Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land)
In this work we present the isotopic, chemical and dust stratigraphies of two snow pits sampled in 2013/14 at GV7 (coastal East Antarctica: 70°41′ S - 158°51′ E, 1950 m a.s.l.). A large number of chemical species are measured aiming to study their potentiality as environmental changes markers. Seaso...
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ftenea:oai:iris.enea.it:20.500.12079/1758 2024-04-21T07:52:08+00:00 Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land) Frezzotti, M. Scarchilli, C. Proposito, M. Narcisi, B. Frezzotti, M. Scarchilli, C. Proposito, M. Narcisi, B. 2017 https://hdl.handle.net/20.500.12079/1758 https://doi.org/10.1016/j.chemosphere.2017.02.115 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014451864&doi=10.1016%2fj.chemosphere.2017.02.115&partnerID=40&md5=65e6b8c154dcdefeaf5e878fd8b8f8cd en eng Elsevier Ltd volume:176 numberofpages:273 - 287 journal:CHEMOSPHERE http://hdl.handle.net/20.500.12079/1758 doi:10.1016/j.chemosphere.2017.02.115 info:eu-repo/semantics/altIdentifier/scopus/Scopus ID: 2-s2.0-85014451864 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014451864&doi=10.1016%2fj.chemosphere.2017.02.115&partnerID=40&md5=65e6b8c154dcdefeaf5e878fd8b8f8cd Snow pit GV7 Dating East Antarctica Seasonal pattern Chemical composition info:eu-repo/semantics/article 2017 ftenea https://doi.org/20.500.12079/175810.1016/j.chemosphere.2017.02.115 2024-03-27T15:05:15Z In this work we present the isotopic, chemical and dust stratigraphies of two snow pits sampled in 2013/14 at GV7 (coastal East Antarctica: 70°41′ S - 158°51′ E, 1950 m a.s.l.). A large number of chemical species are measured aiming to study their potentiality as environmental changes markers. Seasonal cluster backward trajectories analysis was performed and compared with chemical marker stratigraphies. Sea spray aerosol is delivered to the sampling site together with snow precipitation especially in autumn-winter by air masses arising from Western Pacific Ocean sector. Dust show maximum concentration in spring when the air masses arising from Ross Sea sector mobilize mineral dust from ice-free areas of the Transantarctic mountains. The clear seasonal pattern of sulfur oxidized compounds allows the dating of the snow-pit and the calculation of the mean accumulation rate, which is 242 ± 71 mm w.e. for the period 2008–2013. Methanesulfonic acid and NO3 − do not show any concentration decreasing trend as depth increases, also considering a 12 m firn core record. Therefore these two compounds are not affected by post-depositional processes at this site and can be considered reliable markers for past environmental changes reconstruction. The rBC snow-pit record shows the highest values in summer 2012 likely related to large biomass burning even occurred in Australia in this summer. The undisturbed accumulation rate for this site is demonstrated by the agreement between the chemical stratigraphies and the annual accumulation rate of the two snow-pits analysed in Italian and Korean laboratories. © 2017 Elsevier Ltd Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ross Sea Wilkes Land ENEA-IRIS Open Archive (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile) Chemosphere 176 273 287 |
institution |
Open Polar |
collection |
ENEA-IRIS Open Archive (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile) |
op_collection_id |
ftenea |
language |
English |
topic |
Snow pit GV7 Dating East Antarctica Seasonal pattern Chemical composition |
spellingShingle |
Snow pit GV7 Dating East Antarctica Seasonal pattern Chemical composition Frezzotti, M. Scarchilli, C. Proposito, M. Narcisi, B. Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land) |
topic_facet |
Snow pit GV7 Dating East Antarctica Seasonal pattern Chemical composition |
description |
In this work we present the isotopic, chemical and dust stratigraphies of two snow pits sampled in 2013/14 at GV7 (coastal East Antarctica: 70°41′ S - 158°51′ E, 1950 m a.s.l.). A large number of chemical species are measured aiming to study their potentiality as environmental changes markers. Seasonal cluster backward trajectories analysis was performed and compared with chemical marker stratigraphies. Sea spray aerosol is delivered to the sampling site together with snow precipitation especially in autumn-winter by air masses arising from Western Pacific Ocean sector. Dust show maximum concentration in spring when the air masses arising from Ross Sea sector mobilize mineral dust from ice-free areas of the Transantarctic mountains. The clear seasonal pattern of sulfur oxidized compounds allows the dating of the snow-pit and the calculation of the mean accumulation rate, which is 242 ± 71 mm w.e. for the period 2008–2013. Methanesulfonic acid and NO3 − do not show any concentration decreasing trend as depth increases, also considering a 12 m firn core record. Therefore these two compounds are not affected by post-depositional processes at this site and can be considered reliable markers for past environmental changes reconstruction. The rBC snow-pit record shows the highest values in summer 2012 likely related to large biomass burning even occurred in Australia in this summer. The undisturbed accumulation rate for this site is demonstrated by the agreement between the chemical stratigraphies and the annual accumulation rate of the two snow-pits analysed in Italian and Korean laboratories. © 2017 Elsevier Ltd |
author2 |
Frezzotti, M. Scarchilli, C. Proposito, M. Narcisi, B. |
format |
Article in Journal/Newspaper |
author |
Frezzotti, M. Scarchilli, C. Proposito, M. Narcisi, B. |
author_facet |
Frezzotti, M. Scarchilli, C. Proposito, M. Narcisi, B. |
author_sort |
Frezzotti, M. |
title |
Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land) |
title_short |
Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land) |
title_full |
Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land) |
title_fullStr |
Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land) |
title_full_unstemmed |
Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land) |
title_sort |
prominent features in isotopic, chemical and dust stratigraphies from coastal east antarctic ice sheet (eastern wilkes land) |
publisher |
Elsevier Ltd |
publishDate |
2017 |
url |
https://hdl.handle.net/20.500.12079/1758 https://doi.org/10.1016/j.chemosphere.2017.02.115 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014451864&doi=10.1016%2fj.chemosphere.2017.02.115&partnerID=40&md5=65e6b8c154dcdefeaf5e878fd8b8f8cd |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ross Sea Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ross Sea Wilkes Land |
op_relation |
volume:176 numberofpages:273 - 287 journal:CHEMOSPHERE http://hdl.handle.net/20.500.12079/1758 doi:10.1016/j.chemosphere.2017.02.115 info:eu-repo/semantics/altIdentifier/scopus/Scopus ID: 2-s2.0-85014451864 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014451864&doi=10.1016%2fj.chemosphere.2017.02.115&partnerID=40&md5=65e6b8c154dcdefeaf5e878fd8b8f8cd |
op_doi |
https://doi.org/20.500.12079/175810.1016/j.chemosphere.2017.02.115 |
container_title |
Chemosphere |
container_volume |
176 |
container_start_page |
273 |
op_container_end_page |
287 |
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1796935388659449856 |