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...
Published in: | Journal of Glaciology |
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International Glaciology Society
2000
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Online Access: | http://hdl.handle.net/10281/17842 https://doi.org/10.3189/172756500781832774 |
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ftunivmilanobic:oai:boa.unimib.it:10281/17842 2024-04-14T08:02:24+00:00 Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis Stenni, B Serra, F Frezzotti, M Traversi, R Becagli, S Udisti, R. MAGGI, VALTER Stenni, B Serra, F Frezzotti, M Maggi, V Traversi, R Becagli, S Udisti, R 2000 http://hdl.handle.net/10281/17842 https://doi.org/10.3189/172756500781832774 eng eng International Glaciology Society info:eu-repo/semantics/altIdentifier/wos/WOS:000166938600001 volume:46 issue:155 firstpage:541 lastpage:552 journal:JOURNAL OF GLACIOLOGY http://hdl.handle.net/10281/17842 doi:10.3189/172756500781832774 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0034451390 Antarctica ice cores stable isotopes climatology info:eu-repo/semantics/article 2000 ftunivmilanobic https://doi.org/10.3189/172756500781832774 2024-03-21T16:31:54Z 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 Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Antarctic Victoria Land Journal of Glaciology 46 155 541 552 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
Antarctica ice cores stable isotopes climatology |
spellingShingle |
Antarctica ice cores stable isotopes climatology Stenni, B Serra, F Frezzotti, M Traversi, R Becagli, S Udisti, R. MAGGI, VALTER Snow accumulation rates in northern victoria land, Antarctica, By firm-core analysis |
topic_facet |
Antarctica ice cores stable isotopes climatology |
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 Traversi, R Becagli, S Udisti, R |
format |
Article in Journal/Newspaper |
author |
Stenni, B Serra, F Frezzotti, M Traversi, R Becagli, S Udisti, R. MAGGI, VALTER |
author_facet |
Stenni, B Serra, F Frezzotti, M Traversi, R Becagli, S Udisti, R. MAGGI, VALTER |
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 |
publisher |
International Glaciology Society |
publishDate |
2000 |
url |
http://hdl.handle.net/10281/17842 https://doi.org/10.3189/172756500781832774 |
geographic |
Antarctic Victoria Land |
geographic_facet |
Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000166938600001 volume:46 issue:155 firstpage:541 lastpage:552 journal:JOURNAL OF GLACIOLOGY http://hdl.handle.net/10281/17842 doi:10.3189/172756500781832774 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0034451390 |
op_doi |
https://doi.org/10.3189/172756500781832774 |
container_title |
Journal of Glaciology |
container_volume |
46 |
container_issue |
155 |
container_start_page |
541 |
op_container_end_page |
552 |
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1796314746193969152 |