Cruise inventory

RRS James Cook JC134

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Cook (740H)
Cruise identifierJC134
Cruise period2016-03-19 — 2016-04-16
StatusCompleted
Port of departureSt. John's, Antigua and Barbuda
Port of returnSanta Cruz de Tenerife, Spain
PurposeResearch
ObjectivesDUSTTRAFFIC is a project in which we monitor and sample Saharan dust that is being blown from NW African sources across the Atlantic Ocean. In particular, we want to study the marine environmental effect of deposition of mineral dust on the ocean surface.

To this end, a Transatlantic array of moorings (N=5) was deployed along the 12th parallel between 23°W (just South of the Cape Verde Islands) and 57°W (just East of Barbados) for the first time in 2012. These stations were visited during consecutive cruises in 2013 and 2015.

Each of the moorings comprises two sediment traps at 1200 and 3500m water depth. These sediment traps sample settling particles (both dust and marine biological remains) that are sinking towards the sea floor. In addition, two moored surface buoys were added in 2014 at the stations at 38°W and 49°W. With these buoys, Saharan dust is sampled from the atmosphere.

During the present cruise, DUSTTRAFFIC IV, five sediment-trap moorings and two dust-collecting buoys will be recovered and two moorings and two buoys will be redeployed at two positions along the 12th parallel, this time between 23°W and 38°W (East of the Mid Atlantic Ridge).

In addition, a third dust-collecting buoy, which is located at 21°N/21°W (off Cape Blanc, Mauritania) will be recovered, serviced, and re-deployed.
Chief scientistJan-Berend W Stuut (Royal Netherlands Institute for Sea Research)
Ocean/sea areas 
GeneralNorth Atlantic Ocean
SpecificEquatorial North Atlantic
Track chartsRRS James Cook JC134 cruise track — jc134trk.pdf (00 MB) 
Measurements 
Physical oceanography 
CTD stationsQuantity: number of stations = 24
Description: Water sampling with CTD-rosette for micropaleontology and microbiology. 30 casts at 14 stations en route between Antigua and Tenerife. Four deep casts to 4000m at stations M5 (S1), M4 (S4), M3 (S7) and M1 (S13). 26 shallow casts to 300m at all stations (N=14), replicates at 12 stations.
Biology and fisheries 
ZooplanktonQuantity: number of hauls = 28
Description: At each station, two dips with a plankton net (>150 micrometres) to 200m
Other biological/fisheries measurementQuantity: number of hauls = 7
Description: Plastics net at the ocean's surface, deployed at S1-S4, S7, S13, S14 (N=7)
Meteorology 
Other meteorological measurementsQuantity: number of samples = 26
Description: Air sampling during 24hrs using HiVol samplers
Moorings, landers, buoys 
Biology and fisheries 
Sediment traps12° 0' 0" N  56° 0' 0" W — 15M5 Sediment trap sampling, long time series, recovered
Sediment traps12° 0' 0" N  23° 0' 0" W — 14M1 Sediment trap sampling, long time series, recovered
Sediment traps12° 0' 0" N  23° 0' 0" W — 16M1 Sediment trap sampling, long time series, re-deployed
Sediment traps12° 0' 0" N  38° 0' 0" W — 16M3 Sediment trap sampling, long time series, re-deployed
Sediment traps12° 0' 0" N  38° 0' 0" W — 15M3 Sediment trap sampling, long time series, recovered
Sediment traps12° 0' 0" N  49° 0' 0" W — 15M4 Sediment trap sampling, long time series, recovered
Sediment traps12° 0' 0" N  23° 0' 0" W — 15M1 Sediment trap sampling, long time series, recovered
Meteorology 
Other meteorological measurements12° 0' 0" N  38° 0' 0" W — 16Michelle air sampling with buoy, long time series, re-deployed
Other meteorological measurements12° 0' 0" N  23° 0' 0" W — 16Laura air sampling with buoy, long time series, deployed
Other meteorological measurements12° 0' 0" N  49° 0' 0" W — 15Laura air sampling with buoy, long time series, recovered
Other meteorological measurements21° 0' 0" N  21° 0' 0" W — 15Carmen air sampling with buoy, long time series, recovered
Other meteorological measurements12° 0' 0" N  38° 0' 0" W — 15Michelle air sampling with buoy, long time series, recovered
Other meteorological measurements21° 0' 0" N  21° 0' 0" W — 16Carmen air sampling with buoy, long time series, re-deployed
Geology and geophysics 
Other geological/geophysical measurements12° 0' 0" N  38° 0' 0" W — M3 drifting sediment traps 24hrs at 45m, 75m, 175m
Other geological/geophysical measurements21° 0' 0" N  21° 0' 0" W — CB drifting sediment traps 24hrs at 100m, 200m, 400m
Other geological/geophysical measurements12° 0' 0" N  23° 0' 0" W — M1 drifting sediment traps 24hrs at 100m, 200m, 400m
Other geological/geophysical measurements12° 0' 0" N  49° 0' 0" W — M4 drifting sediment traps 24hrs at 100m, 200m, 400m
Other geological/geophysical measurements12° 0' 0" N  56° 0' 0" W — M5 drifting sediment traps 24hrs at 100m, 200m, 400m