Spatial and temporal variations in surface snow chemistry along a traverse from Dome C toward South Pole in the framework of East Antarctic International Ice Sheet Traverse (EAIIST) project
As part of the “East Antarctic International Ice Sheet Traverse” (EAIIST) project, surface snow and snow pit samples were collected along a traverse from Dome C toward the geographic South Pole during the 2019–2020 Antarctic campaign. Results on spatial distribution of major ions are here reported t...
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ftcopernicus:oai:publications.copernicus.org:egusphere109994 2023-06-11T04:07:06+02:00 Spatial and temporal variations in surface snow chemistry along a traverse from Dome C toward South Pole in the framework of East Antarctic International Ice Sheet Traverse (EAIIST) project Ventisette, Simone Baldini, Samuele Artoni, Claudio Becagli, Silvia Caiazzo, Laura Delmonte, Barbara Frezzotti, Massimo Nardin, Raffaello Savarino, Joel Severi, Mirko Spolaor, Andrea Stenni, Barbara Traversi, Rita 2023-04-26 application/pdf https://doi.org/10.5194/egusphere-2023-393 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-393/ eng eng doi:10.5194/egusphere-2023-393 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-393/ eISSN: Text 2023 ftcopernicus https://doi.org/10.5194/egusphere-2023-393 2023-05-01T16:23:11Z As part of the “East Antarctic International Ice Sheet Traverse” (EAIIST) project, surface snow and snow pit samples were collected along a traverse from Dome C toward the geographic South Pole during the 2019–2020 Antarctic campaign. Results on spatial distribution of major ions are here reported to understand deposition and post deposition processes in sites with very low snow accumulation rate in the East Antarctic Plateau where megadune and wind crust areas are present. The volcanic signature of Pinatubo eruption (occurred in 1991) was clearly visible in the non-sea salt SO 4 2− stratigraphy from two snow pits (AGO-5 and PALEO) allowing the determination of annual accumulation rates that revealed to be 25.7 and 22.6 mm of water equivalent/year, respectively at the two sites. Moreover, a decreasing trend in accumulation rate as the distance from the Indian Ocean increases was detected. Mineral dust concentration and size show presence of a criptotephra layer in AGO5 and PALEO stratigraphies which is stratigraphically compatible with the deposition of volcanic ash related to the Puyehue-Cordón Caulle explosive eruption occurred in June 2011. The ssNa + fraction, accounting for the 92.5 % of the total Na + , is preserved stably in the snow layers and was chosen as marker of sea spray deposition. Despite the very low accumulation rate in this area, the main deposition process of sea spray aerosol is the wet deposition. Conversely, both biogenic and crustal nssSO 4 2− are dry deposited, the total flux of nssSO 4 2− resulted to be constant in the Antarctic plateau, but the biogenic to crustal ratio increases as distance from Dome C increases. The presence and quantification (by nssCa 2+ ) of a dry deposited crustal source, as the biogenic one, sheds light on the interpretation of nssSO 4 2− biogenic stratigraphy during glacial and interglacial time in Antarctic ice cores. NssCl − represent the fraction of Cl − deposited as HCl and arises from the exchange reactions between chloride in the sea salt aerosol and ... Text Antarc* Antarctic Ice Sheet South pole South pole Copernicus Publications: E-Journals Antarctic Indian South Pole The Antarctic |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
