Cruise inventory

RRS James Clark Ross JR15003

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR15003
Cruise period2015-12-17 — 2016-01-13
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesJR15003 is a combined logistic and science cruise, including base/field camp operations at South Powell Island, Signy, and Coronation Island in the South Orkneys and at Rothera Research Station. The science comprised three primary projects (SMEs 804, 809, and 904) and two opportunistic add-on projects. During the southbound leg of the cruise we deployed two Slocum gliders off the western Antarctic Peninsula (one had to be recovered following a leak and the other is to be recovered from Rothera later in the season) and conducted CTD profiles and sediment cores at three sites on the western Antarctic Peninsula continental shelf. On the northbound leg in Drake Passage we conducted CTD profiles at 28 sites; recovered and redeployed bottom landers equipped with bottom pressure recorders and temperature and salinity sensors at one site on the southern continental slope and one on the northern slope; and deployed 4 biogeochem-equipped autonomous profiling floats. Water samples from the CTD casts were analysed for salinity (all stations) and oxygen (some stations), and samples were taken at some stations for subsequent onshore analysis of nutrients, neodymium, pH/alkalinity, and HPLC/POC. Throughout the cruise as ice and weather conditions permitted we made continuous underway measurements of meteorological variables, surface temperature and salinity, upper ocean currents, and bathymetry, along with intermittent sampling of surface water for salinity calibration (at sea) and neodymium (ashore). The cruise itinerary also allowed for servicing of the tide gauges at Stanley, Signy, Rothera, and Vernadsky.
Chief scientistYvonne L Firing (National Oceanography Centre, Southampton)
Cruise reportRRS James Clark Ross JR15003 cruise report jr15003.pdf — access key 'C' (0.29 MB)  RRS James Clark Ross JR15003 cruise report jr15003nocs.pdf (4.81 MB) 
Ocean/sea areas 
GeneralSouthern Ocean
SpecificWestern Antarctic Peninsula (Bransfield Strait; continental shelf between Anvers Island and Adelaide Island). Drake Passage/Scotia Sea (between Elephant Island and Burdwood Bank).
Track chartsRRS James Clark Ross JR15003 cruise track — jr15003trk.pdf (00 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 14
Description: Routine underway measurements
Water bottle stationsQuantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
Water bottle stationsQuantity: number of stations = 3
Description: CTD water bottle and sediment core chemistry measurements
Water bottle stationsQuantity: number of stations = 31
Description: CTD casts physical measurements
CTD stationsQuantity: number of stations = 31
Description: CTD casts physical measurements
Transparency (eg transmissometer)Quantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
Optics (eg underwater light levels)Quantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
Current profiler (eg ADCP)Quantity: number of stations = 31
Description: CTD casts physical measurements
Current profiler (eg ADCP)Quantity: activity duration in days = 14
Description: Routine underway measurements
Neutrally buoyant floatsQuantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
Chemical oceanography 
OxygenQuantity: number of stations = 3
Description: CTD water bottle and sediment core chemistry measurements
OxygenQuantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
Carbon dioxideQuantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
NitrateQuantity: number of stations = 3
Description: CTD water bottle and sediment core chemistry measurements
NitrateQuantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
SilicateQuantity: number of stations = 3
Description: CTD water bottle and sediment core chemistry measurements
AlkalinityQuantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
pHQuantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
Trace elementsQuantity: number of stations = 3
Description: CTD water bottle and sediment core chemistry measurements
IsotopesQuantity: number of stations = 3
Description: CTD water bottle and sediment core chemistry measurements
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
Particulate organic matter (inc POC, PON)Quantity: number of stations = 4
Description: Floats and float calibration CTD/water bottle measurements
Meteorology 
Routine standard measurementsQuantity: activity duration in days = 14
Description: Routine underway measurements
Geology and geophysics 
Core - soft bottomQuantity: number of stations = 3
Description: CTD water bottle and sediment core chemistry measurements
Single-beam echosoundingQuantity: activity duration in days = 14
Description: Routine underway measurements
Multi-beam echosoundingQuantity: activity duration in days = 14
Description: Routine underway measurements
Moorings, landers, buoys 
Physical oceanography 
Sea level (inc. bot. press., inverted echosounder)60° 51' 8" S  54° 43' 45" W — Bottom pressure, temperature, and conductivity; recovered and replacement deployed 6 Jan 2016
Sea level (inc. bot. press., inverted echosounder)54° 58' 48" S  57° 59' 18" W — Bottom pressure, temperature, and conductivity; recovered and replacement deployed 11 Jan 2016