The main aim is to enhance our understanding of the interlinked biogeochemical cycles of iron and carbon in the Southern Ocean to better understand how intra-seasonal, seasonal and interannual variability in iron supply and recycling influences the productivity and export of carbon into the ocean's interior in the subantarctic circumpolar ring.
Additional aims include:
- Elucidation of the relative roles of iron supply versus biological and photochemical recycling in driving subantarctic primary productivity and export fluxes.
- Resolution of the interplay of multiple environmental controls - irradiance, mixed layer depth, trace element supply (zinc, copper, etc.), silicate supply, iron availability - across a range of temporal and spatial scales - to better predict changes in rates of primary productivity.
- Enhancement of knowledge on the interplay of mesoscale and sub mesoscale physics and biogeochemistry in the vicinity of the SOTS site to better understand the degree of coupling and integration of surface ocean processes with those in the subsurface ocean (such as the sensors and particle traps on the SOTS mooring).
Philip Boyd (Institute for Marine and Antarctic Studies), Thomas Trull (University of Tasmania, Australia)
GEOTRACES -Trace elements and their isotopes in the water column