As part of the “East Antarctic International Ice Sheet Traverse” (EAIIST) project, surface snow and snow pit samples were collected along a traverse from Dome C toward the geographic South Pole during the 2019–2020 Antarctic campaign. Results on spatial distribution of major ions are here reported to understand deposition and post deposition processes in sites with very low snow accumulation rate in the East Antarctic Plateau where megadune and wind crust areas are present. The volcanic signature of Pinatubo eruption (occurred in 1991) was clearly visible in the non-sea salt SO 4 2− stratigraphy from two snow pits (AGO-5 and PALEO) allowing the determination of annual accumulation rates that revealed to be 25.7 and 22.6 mm of water equivalent/year, respectively at the two sites. Moreover, a decreasing trend in accumulation rate as the distance from the Indian Ocean increases was detected. Mineral dust concentration and size show presence of a criptotephra layer in AGO5 and PALEO stratigraphies which is stratigraphically compatible with the deposition of volcanic ash related to the Puyehue-Cordón Caulle explosive eruption occurred in June 2011. The ssNa + fraction, accounting for the 92.5 % of the total Na + , is preserved stably in the snow layers and was chosen as marker of sea spray deposition. Despite the very low accumulation rate in this area, the main deposition process of sea spray aerosol is the wet deposition. Conversely, both biogenic and crustal nssSO 4 2− are dry deposited, the total flux of nssSO 4 2− resulted to be constant in the Antarctic plateau, but the biogenic to crustal ratio increases as distance from Dome C increases. The presence and quantification (by nssCa 2+ ) of a dry deposited crustal source, as the biogenic one, sheds light on the interpretation of nssSO 4 2− biogenic stratigraphy during glacial and interglacial time in Antarctic ice cores. NssCl − represent the fraction of Cl − deposited as HCl and arises from the exchange reactions between chloride in the sea salt aerosol and ... |
format |
Text |
author |
Ventisette, Simone Baldini, Samuele Artoni, Claudio Becagli, Silvia Caiazzo, Laura Delmonte, Barbara Frezzotti, Massimo Nardin, Raffaello Savarino, Joel Severi, Mirko Spolaor, Andrea Stenni, Barbara Traversi, Rita |
spellingShingle |
Ventisette, Simone Baldini, Samuele Artoni, Claudio Becagli, Silvia Caiazzo, Laura Delmonte, Barbara Frezzotti, Massimo Nardin, Raffaello Savarino, Joel Severi, Mirko Spolaor, Andrea Stenni, Barbara Traversi, Rita Spatial and temporal variations in surface snow chemistry along a traverse from Dome C toward South Pole in the framework of East Antarctic International Ice Sheet Traverse (EAIIST) project |
author_facet |
Ventisette, Simone Baldini, Samuele Artoni, Claudio Becagli, Silvia Caiazzo, Laura Delmonte, Barbara Frezzotti, Massimo Nardin, Raffaello Savarino, Joel Severi, Mirko Spolaor, Andrea Stenni, Barbara Traversi, Rita |
author_sort |
Ventisette, Simone |
title |
Spatial and temporal variations in surface snow chemistry along a traverse from Dome C toward South Pole in the framework of East Antarctic International Ice Sheet Traverse (EAIIST) project |
title_short |
Spatial and temporal variations in surface snow chemistry along a traverse from Dome C toward South Pole in the framework of East Antarctic International Ice Sheet Traverse (EAIIST) project |
title_full |
Spatial and temporal variations in surface snow chemistry along a traverse from Dome C toward South Pole in the framework of East Antarctic International Ice Sheet Traverse (EAIIST) project |
title_fullStr |
Spatial and temporal variations in surface snow chemistry along a traverse from Dome C toward South Pole in the framework of East Antarctic International Ice Sheet Traverse (EAIIST) project |
title_full_unstemmed |
Spatial and temporal variations in surface snow chemistry along a traverse from Dome C toward South Pole in the framework of East Antarctic International Ice Sheet Traverse (EAIIST) project |
title_sort |
spatial and temporal variations in surface snow chemistry along a traverse from dome c toward south pole in the framework of east antarctic international ice sheet traverse (eaiist) project |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-393 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-393/ |
geographic |
Antarctic Indian South Pole The Antarctic |
geographic_facet |
Antarctic Indian South Pole The Antarctic |
genre |
Antarc* Antarctic Ice Sheet South pole South pole |
genre_facet |
Antarc* Antarctic Ice Sheet South pole South pole |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2023-393 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-393/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-393 |
_version_ |
1768379709707517952 |