61 casts in total.
Current profiler (eg ADCP)Quantity: number of stations = 60
Description: CTD casts, using Sea-Bird Electronics 9+ with dual temperature/conductivity sensors, dissolved oxygen, transmissometer, fluorometer, PAR sensor. Downward- and upward-looking 300-kHz lowered ADCPs were used on all 60 stations. Two casts were performed on station 5, giving 61 casts in total.
Current profiler (eg ADCP)Quantity: activity duration in days = 24
Description: Current profiles from vessel-mounted ADCP
Chemical oceanography 
OxygenQuantity: number of stations = 60
Description: CTD casts, using Sea-Bird Electronics 9+ with dual temperature/conductivity sensors, dissolved oxygen, transmissometer, fluorometer, PAR sensor. Downward- and upward-looking 300-kHz lowered ADCPs were used on all 60 stations. Two casts were performed on station 5, giving 61 casts in total.
IsotopesQuantity: number of stations = 21
Description: Samples collected for stable oxygen isotope (O-18) analysis from 20 stations on the A23 section and one station in King Haakon Bay. 245 samples collected in total.
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 3
Description: Filtration for POC and Chl from CTD casts near three glider recovery sites.
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: activity duration in days = 24
Description: Routine underway measurements of temperature, salinity, transparency, and chlorophyll fluorescence
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 60
Description: CTD casts, using Sea-Bird Electronics 9+ with dual temperature/conductivity sensors, dissolved oxygen, transmissometer, fluorometer, PAR sensor. Downward- and upward-looking 300-kHz lowered ADCPs were used on all 60 stations. Two casts were performed on station 5, giving 61 casts in total.
Particulate organic matter (inc POC, PON)Quantity: number of stations = 3
Description: Filtration for POC and Chl from CTD casts near three glider recovery sites.
Meteorology 
Incident radiationQuantity: activity duration in days = 24
Description: Routine meteorological measurements of temperature, wind, and solar radiation
Routine standard measurementsQuantity: activity duration in days = 24
Description: Routine meteorological measurements of temperature, wind, and solar radiation
Geology and geophysics 
Single-beam echosoundingQuantity: activity duration in days = 24
Description: Single-beam echo sounding, using 12-kHz Kongsberg EA600 echo sounder (running in passive mode using ping from EM122 multi-beam echo sounder for most of the cruise)
Multi-beam echosoundingQuantity: activity duration in days = 17
Description: Multi-beam echo sounding, using 12-kHz Kongsberg EM122 echo sounder. Although the echo sounder was running almost continuously for 23 days, data were only recorded for 17 days, as we already hold data from much of the study area.
Moorings, landers, buoys 
Physical oceanography 
Subsurface temperature and salinity measurements60° 34' 59" S  63° 25' 0" W — Slocum glider 632 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Subsurface temperature and salinity measurements60° 53' 59" S  64° 7' 0" W — Slocum glider 330 recovered; was deployed 01/12/2017 on cruise JR17001; recovered 28/01/2018
Subsurface temperature and salinity measurements52° 47' 59" S  40° 8' 59" W — Slocum glider 404 "Pancake" recovered; was deployed 15/11/2017 on cruise DY086; recovered 13/02/2018
Subsurface temperature and salinity measurements52° 46' 0" S  40° 7' 0" W — Slocum glider 398 "Churchill" recovered; was deployed 29/11/2017 on cruise DY086; recovered 13/02/2018
Subsurface temperature and salinity measurements61° 19' 0" S  63° 25' 59" W — Seaglider 640 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Subsurface temperature and salinity measurements61° 1' 59" S  64° 20' 59" W — Slocum glider 633 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Optics (eg underwater light levels)52° 47' 59" S  40° 8' 59" W — Slocum glider 404 "Pancake" recovered; was deployed 15/11/2017 on cruise DY086; recovered 13/02/2018
Other physical oceanographic measurements61° 19' 0" S  63° 25' 59" W — Seaglider 640 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Other physical oceanographic measurements61° 1' 59" S  64° 20' 59" W — Slocum glider 633 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Other physical oceanographic measurements52° 46' 0" S  40° 7' 0" W — Slocum glider 398 "Churchill" recovered; was deployed 29/11/2017 on cruise DY086; recovered 13/02/2018
Other physical oceanographic measurements60° 53' 59" S  64° 7' 0" W — Slocum glider 330 recovered; was deployed 01/12/2017 on cruise JR17001; recovered 28/01/2018
Other physical oceanographic measurements52° 47' 59" S  40° 8' 59" W — Slocum glider 404 "Pancake" recovered; was deployed 15/11/2017 on cruise DY086; recovered 13/02/2018
Other physical oceanographic measurements60° 34' 59" S  63° 25' 0" W — Slocum glider 632 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Chemical oceanography 
Oxygen60° 53' 59" S  64° 7' 0" W — Slocum glider 330 recovered; was deployed 01/12/2017 on cruise JR17001; recovered 28/01/2018
Oxygen52° 46' 0" S  40° 7' 0" W — Slocum glider 398 "Churchill" recovered; was deployed 29/11/2017 on cruise DY086; recovered 13/02/2018
Oxygen52° 47' 59" S  40° 8' 59" W — Slocum glider 404 "Pancake" recovered; was deployed 15/11/2017 on cruise DY086; recovered 13/02/2018
Oxygen61° 19' 0" S  63° 25' 59" W — Seaglider 640 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)60° 53' 59" S  64° 7' 0" W — Slocum glider 330 recovered; was deployed 01/12/2017 on cruise JR17001; recovered 28/01/2018
Phytoplankton pigs (eg chlorophyll, fluorescence)60° 34' 59" S  63° 25' 0" W — Slocum glider 632 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Phytoplankton pigs (eg chlorophyll, fluorescence)61° 1' 59" S  64° 20' 59" W — Slocum glider 633 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Phytoplankton pigs (eg chlorophyll, fluorescence)52° 46' 0" S  40° 7' 0" W — Slocum glider 398 "Churchill" recovered; was deployed 29/11/2017 on cruise DY086; recovered 13/02/2018
Phytoplankton pigs (eg chlorophyll, fluorescence)61° 19' 0" S  63° 25' 59" W — Seaglider 640 recovered; was deployed 30/11/2017 on cruise JR17001; recovered 28/01/2018
Phytoplankton pigs (eg chlorophyll, fluorescence)52° 47' 59" S  40° 8' 59" W — Slocum glider 404 "Pancake" recovered; was deployed 15/11/2017 on cruise DY086; recovered 13/02/2018
Data held at BODC Get data
Discrete samples 
61  CTD frame plus rosette sampler