| Summary: | Progress Code: completed Statement: Station 2 : Core 5 originally sampled for Trace Metal (tripled bagged) has been used for the Ice texture by mistake. The Core 4 is the only one cleaned (inner bag rinsed with milli-Q water). Station 3 : Difficult station due to cold temperatures and thickness of the ice. Two cores froze immediately in the corer, need to come back to the ship to remove them. The POC/PON core is taken at a first site, all the other ones are taken a bit further (but very close) after dinner. No brines collected for this station due to the low temperature. After 30 minutes, no brine infiltration. Station 4 : No major issues (except a crack in the morning leading to stopping the station for 2 hours). Station 6 : Difficult station due to the ice thickness. Use of the extension on the corer. Cores of ~140-150 cm. No brines nor underlying seawater collected (not enough time for it). Station 7 : No issues. Station 8 : No issues. Cores of 90 cm, after that slush and probably some ice under, not possible to catch it. Antarctic sea ice is known to store key micronutrients, such as iron, as well as a suite of less studied trace metals in winter which are rapidly released in spring. This stimulates ice edge phytoplankton blooms which drive the biological removal of climatically-important gases like carbon dioxide. By linking the distribution of iron and other trace elements to the cycles of carbon, nitrogen and silicon in the sea ice zone in spring, this project will identify their biogeochemical roles in the seasonal ice zone and how this may change with predicted climate-driven perturbations. All sampling bottles and equipment were decontaminated using trace metal clean techniques. Care was taken at each site to select level ice with homogeneous snow thickness. At all the stations, the same sampling procedure has been used : Firstly, snow was collected using acid cleaned low density polyethylene (LDPE) shovels and transferred into acid-cleaned 3.8 l LDPE containers (Nalgene). Snow collected is ...
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