Projects per year
Dissolved Ba (D-Ba) in oceanic waters behaves as a bio-intermediate element and presents strong similarities to nutrients and alkalinity distributions. However, the biogeochemical cycling of Ba is unique and strongly linked with the particulate biogenic Ba (P-Ba; mainly formed as barite crystals, BaSO4) dynamics. In surface waters, P-Ba forms during particulate organic matter degradation by prokaryotes activity, and D-Ba subtraction in ambient water during this process is responsible for subsurface water D-Ba depletion. In sediments, P-Ba is used as an indicator of surface (paleo)-export production. To go further in understanding the interaction between the dissolved and particulate Ba phases and controls on their dynamics, P-Ba and D-Ba were measured in Antarctic sea ice (SIPEX-II cruise, 2012) where previous studies interestingly reported barite accumulation. Results will be confronted to sea-ice biogeochemical properties and discussed in the context of the importance of the Antarctic sea-ice zone as a driver and indicator of global climate processes.
|Title of host publication||International Symposium on Sea Ice in a Changing Environment, 10-14/03/2014, Hobart Australia|
|Publication status||Published - 2014|
|Event||International Symposium on Sea Ice in a Changing Environment, 10-14/03/2014, Hobart Australia - Hobart, United Kingdom|
Duration: 10 Mar 2014 → 14 Mar 2014
|Conference||International Symposium on Sea Ice in a Changing Environment, 10-14/03/2014, Hobart Australia|
|Period||10/03/14 → 14/03/14|