Dating of the GV7 East Antarctic ice core by high-resolution chemical records and focus on the accumulation rate variability in the last millennium
Ice core dating is the first step for a correct interpretation of climatic and environmental changes. In this work, we release the dating of the uppermost 197g m of the 250g m deep GV7(B) ice core (drill site, 70g 41g S, 158g 52g E; 1950g mg a.s.l. in Oates Land, East Antarctica) with a sub-Annual r...
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Online Access: | http://hdl.handle.net/10278/3745842 https://doi.org/10.5194/cp-17-2073-2021 |
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ftuniveneziairis:oai:iris.unive.it:10278/3745842 2024-04-14T08:02:26+00:00 Dating of the GV7 East Antarctic ice core by high-resolution chemical records and focus on the accumulation rate variability in the last millennium Nardin R. Severi M. Amore A. Becagli S. Burgay F. Caiazzo L. Ciardini V. Dreossi G. Frezzotti M. Hong S. -B. Khan I. Narcisi B. M. Proposito M. Scarchilli C. Selmo E. Spolaor A. Stenni B. Traversi R. Nardin, R. Severi, M. Amore, A. Becagli, S. Burgay, F. Caiazzo, L. Ciardini, V. Dreossi, G. Frezzotti, M. Hong, S. -B. Khan, I. Narcisi, B. M. Proposito, M. Scarchilli, C. Selmo, E. Spolaor, A. Stenni, B. Traversi, R. 2021 http://hdl.handle.net/10278/3745842 https://doi.org/10.5194/cp-17-2073-2021 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000708954300001 volume:17 issue:5 firstpage:2073 lastpage:2089 numberofpages:17 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3745842 doi:10.5194/cp-17-2073-2021 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85117078359 info:eu-repo/semantics/openAccess Settore GEO/08 - Geochimica e Vulcanologia info:eu-repo/semantics/article 2021 ftuniveneziairis https://doi.org/10.5194/cp-17-2073-2021 2024-03-21T18:16:57Z Ice core dating is the first step for a correct interpretation of climatic and environmental changes. In this work, we release the dating of the uppermost 197g m of the 250g m deep GV7(B) ice core (drill site, 70g 41g S, 158g 52g E; 1950g mg a.s.l. in Oates Land, East Antarctica) with a sub-Annual resolution. Chemical records of NO3-, MSA (methanesulfonic acid), non-sea-salt SO42-(nssSO42-), sea-salt ions and water stable isotopes (I18O) were studied as candidates for dating due to their seasonal pattern. Different procedures were tested but the nssSO42-record proved to be the most reliable on the short-and long-Term scales, so it was chosen for annual layer counting along the whole ice core. The dating was constrained by using volcanic signatures from historically known events as tie points, thus providing an accurate age-depth relationship for the period 1179-2009g CE. The achievement of the complete age scale allowed us to calculate the annual mean accumulation rate throughout the analyzed 197g m of the core, yielding an annually resolved history of the snow accumulation on site in the last millennium. A small yet consistent rise in accumulation rate (Tr Combining double low line 1.6, p<0.001) was found for the last 830 years starting around mid-18th century. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Oates Land Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Antarctic East Antarctica Oates Land ENVELOPE(158.000,158.000,-70.000,-70.000) Climate of the Past 17 5 2073 2089 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Settore GEO/08 - Geochimica e Vulcanologia |
spellingShingle |
Settore GEO/08 - Geochimica e Vulcanologia Nardin R. Severi M. Amore A. Becagli S. Burgay F. Caiazzo L. Ciardini V. Dreossi G. Frezzotti M. Hong S. -B. Khan I. Narcisi B. M. Proposito M. Scarchilli C. Selmo E. Spolaor A. Stenni B. Traversi R. Dating of the GV7 East Antarctic ice core by high-resolution chemical records and focus on the accumulation rate variability in the last millennium |
topic_facet |
Settore GEO/08 - Geochimica e Vulcanologia |
description |
Ice core dating is the first step for a correct interpretation of climatic and environmental changes. In this work, we release the dating of the uppermost 197g m of the 250g m deep GV7(B) ice core (drill site, 70g 41g S, 158g 52g E; 1950g mg a.s.l. in Oates Land, East Antarctica) with a sub-Annual resolution. Chemical records of NO3-, MSA (methanesulfonic acid), non-sea-salt SO42-(nssSO42-), sea-salt ions and water stable isotopes (I18O) were studied as candidates for dating due to their seasonal pattern. Different procedures were tested but the nssSO42-record proved to be the most reliable on the short-and long-Term scales, so it was chosen for annual layer counting along the whole ice core. The dating was constrained by using volcanic signatures from historically known events as tie points, thus providing an accurate age-depth relationship for the period 1179-2009g CE. The achievement of the complete age scale allowed us to calculate the annual mean accumulation rate throughout the analyzed 197g m of the core, yielding an annually resolved history of the snow accumulation on site in the last millennium. A small yet consistent rise in accumulation rate (Tr Combining double low line 1.6, p<0.001) was found for the last 830 years starting around mid-18th century. |
author2 |
Nardin, R. Severi, M. Amore, A. Becagli, S. Burgay, F. Caiazzo, L. Ciardini, V. Dreossi, G. Frezzotti, M. Hong, S. -B. Khan, I. Narcisi, B. M. Proposito, M. Scarchilli, C. Selmo, E. Spolaor, A. Stenni, B. Traversi, R. |
format |
Article in Journal/Newspaper |
author |
Nardin R. Severi M. Amore A. Becagli S. Burgay F. Caiazzo L. Ciardini V. Dreossi G. Frezzotti M. Hong S. -B. Khan I. Narcisi B. M. Proposito M. Scarchilli C. Selmo E. Spolaor A. Stenni B. Traversi R. |
author_facet |
Nardin R. Severi M. Amore A. Becagli S. Burgay F. Caiazzo L. Ciardini V. Dreossi G. Frezzotti M. Hong S. -B. Khan I. Narcisi B. M. Proposito M. Scarchilli C. Selmo E. Spolaor A. Stenni B. Traversi R. |
author_sort |
Nardin R. |
title |
Dating of the GV7 East Antarctic ice core by high-resolution chemical records and focus on the accumulation rate variability in the last millennium |
title_short |
Dating of the GV7 East Antarctic ice core by high-resolution chemical records and focus on the accumulation rate variability in the last millennium |
title_full |
Dating of the GV7 East Antarctic ice core by high-resolution chemical records and focus on the accumulation rate variability in the last millennium |
title_fullStr |
Dating of the GV7 East Antarctic ice core by high-resolution chemical records and focus on the accumulation rate variability in the last millennium |
title_full_unstemmed |
Dating of the GV7 East Antarctic ice core by high-resolution chemical records and focus on the accumulation rate variability in the last millennium |
title_sort |
dating of the gv7 east antarctic ice core by high-resolution chemical records and focus on the accumulation rate variability in the last millennium |
publishDate |
2021 |
url |
http://hdl.handle.net/10278/3745842 https://doi.org/10.5194/cp-17-2073-2021 |
long_lat |
ENVELOPE(158.000,158.000,-70.000,-70.000) |
geographic |
Antarctic East Antarctica Oates Land |
geographic_facet |
Antarctic East Antarctica Oates Land |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core Oates Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core Oates Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000708954300001 volume:17 issue:5 firstpage:2073 lastpage:2089 numberofpages:17 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3745842 doi:10.5194/cp-17-2073-2021 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85117078359 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-17-2073-2021 |
container_title |
Climate of the Past |
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17 |
container_issue |
5 |
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2073 |
op_container_end_page |
2089 |
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