Bromine, iodine and sodium along the EAIIST traverse: Bulk and surface snow latitudinal variability
10 pags., 5 figs., 2 tabs. During the East Antarctic International Ice Sheet Traverse (Eaiist, december 2019), in an unexplored part of the East Antarctic Plateau, snow samples were collected to expand our knowledge of the latitudinal variability of iodine, bromine and sodium as well as their relati...
Main Authors: | , , , , , , , , , , , , |
---|---|
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2023
|
Subjects: | |
Online Access: | http://hdl.handle.net/10261/343655 https://doi.org/10.1016/j.envres.2023.117344 https://doi.org/10.13039/501100004796 https://doi.org/10.13039/501100001665 https://api.elsevier.com/content/abstract/scopus_id/85173311927 |
id |
ftcsic:oai:digital.csic.es:10261/343655 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/343655 2024-06-23T07:47:50+00:00 Bromine, iodine and sodium along the EAIIST traverse: Bulk and surface snow latitudinal variability Celli, G. Cairns, W. R. L. Scarchilli, C. Cuevas, Carlos A. Saiz-Lopez, A. Savarino, J. Stenni, B. Frezzotti, M. Becagli, S. Delmonte, B. Angot, H. Fernandez, R. P. Spolaor, A. Programma Nazionale di Ricerche in Antartide Agence Nationale de la Recherche (France) BNP Paribas Institut Polaire Français Paul Emile Victor Celli, G. Scarchilli, C. Cuevas, Carlos A. Savarino, J. Stenni, B. Frezzotti, M. Becagli, S. Angot, H. Spolaor, A. 2023-12-15 http://hdl.handle.net/10261/343655 https://doi.org/10.1016/j.envres.2023.117344 https://doi.org/10.13039/501100004796 https://doi.org/10.13039/501100001665 https://api.elsevier.com/content/abstract/scopus_id/85173311927 en eng Elsevier Environmental research Publisher's version https://doi.org/10.1016/j.envres.2023.117344 Sí Environmental Research 239(1): 117344 (2023) 0013-9351 http://hdl.handle.net/10261/343655 doi:10.1016/j.envres.2023.117344 http://dx.doi.org/10.13039/501100004796 http://dx.doi.org/10.13039/501100001665 37821067 2-s2.0-85173311927 https://api.elsevier.com/content/abstract/scopus_id/85173311927 open Antarctica Halogens Photochemistry Snowpack Spatial distribution artículo http://purl.org/coar/resource_type/c_6501 2023 ftcsic https://doi.org/10.1016/j.envres.2023.11734410.13039/50110000479610.13039/501100001665 2024-05-29T00:05:22Z 10 pags., 5 figs., 2 tabs. During the East Antarctic International Ice Sheet Traverse (Eaiist, december 2019), in an unexplored part of the East Antarctic Plateau, snow samples were collected to expand our knowledge of the latitudinal variability of iodine, bromine and sodium as well as their relation in connection with emission processes and photochemical activation in this unexplored area. A total of 32 surface (0-5 cm) and 32 bulk (average of 1 m depth) samples were taken and analysed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Our results show that there is no relevant latitudinal trend for bromine and sodium. For bromine they also show that it has no significant post-depositional mechanisms while its inland surface snow concentration is influenced by spring coastal bromine explosions. Iodine concentrations are several orders of magnitude lower than bromine and sodium and they show a decreasing trend in the surface samples concentration moving southward. This suggests that other processes affect its accumulation in surface snow, probably related to the radial reduction in the ozone layer moving towards central Antarctica. Even though all iodine, bromine and sodium present similar long-range transport from the dominant coastal Antarctic sources, the annual seasonal cycle of the ozone hole over Antarctica increases the amount of UV radiation (in the 280-320 nm range) reaching the surface, thereby affecting the surface snow photoactivation of iodine. A comparison between the bulk and surface samples supports the conclusion that iodine undergoes spring and summer snow recycling that increases its atmospheric lifetime, while it tends to accumulate during the winter months when photochemistry ceases. This project received funding from the by the “Programma Nazionale per la Ricerca in Antartide” (PNRA, project number PNRA16_049). Funding also provided by the Agence Nationale de la Recherche (ANR): ANR-10- LABX56, ANR-11-EQPX-009-CLIMCOR, ANR-16-CE01-0011-01 (J.S.), BNP-Paribas Climate Initiative ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Antartide Ice Sheet Digital.CSIC (Spanish National Research Council) Antarctic |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Antarctica Halogens Photochemistry Snowpack Spatial distribution |
spellingShingle |
