Resources

RRS James Clark Ross JR20071230 ( JR177, JR205, JR207)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Clark Ross (74JC)
Cruise identifierJR20071230 ( JR177, JR205, JR207)
Cruise period2007-12-30 — 2008-02-16
StatusCompleted
Port of departureStanley, Falkland Islands (Malvinas)
Port of returnStanley, Falkland Islands (Malvinas)
PurposeResearch
ObjectivesCruise JR 177 was conducted within the Scotia Sea, Southern Ocean. Three transects were run as follows:
1. from Port Stanley (Falkland Islands) to the ice edge, close to South Orkneys Islands,
2. from the ice edge to the Polar Front, north of South Georgia, and
3. from South Georgia to Port Stanley. A few days were spent in the vicinity of South Georgia before undertaking transect 3

There were nine main sampling stations along transect 2. Supplementary sampling was carried out at 2 further stations, 1 on transect 1 and 1 in the vicinity of South Georgia. The time spent at each station varied between 1 and 4 days depending on scheduled activities, which was a mixture of CTD, netting, acoustic surveying and mooring deployments. At each station we took samples and measurements to characterise the oceanography, micro- and macronutrients, phytoplankton, zooplankton, krill and myctophid fish. Observations for higher predators were maintained for the majority of daytime hours throughout the cruise. Moorings were recovered and redeployed at 2 stations and contained oceanographic and acoustic instruments and a sediment trap. Whale acoustic buoys were deployed at a supplementary station in vicinity of South Georgia

