200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica
AbstractA 42.2 m firn core was collected at the Hercules Névé plateau (100 km inland and 2960 m a.s.L), northern Victoria Land, during the 1994-95 Italian Antarctic Expedition. Chemical (Cl–, NO3–, SO42–'; δ18O δ18O δ18O; m-2a-1) and isotope (5180) analyses were performed to evaluate the snow-a...
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1999
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ftopenaccessrep:oai:zenodo.org:121979 2023-10-29T02:30:58+01:00 200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica L. Cimino Raffaela Caprioli S. ToRcini Valter Maggi Barbara Stenni R. Gragnani O. Flora Antonio Longinelli Carlo Cremisini 1999-01-01 https://www.openaccessrepository.it/record/121979 https://doi.org/10.3189/172756499781821175 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/121979 doi:10.3189/172756499781821175 info:eu-repo/semantics/openAccess EUTOPIA Alliance NEANIAS Atmospheric Research Community Earth-Surface Processes info:eu-repo/semantics/article publication-article 1999 ftopenaccessrep https://doi.org/10.3189/172756499781821175 2023-10-03T22:17:06Z AbstractA 42.2 m firn core was collected at the Hercules Névé plateau (100 km inland and 2960 m a.s.L), northern Victoria Land, during the 1994-95 Italian Antarctic Expedition. Chemical (Cl–, NO3–, SO42–'; δ18O δ18O δ18O; m-2a-1) and isotope (5180) analyses were performed to evaluate the snow-accumulation rate at this site. Tritium measurements were performed in the upper part of the core to narrow down the dating of the core.High nssSO42- concentrations seem to be related to some explosive volcanic eruptions, such as Tambora (AD 1815) and the preceding event called "Unknown" (AD 1809), Coseguina (AD 1835), Makjan (AD 1861), Krakatoa (AD 1883) and Tarawera (AD 1886).A comparison between the seasonal variations observed in the isotope and chemical profiles was carried out in order to reduce the dating uncertainty, using the tritium and the volcanic markers as time constraints. A deposition period of 222 years was determined.The 3 year smoothed «5180 profile shows more negative values from the bottom of the core (dated AD 1770) throughout the 19th century, suggesting "cooler" conditions, in agreement with other East Antarctic ice-core records! Subsequently, a general increase in δ180-values is observed.The calculated average snow-accumulation rates between the above-mentioned time markers are 111-129 kg m-2a-1. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Victoria Land Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Annals of Glaciology 29 106 112 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
EUTOPIA Alliance NEANIAS Atmospheric Research Community Earth-Surface Processes |
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EUTOPIA Alliance NEANIAS Atmospheric Research Community Earth-Surface Processes L. Cimino Raffaela Caprioli S. ToRcini Valter Maggi Barbara Stenni R. Gragnani O. Flora Antonio Longinelli Carlo Cremisini 200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica |
topic_facet |
EUTOPIA Alliance NEANIAS Atmospheric Research Community Earth-Surface Processes |
description |
AbstractA 42.2 m firn core was collected at the Hercules Névé plateau (100 km inland and 2960 m a.s.L), northern Victoria Land, during the 1994-95 Italian Antarctic Expedition. Chemical (Cl–, NO3–, SO42–'; δ18O δ18O δ18O; m-2a-1) and isotope (5180) analyses were performed to evaluate the snow-accumulation rate at this site. Tritium measurements were performed in the upper part of the core to narrow down the dating of the core.High nssSO42- concentrations seem to be related to some explosive volcanic eruptions, such as Tambora (AD 1815) and the preceding event called "Unknown" (AD 1809), Coseguina (AD 1835), Makjan (AD 1861), Krakatoa (AD 1883) and Tarawera (AD 1886).A comparison between the seasonal variations observed in the isotope and chemical profiles was carried out in order to reduce the dating uncertainty, using the tritium and the volcanic markers as time constraints. A deposition period of 222 years was determined.The 3 year smoothed «5180 profile shows more negative values from the bottom of the core (dated AD 1770) throughout the 19th century, suggesting "cooler" conditions, in agreement with other East Antarctic ice-core records! Subsequently, a general increase in δ180-values is observed.The calculated average snow-accumulation rates between the above-mentioned time markers are 111-129 kg m-2a-1. |
format |
Article in Journal/Newspaper |
author |
L. Cimino Raffaela Caprioli S. ToRcini Valter Maggi Barbara Stenni R. Gragnani O. Flora Antonio Longinelli Carlo Cremisini |
author_facet |
L. Cimino Raffaela Caprioli S. ToRcini Valter Maggi Barbara Stenni R. Gragnani O. Flora Antonio Longinelli Carlo Cremisini |
author_sort |
L. Cimino |
title |
200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica |
title_short |
200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica |
title_full |
200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica |
title_fullStr |
200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica |
title_full_unstemmed |
200 years of isotope and chemical records in a firn core from Hercules Névé, northern Victoria Land, Antarctica |
title_sort |
200 years of isotope and chemical records in a firn core from hercules névé, northern victoria land, antarctica |
publishDate |
1999 |
url |
https://www.openaccessrepository.it/record/121979 https://doi.org/10.3189/172756499781821175 |
genre |
Antarc* Antarctic Antarctica ice core Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica ice core Victoria Land |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/121979 doi:10.3189/172756499781821175 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3189/172756499781821175 |
container_title |
Annals of Glaciology |
container_volume |
29 |
container_start_page |
106 |
op_container_end_page |
112 |
_version_ |
1781064246311780352 |