|Titolo||200-year ice core bromine reconstruction at Dome C (Antarctica): observational and modelling results|
|Tipo di pubblicazione||Articolo su Rivista peer-reviewed|
|Anno di Pubblicazione||2023|
|Autori||Burgay, F., Fernández R.P., Segato D., Turetta C., Blaszczak-Boxe C.S., Rhodes R.H., Scarchilli Claudio, Ciardini Virginia, Barbante C., Saiz-Lopez A., and Spolaor A.|
|Parole chiave||antarctica, bromine, Dome Concordia, East Antarctica, Ice core, ozone depletion, reconstruction, Sea ice, Ultraviolet radiation|
Bromine enrichment (Brenr) has been proposed as an ice core proxy for past sea-ice reconstruction. Understanding the processes that influence bromine preservation in the ice is crucial to achieve a reliable interpretation of ice core signals and to potentially relate them to past sea-ice variability. Here, we present a 210 years bromine record that sheds light on the main processes controlling bromine preservation in the snow and ice at Dome C, East Antarctic plateau. Using observations alongside a modelling approach, we demonstrate that the bromine signal is preserved at Dome C and it is not affected by the strong variations in ultraviolet radiation reaching the Antarctic plateau due to the stratospheric ozone hole. Based on this, we investigate whether the Dome C Brenr record can be used as an effective tracer of past Antarctic sea ice. Due to the limited time window covered by satellite measurements and the low sea-ice variability observed during the last 30 years in East Antarctica, we cannot fully validate Brenr as an effective proxy for past sea-ice reconstructions at Dome C. © 2023 François Burgay et al.
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