Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis
A multiparametric (chemical, isotopic and physical) study on three shallow firm cores sampled in northern Victoria Land was carried out to obtain glaciological information and climatic data in this Antarctic region. Sampling areas were accurately prospected to identify sites, located at different al...
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ftunivroma3iris:oai:iris.uniroma3.it:11590/353637 2024-02-27T08:34:15+00:00 Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis Stenni B. Serra F. Frezzotti M. Maggi V. Traver R. Begagli S. Udisti R. Stenni, B. Serra, F. Frezzotti, M. Maggi, V. Traver, R. Begagli, S. Udisti, R. 2000 http://hdl.handle.net/11590/353637 eng eng volume:46 issue:155 firstpage:541 lastpage:552 numberofpages:12 journal:JOURNAL OF GLACIOLOGY http://hdl.handle.net/11590/353637 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0034451390 info:eu-repo/semantics/article 2000 ftunivroma3iris 2024-01-31T17:41:08Z A multiparametric (chemical, isotopic and physical) study on three shallow firm cores sampled in northern Victoria Land was carried out to obtain glaciological information and climatic data in this Antarctic region. Sampling areas were accurately prospected to identify sites, located at different altitudes and distances from the sea, where the snow accumulation was not influenced by katabatic wind redistribution or summer melting. Stratigraphic, isotopic (δ18O) and chemical (H2O2, MSA and nssSO42-) profiles were mutually examined for dating purposes and to determine the mean snow-accumulation rates at three different stations. Annual accumulation rates of 85-420 kg m-2a-1 were determined in the period 1971-92. An inverse pattern between accumulation rate and altitude was shown by the progression of the mean annual rates of 160, 203 and 260kg m 2a 1, respectively, in the highest, medium and lowest stations. The mean accumulation value of all northern Victoria Land data available, 170 kg m-2 a-1, represents a decrease of up to 35% with respect to the estimated value most widely used until now. Our accumulation value is very close to that required for a zero net surface mass balance according to ice discharge. A linear relationship with a gradient of 0.81‰ °C-1 has been found between mean δ18O values and mean annual surface temperature for different ice cores drilled in northern Victoria Land. Article in Journal/Newspaper Antarc* Antarctic Antarctica Victoria Land Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) Antarctic Victoria Land |
institution |
Open Polar |
collection |
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) |
op_collection_id |
ftunivroma3iris |
language |
English |
description |
A multiparametric (chemical, isotopic and physical) study on three shallow firm cores sampled in northern Victoria Land was carried out to obtain glaciological information and climatic data in this Antarctic region. Sampling areas were accurately prospected to identify sites, located at different altitudes and distances from the sea, where the snow accumulation was not influenced by katabatic wind redistribution or summer melting. Stratigraphic, isotopic (δ18O) and chemical (H2O2, MSA and nssSO42-) profiles were mutually examined for dating purposes and to determine the mean snow-accumulation rates at three different stations. Annual accumulation rates of 85-420 kg m-2a-1 were determined in the period 1971-92. An inverse pattern between accumulation rate and altitude was shown by the progression of the mean annual rates of 160, 203 and 260kg m 2a 1, respectively, in the highest, medium and lowest stations. The mean accumulation value of all northern Victoria Land data available, 170 kg m-2 a-1, represents a decrease of up to 35% with respect to the estimated value most widely used until now. Our accumulation value is very close to that required for a zero net surface mass balance according to ice discharge. A linear relationship with a gradient of 0.81‰ °C-1 has been found between mean δ18O values and mean annual surface temperature for different ice cores drilled in northern Victoria Land. |
author2 |
Stenni, B. Serra, F. Frezzotti, M. Maggi, V. Traver, R. Begagli, S. Udisti, R. |
format |
Article in Journal/Newspaper |
author |
Stenni B. Serra F. Frezzotti M. Maggi V. Traver R. Begagli S. Udisti R. |
spellingShingle |
Stenni B. Serra F. Frezzotti M. Maggi V. Traver R. Begagli S. Udisti R. Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis |
author_facet |
Stenni B. Serra F. Frezzotti M. Maggi V. Traver R. Begagli S. Udisti R. |
author_sort |
Stenni B. |
title |
Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis |
title_short |
Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis |
title_full |
Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis |
title_fullStr |
Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis |
title_full_unstemmed |
Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis |
title_sort |
snow accumulation rates in northern victoria land, antarctica, by firm-core analysis |
publishDate |
2000 |
url |
http://hdl.handle.net/11590/353637 |
geographic |
Antarctic Victoria Land |
geographic_facet |
Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Victoria Land |
op_relation |
volume:46 issue:155 firstpage:541 lastpage:552 numberofpages:12 journal:JOURNAL OF GLACIOLOGY http://hdl.handle.net/11590/353637 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0034451390 |
_version_ |
1792053230214053888 |