Antarctica Halogens Photochemistry Snowpack Spatial distribution Celli, G. Cairns, W. R. L. Scarchilli, C. Cuevas, Carlos A. Saiz-Lopez, A. Savarino, J. Stenni, B. Frezzotti, M. Becagli, S. Delmonte, B. Angot, H. Fernandez, R. P. Spolaor, A. Bromine, iodine and sodium along the EAIIST traverse: Bulk and surface snow latitudinal variability |
topic_facet |
Antarctica Halogens Photochemistry Snowpack Spatial distribution |
description |
10 pags., 5 figs., 2 tabs. During the East Antarctic International Ice Sheet Traverse (Eaiist, december 2019), in an unexplored part of the East Antarctic Plateau, snow samples were collected to expand our knowledge of the latitudinal variability of iodine, bromine and sodium as well as their relation in connection with emission processes and photochemical activation in this unexplored area. A total of 32 surface (0-5 cm) and 32 bulk (average of 1 m depth) samples were taken and analysed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Our results show that there is no relevant latitudinal trend for bromine and sodium. For bromine they also show that it has no significant post-depositional mechanisms while its inland surface snow concentration is influenced by spring coastal bromine explosions. Iodine concentrations are several orders of magnitude lower than bromine and sodium and they show a decreasing trend in the surface samples concentration moving southward. This suggests that other processes affect its accumulation in surface snow, probably related to the radial reduction in the ozone layer moving towards central Antarctica. Even though all iodine, bromine and sodium present similar long-range transport from the dominant coastal Antarctic sources, the annual seasonal cycle of the ozone hole over Antarctica increases the amount of UV radiation (in the 280-320 nm range) reaching the surface, thereby affecting the surface snow photoactivation of iodine. A comparison between the bulk and surface samples supports the conclusion that iodine undergoes spring and summer snow recycling that increases its atmospheric lifetime, while it tends to accumulate during the winter months when photochemistry ceases. This project received funding from the by the “Programma Nazionale per la Ricerca in Antartide” (PNRA, project number PNRA16_049). Funding also provided by the Agence Nationale de la Recherche (ANR): ANR-10- LABX56, ANR-11-EQPX-009-CLIMCOR, ANR-16-CE01-0011-01 (J.S.), BNP-Paribas Climate Initiative ... |
author2 |
Programma Nazionale di Ricerche in Antartide Agence Nationale de la Recherche (France) BNP Paribas Institut Polaire Français Paul Emile Victor Celli, G. Scarchilli, C. Cuevas, Carlos A. Savarino, J. Stenni, B. Frezzotti, M. Becagli, S. Angot, H. Spolaor, A. |
format |
Article in Journal/Newspaper |
author |
Celli, G. Cairns, W. R. L. Scarchilli, C. Cuevas, Carlos A. Saiz-Lopez, A. Savarino, J. Stenni, B. Frezzotti, M. Becagli, S. Delmonte, B. Angot, H. Fernandez, R. P. Spolaor, A. |
author_facet |
Celli, G. Cairns, W. R. L. Scarchilli, C. Cuevas, Carlos A. Saiz-Lopez, A. Savarino, J. Stenni, B. Frezzotti, M. Becagli, S. Delmonte, B. Angot, H. Fernandez, R. P. Spolaor, A. |
author_sort |
Celli, G. |
title |
Bromine, iodine and sodium along the EAIIST traverse: Bulk and surface snow latitudinal variability |
title_short |
Bromine, iodine and sodium along the EAIIST traverse: Bulk and surface snow latitudinal variability |
title_full |
Bromine, iodine and sodium along the EAIIST traverse: Bulk and surface snow latitudinal variability |
title_fullStr |
Bromine, iodine and sodium along the EAIIST traverse: Bulk and surface snow latitudinal variability |
title_full_unstemmed |
Bromine, iodine and sodium along the EAIIST traverse: Bulk and surface snow latitudinal variability |
title_sort |
bromine, iodine and sodium along the eaiist traverse: bulk and surface snow latitudinal variability |
publisher |
Elsevier |
publishDate |
2023 |
url |
http://hdl.handle.net/10261/343655 https://doi.org/10.1016/j.envres.2023.117344 https://doi.org/10.13039/501100004796 https://doi.org/10.13039/501100001665 https://api.elsevier.com/content/abstract/scopus_id/85173311927 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Antartide Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Antartide Ice Sheet |
op_relation |
Environmental research Publisher's version https://doi.org/10.1016/j.envres.2023.117344 Sí Environmental Research 239(1): 117344 (2023) 0013-9351 http://hdl.handle.net/10261/343655 doi:10.1016/j.envres.2023.117344 http://dx.doi.org/10.13039/501100004796 http://dx.doi.org/10.13039/501100001665 37821067 2-s2.0-85173311927 https://api.elsevier.com/content/abstract/scopus_id/85173311927 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.envres.2023.11734410.13039/50110000479610.13039/501100001665 |
_version_ |
1802638042961281024 |