Halogen deposition in polar snow and ice
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| Autori principali: | , , , , , , , , , , , , , , , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2014
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| _version_ | 1867170467520970752 |
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| author | 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 |
| author_facet | 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 |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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 snow and Antarctic ice occur in spring and summer, when sunlight is present. Iodine concentrations are largest in winter Antarctic ice strata, contrary to contemporary observations of summer maxima in iodine emissions. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_833942 |
| institution | PANGAEA |
| language | en |
| publishDate | 2014 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Halogen deposition in polar snow and ice 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 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 snow and Antarctic ice occur in spring and summer, when sunlight is present. Iodine concentrations are largest in winter Antarctic ice strata, contrary to contemporary observations of summer maxima in iodine emissions. |
| title | Halogen deposition in polar snow and ice |
| topic | |
| url | https://doi.org/10.1594/PANGAEA.833942 |