The sampling was undertaken as part of the DISCOVERY 2010 BAS programme, with its remit to investigate and describe the response of the Southern Ocean ecosystem to climate variability, climate change and commercial exploitation.
Chief scientistGeraint Tarling (British Antarctic Survey)
ProjectDISCOVERY 2010
Coordinating bodyBritish Antarctic Survey
Cruise reportRRS James Clark Ross JR20071230 ( JR177,  JR205,  JR207) cruise report jr177.pdf (7.98 MB) 
Ocean/sea areas 
GeneralSouth West Atlantic Ocean (limit 20W)
SpecificSouth Atlantic
Track chartsRRS James Clark Ross JR20071230 ( JR177,  JR205,  JR207) cruise track — jr177trk.pdf (0.23 MB) 
Measurements 
Physical oceanography 
BathythermographDescription: XBT
CTD stationsDescription: CTD
Chemical oceanography 
PhosphateDescription: Underway - ships non toxic pumped sea water supply
PhosphateDescription: CTD
SilicateDescription: Underway - ships non toxic pumped sea water supply
SilicateDescription: CTD
Trace elementsDescription: Go flo bottles (clean water)
Trace elementsDescription: Underway - clean water supply from tow fish
Biology and fisheries 
Primary productivityDescription: Primary productivity bioassays
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: Underway - ships non toxic pumped sea water supply
Particulate organic matter (inc POC, PON)Description: CTD
PhytoplanktonDescription: CTD
ZooplanktonDescription: Krill feeding and egestion incubations
ZooplanktonDescription: LHPR - towed
ZooplanktonDescription: CTD
ZooplanktonDescription: Bongo net - obliquely hauled
ZooplanktonDescription: Bongo net - vertically hauled
ZooplanktonDescription: MOCNESS sampling net
ZooplanktonDescription: Krill biomass
ZooplanktonDescription: Krill behaviour incubations
ZooplanktonDescription: Underway - ships non toxic pumped sea water supply
NektonDescription: Fish biomass
NektonDescription: Krill biomass
BirdsDescription: Higher Predator observations
Mammals and reptilesDescription: Higher Predator observations
Pelagic fishDescription: Fish biomass
Moorings, landers, buoys 
Physical oceanography 
CTD stations55° 12' 0" S  41° 6' 59" W — Sediment trap mooring Recovered 25/1/2008; Redeployed 28/1/2008 at Station P2, in low productivity waters to the SW of South Georgia. 1 x Sediment trap at 2000m, 1 x ADCP at 200m 1 x CTD at 200 m
CTD stations52° 42' 59" S  48° 7' 59" W — Sediment trap mooring Recovered 31/1/08 ;Redeployed 2/2/2008 at Station P3, in productive waters to the NW of South Georgia. 1 x Sediment trap at 2000m, 1 x CTD at 500m, 1 x ADCP at 200m 1 x CTD at 200 m
Current meters52° 42' 59" S  48° 7' 59" W — Sediment trap mooring Recovered 31/1/08 ;Redeployed 2/2/2008 at Station P3, in productive waters to the NW of South Georgia. 1 x Sediment trap at 2000m, 1 x CTD at 500m, 1 x ADCP at 200m 1 x CTD at 200 m
Current meters55° 12' 0" S  41° 6' 59" W — Sediment trap mooring Recovered 25/1/2008; Redeployed 28/1/2008 at Station P2, in low productivity waters to the SW of South Georgia. 1 x Sediment trap at 2000m, 1 x ADCP at 200m 1 x CTD at 200 m
Current profiler (eg ADCP)55° 12' 0" S  41° 6' 59" W — Sediment trap mooring Recovered 25/1/2008; Redeployed 28/1/2008 at Station P2, in low productivity waters to the SW of South Georgia. 1 x Sediment trap at 2000m, 1 x ADCP at 200m 1 x CTD at 200 m
Current profiler (eg ADCP)52° 42' 59" S  48° 7' 59" W — Sediment trap mooring Recovered 31/1/08 ;Redeployed 2/2/2008 at Station P3, in productive waters to the NW of South Georgia. 1 x Sediment trap at 2000m, 1 x CTD at 500m, 1 x ADCP at 200m 1 x CTD at 200 m
Biology and fisheries 
Sediment traps55° 12' 0" S  41° 6' 59" W — Sediment trap mooring Recovered 25/1/2008; Redeployed 28/1/2008 at Station P2, in low productivity waters to the SW of South Georgia. 1 x Sediment trap at 2000m, 1 x ADCP at 200m 1 x CTD at 200 m
Sediment traps52° 42' 59" S  48° 7' 59" W — Sediment trap mooring Recovered 31/1/08 ;Redeployed 2/2/2008 at Station P3, in productive waters to the NW of South Georgia. 1 x Sediment trap at 2000m, 1 x CTD at 500m, 1 x ADCP at 200m 1 x CTD at 200 m
Mammals and reptiles53° 45' 0" S  38° 12' 0" W — Deployed 9 Feb 2008
Mammals and reptiles53° 42' 59" S  38° 9' 59" W — Deployed 9 Feb 2008
Mammals and reptiles53° 43' 59" S  38° 10' 59" W — Deployed 9 Feb 2008
Mammals and reptiles53° 46' 59" S  38° 6' 59" W — Deployed 9 Feb 2008
Mammals and reptiles53° 42' 0" S  38° 16' 59" W — Deployed 9 Feb 2008
Acoustic reflection on marine organisms.52° 42' 59" S  48° 7' 59" W — Sediment trap mooring Recovered 31/1/08 ;Redeployed 2/2/2008 at Station P3, in productive waters to the NW of South Georgia. 1 x Sediment trap at 2000m, 1 x CTD at 500m, 1 x ADCP at 200m 1 x CTD at 200 m
Acoustic reflection on marine organisms.55° 12' 0" S  41° 6' 59" W — Sediment trap mooring Recovered 25/1/2008; Redeployed 28/1/2008 at Station P2, in low productivity waters to the SW of South Georgia. 1 x Sediment trap at 2000m, 1 x ADCP at 200m 1 x CTD at 200 m
Data held at BODC Get data
Discrete samples 
62  CTD frame plus rosette samplerAmmonium and ammonia concentration parameters in water bodies
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Phosphate concentration parameters in the water column