EARTH SCIENCE > Oceans > Ocean Chemistry > Silicate

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  • Lowered Acoustic Doppler Current Profiler (LADCP) and Conductivity Temperature Depth (CTD) data collected aboard the RRS James Clark Ross during cruises JR80 and JR110 in 2004. Data were used to calibrate instruments on four ocean moorings deployed in Shags Rock Passage, Scotia Sea. Four CTDs were used during JR110. Data includes continuous ocean profile data (surface to sea floor); temperature, salinity, pressure, current.

  • Argo floats measure temperature and salinity. Seven floats were deployed in November 2004 from the RRS James Clark Ross cruise JR110. Data were transmitted automatically to the British Oceanographic Data Centre (BODC).

  • Discrete ocean temperature, salinity and current measurements at four locations in Shag Rocks Passage. Moorings were deployed at 4 locations in Shag Rocks Passage (5255.6700S, 4745.5500W), (5255.6530S, 4745.9920W), (5302.5100S, 4802.7700W), (5302.5100S, 4802.3130W), (5309.0180S, 4829.9480W), (5318.2510S, 4854.8280W) from cruise JR080 in May 2004 and recovered on cruise JR110 in November 2004.

  • Two moorings were deployed and recovered using the James Clark Ross (cruise numbers: JR112/113, JR155). One was deployed in Ryder Bay at the Rothera Oceanographic and Biological Time Series (RaTS) oceanographic station midway between Rothera Point and Leonie Islands. The other was deployed in deep water in northern Marguerite Bay. The moorings were used to monitor particle flux, currents, salinity and temperature. Two sediment traps on each mooring were used to measure biogenic flux from surface waters to the seafloor and quantify changes down the water column.

  • Water samples were collected from Ryder Bay at the Rothera Time-Series (RaTS) site, using a small boat. A biogeochemical profile was performed at the following 5 depths: 0m (surface), 5m, 10m, 15m and 25m, for four RaTS events on: 7 January, 13 January, 19 January and 1 February 2005. Samples were taken for: phytoplankton nitrate, ammonium and urea uptake measurements, using stable isotope incubations and also primary production PvE curves were produced using 14C radioisotope incubations; Dissolved macronutrients (nitrate, silicate, phosphate, and urea); Surface dissolved iron. A scaled-down sampling RaTS event was performed by the Rothera Marine Assistants involving sampling for all above measurements once every 3 weeks at the 5m depth only at the RaTS site.