TY - JOUR
T1 - 200-year ice core bromine reconstruction at Dome C (Antarctica)
T2 - observational and modelling results
AU - Burgay, François
AU - Fernández, Rafael Pedro
AU - Segato, Delia
AU - Turetta, Clara
AU - Blaszczak-Boxe, Christopher S.
AU - Rhodes, Rachael H.
AU - Scarchilli, Claudio
AU - Ciardini, Virginia
AU - Barbante, Carlo
AU - Saiz-Lopez, Alfonso
AU - Spolaor, Andrea
N1 - Publisher Copyright:
© 2023 François Burgay et al.
PY - 2023/1/27
Y1 - 2023/1/27
N2 - 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.
AB - 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.
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U2 - 10.5194/tc-17-391-2023
DO - 10.5194/tc-17-391-2023
M3 - Article
AN - SCOPUS:85147306920
SN - 1994-0416
VL - 17
SP - 391
EP - 405
JO - Cryosphere
JF - Cryosphere
IS - 1
ER -