Halogen deposition in polar snow and ice ...

The atmospheric chemistry of iodine and bromine in polar regions is of interest due to the key role of halogens in many atmospheric processes, particularly tropospheric ozone destruction. Bromine is emitted from the open ocean but is enriched above first-year sea ice during springtime bromine explos...

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Bibliographic Details
Main Authors: Spolaor, Andrea, Vallelonga, Paul T, Gabrieli, Jacopo, Martma, Tõnu, Björkman, Mats P, Isaksson, Elisabeth, Cozzi, Giulio, Turetta, Clara, Kjær, Helle Astrid, Curran, Mark A J, Moy, Andrew D, Schönhardt, Anja, Blechschmidt, Anne-Marlene, Burrows, John Philipp, Plane, J M C, Barbante, Carlo
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2014
Subjects:
Antarctic
Arctic
Burrows
Helle
Antarc*
Antarctica
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.833942
https://doi.pangaea.de/10.1594/PANGAEA.833942
Description
Summary:The atmospheric chemistry of iodine and bromine in polar regions is of interest due to the key role of halogens in many atmospheric processes, particularly tropospheric ozone destruction. Bromine is emitted from the open ocean but is enriched above first-year sea ice during springtime bromine explosion events, whereas iodine is emitted from biological communities hosted by sea ice. It has been previously demonstrated that bromine and iodine are present in Antarctic ice over glacial-interglacial cycles. Here we investigate seasonal variability of bromine and iodine in polar snow and ice, to evaluate their emission, transport and deposition in Antarctica and the Arctic and better understand potential links to sea ice. We find that bromine enrichment (relative to sea salt content) and iodine concentrations in polar ice do vary seasonally in Arctic snow and Antarctic ice and we relate such variability to satellite-based observations of tropospheric halogen concentrations. Peaks of bromine enrichment in Arctic ... : Supplement to: Spolaor, Andrea; Vallelonga, Paul T; Gabrieli, Jacopo; Martma, Tõnu; Björkman, Mats P; Isaksson, Elisabeth; Cozzi, Giulio; Turetta, Clara; Kjær, Helle Astrid; Curran, Mark A J; Moy, Andrew D; Schönhardt, Anja; Blechschmidt, Anne-Marlene; Burrows, John Philipp; Plane, J M C; Barbante, Carlo (2014): Seasonality of halogen deposition in polar snow and ice. Atmospheric Chemistry and Physics, 14(6), 9613-9622 ...

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