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Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau

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Title
Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau
Other Titles
남극 오존홀에 의한 남극고원의 요오드 지구화학거동 변동연구
Authors
Spolaor, Andrea
Burgay, Francois
Fernandez, Rafael P.
Turetta, Clara
Cuevas, Carlos A.
Kim, Kitae
Kinnison, Douglas E.
Lamarque, Jean-Francois
de Blasi, Fabrizio
Barbaro, Elena
Corella, Juan Pablo
Vallelonga, Paul
Frezzotti, Massimo
Barbante, Carlo
Saiz-Lopez, Alfonso
Subject
Science & Technology - Other Topics
Keywords
DOME-CSEA-ICESNOW ACCUMULATIONMOLECULAR-IODINEEAST ANTARCTICACHEMISTRYEMISSIONSBROMINEVARIABILITYTROPOSPHERE
Issue Date
2021-10-05
Citation
Spolaor, Andrea, et al. 2021. "Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau". NATURE COMMUNICATIONS, 12(1): 1-9.
Abstract
Polar stratospheric ozone has decreased since the 1970s due to anthropogenic emissions of chlorofluorocarbons and halons, resulting in the formation of an ozone hole over Antarctica. The effects of the ozone hole and the associated increase in incoming UV radiation on terrestrial and marine ecosystems are well established; however, the impact on geochemical cycles of ice photoactive elements, such as iodine, remains mostly unexplored. Here, we present the first iodine record from the inner Antarctic Plateau (Dome C) that covers approximately the last 212 years (1800-2012 CE). Our results show that the iodine concentration in ice remained constant during the pre-ozone hole period (1800-1974 CE) but has declined twofold since the onset of the ozone hole era (~1975 CE), closely tracking the total ozone evolution over Antarctica. Based on ice core observations, laboratory measurements and chemistry-climate model simulations, we propose that the iodine decrease since ~1975 is caused by enhanced iodine re-emission from snowpack due to the ozone hole-driven increase in UV radiation reaching the Antarctic Plateau. These findings suggest the potential for ice core iodine records from the inner Antarctic Plateau to be as an archive for past stratospheric ozone trends.
URI
https://repository.kopri.re.kr/handle/201206/13620
DOI
http://dx.doi.org/10.1038/s41467-021-26109-x
Type
Article
Station
기타()
Indexed
SCIE
Appears in Collections  
2020-2020, Investigation of ice microstructure properties for developing low-temperature purification and environment/energy materials (20-20) / Kim, Kitae (PE20030)
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