Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau
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 ecosyste...
Published in: | Nature Communications |
---|---|
Main Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://curis.ku.dk/portal/da/publications/antarctic-ozone-hole-modifies-iodine-geochemistry-on-the-antarctic-plateau(8d2134c7-b63e-4616-a057-74985af5fa58).html https://doi.org/10.1038/s41467-021-26109-x https://curis.ku.dk/ws/files/281985826/s41467_021_26109_x.pdf |
id |
ftcopenhagenunip:oai:pure.atira.dk:publications/8d2134c7-b63e-4616-a057-74985af5fa58 |
---|---|
record_format |
openpolar |
spelling |
ftcopenhagenunip:oai:pure.atira.dk:publications/8d2134c7-b63e-4616-a057-74985af5fa58 2024-06-09T07:40:49+00:00 Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau 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 2021-10-05 application/pdf https://curis.ku.dk/portal/da/publications/antarctic-ozone-hole-modifies-iodine-geochemistry-on-the-antarctic-plateau(8d2134c7-b63e-4616-a057-74985af5fa58).html https://doi.org/10.1038/s41467-021-26109-x https://curis.ku.dk/ws/files/281985826/s41467_021_26109_x.pdf eng eng info:eu-repo/semantics/openAccess Spolaor , A , Burgay , F , Fernandez , R P , Turetta , C , Cuevas , C A , Kim , K , Kinnison , D E , Lamarque , J-F , de Blasi , F , Barbaro , E , Corella , J P , Vallelonga , P , Frezzotti , M , Barbante , C & Saiz-Lopez , A 2021 , ' Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau ' , Nature Communications , vol. 12 , no. 1 , 5836 . https://doi.org/10.1038/s41467-021-26109-x DOME-C SEA-ICE SNOW ACCUMULATION MOLECULAR-IODINE EAST ANTARCTICA CHEMISTRY EMISSIONS BROMINE VARIABILITY TROPOSPHERE article 2021 ftcopenhagenunip https://doi.org/10.1038/s41467-021-26109-x 2024-05-16T11:29:21Z 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 (similar to 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 similar to 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. The Antarctic ozone hole has had far-reaching impacts, but effects on geochemical cycles in polar regions is still unknown. Iodine records from the interior of Antarctica provide evidence for human alteration of the natural geochemical cycle of this essential element. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Sea ice University of Copenhagen: Research Antarctic East Antarctica The Antarctic Nature Communications 12 1 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
DOME-C SEA-ICE SNOW ACCUMULATION MOLECULAR-IODINE EAST ANTARCTICA CHEMISTRY EMISSIONS BROMINE VARIABILITY TROPOSPHERE |
spellingShingle |
DOME-C SEA-ICE SNOW ACCUMULATION MOLECULAR-IODINE EAST ANTARCTICA CHEMISTRY EMISSIONS BROMINE VARIABILITY TROPOSPHERE 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 Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau |
topic_facet |
DOME-C SEA-ICE SNOW ACCUMULATION MOLECULAR-IODINE EAST ANTARCTICA CHEMISTRY EMISSIONS BROMINE VARIABILITY TROPOSPHERE |
description |
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 (similar to 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 similar to 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. The Antarctic ozone hole has had far-reaching impacts, but effects on geochemical cycles in polar regions is still unknown. Iodine records from the interior of Antarctica provide evidence for human alteration of the natural geochemical cycle of this essential element. |
format |
Article in Journal/Newspaper |
author |
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 |
author_facet |
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 |
author_sort |
Spolaor, Andrea |
title |
Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau |
title_short |
Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau |
title_full |
Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau |
title_fullStr |
Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau |
title_full_unstemmed |
Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau |
title_sort |
antarctic ozone hole modifies iodine geochemistry on the antarctic plateau |
publishDate |
2021 |
url |
https://curis.ku.dk/portal/da/publications/antarctic-ozone-hole-modifies-iodine-geochemistry-on-the-antarctic-plateau(8d2134c7-b63e-4616-a057-74985af5fa58).html https://doi.org/10.1038/s41467-021-26109-x https://curis.ku.dk/ws/files/281985826/s41467_021_26109_x.pdf |
geographic |
Antarctic East Antarctica The Antarctic |
geographic_facet |
Antarctic East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core Sea ice |
op_source |
Spolaor , A , Burgay , F , Fernandez , R P , Turetta , C , Cuevas , C A , Kim , K , Kinnison , D E , Lamarque , J-F , de Blasi , F , Barbaro , E , Corella , J P , Vallelonga , P , Frezzotti , M , Barbante , C & Saiz-Lopez , A 2021 , ' Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau ' , Nature Communications , vol. 12 , no. 1 , 5836 . https://doi.org/10.1038/s41467-021-26109-x |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-021-26109-x |
container_title |
Nature Communications |
container_volume |
12 |
container_issue |
1 |
_version_ |
1801369218606694400 |