Volcanic Fluxes Over the Last Millennium as Recorded in the Gv7 Ice Core (Northern Victoria Land, Antarctica)
Major explosive volcanic eruptions may significantly alter the global atmosphere for about 2−3 years. During that period, volcanic products (mainly H<sub>2</sub>SO<sub>4</sub>) with high residence time, stored in the stratosphere or, for shorter times, in the tropos...
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MDPI AG
2020-01-01
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| Series: | Geosciences |
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| Online Access: | https://www.mdpi.com/2076-3263/10/1/38 |
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doaj-8316430d3a984261989f113b5d77ae8d2020-11-25T02:03:23ZengMDPI AGGeosciences2076-32632020-01-011013810.3390/geosciences10010038geosciences10010038Volcanic Fluxes Over the Last Millennium as Recorded in the Gv7 Ice Core (Northern Victoria Land, Antarctica)Raffaello Nardin0Alessandra Amore1Silvia Becagli2Laura Caiazzo3Massimo Frezzotti4Mirko Severi5Barbara Stenni6Rita Traversi7Department of Chemistry “Ugo Schiff”, University of Florence, 50019 Florence, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, 50019 Florence, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, 50019 Florence, ItalyNational Institute of Nuclear Physics (INFN), 50019 Florenc, ItalyDepartment of Sciences, Università degli Studi Roma Tre, 00146 Rome, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, 50019 Florence, ItalyDepartment of Environmental Sciences, Informatics and Statistics, Ca’ Foscari University of Venice, 30170 Venezia Mestre, ItalyDepartment of Chemistry “Ugo Schiff”, University of Florence, 50019 Florence, ItalyMajor explosive volcanic eruptions may significantly alter the global atmosphere for about 2−3 years. During that period, volcanic products (mainly H<sub>2</sub>SO<sub>4</sub>) with high residence time, stored in the stratosphere or, for shorter times, in the troposphere are gradually deposited onto polar ice caps. Antarctic snow may thus record acidic signals providing a history of past volcanic events. The high resolution sulphate concentration profile along a 197 m long ice core drilled at GV7 (Northern Victoria land) was obtained by Ion Chromatography on around 3500 discrete samples. The relatively high accumulation rate (241 ± 13 mm we yr <sup>−1</sup>) and the 5-cm sampling resolution allowed a preliminary counted age scale. The obtained stratigraphy covers roughly the last millennium and 24 major volcanic eruptions were identified, dated, and tentatively ascribed to a source volcano. The deposition flux of volcanic sulphate was calculated for each signature and the results were compared with data from other Antarctic ice cores at regional and continental scale. Our results show that the regional variability is of the same order of magnitude as the continental one.https://www.mdpi.com/2076-3263/10/1/38volcanismantarcticaion chromatographypaleoclimateice corestephra |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Raffaello Nardin Alessandra Amore Silvia Becagli Laura Caiazzo Massimo Frezzotti Mirko Severi Barbara Stenni Rita Traversi |
| spellingShingle |
Raffaello Nardin Alessandra Amore Silvia Becagli Laura Caiazzo Massimo Frezzotti Mirko Severi Barbara Stenni Rita Traversi Volcanic Fluxes Over the Last Millennium as Recorded in the Gv7 Ice Core (Northern Victoria Land, Antarctica) Geosciences volcanism antarctica ion chromatography paleoclimate ice cores tephra |
| author_facet |
Raffaello Nardin Alessandra Amore Silvia Becagli Laura Caiazzo Massimo Frezzotti Mirko Severi Barbara Stenni Rita Traversi |
| author_sort |
Raffaello Nardin |
| title |
Volcanic Fluxes Over the Last Millennium as Recorded in the Gv7 Ice Core (Northern Victoria Land, Antarctica) |
| title_short |
Volcanic Fluxes Over the Last Millennium as Recorded in the Gv7 Ice Core (Northern Victoria Land, Antarctica) |
| title_full |
Volcanic Fluxes Over the Last Millennium as Recorded in the Gv7 Ice Core (Northern Victoria Land, Antarctica) |
| title_fullStr |
Volcanic Fluxes Over the Last Millennium as Recorded in the Gv7 Ice Core (Northern Victoria Land, Antarctica) |
| title_full_unstemmed |
Volcanic Fluxes Over the Last Millennium as Recorded in the Gv7 Ice Core (Northern Victoria Land, Antarctica) |
| title_sort |
volcanic fluxes over the last millennium as recorded in the gv7 ice core (northern victoria land, antarctica) |
| publisher |
MDPI AG |
| series |
Geosciences |
| issn |
2076-3263 |
| publishDate |
2020-01-01 |
| description |
Major explosive volcanic eruptions may significantly alter the global atmosphere for about 2−3 years. During that period, volcanic products (mainly H<sub>2</sub>SO<sub>4</sub>) with high residence time, stored in the stratosphere or, for shorter times, in the troposphere are gradually deposited onto polar ice caps. Antarctic snow may thus record acidic signals providing a history of past volcanic events. The high resolution sulphate concentration profile along a 197 m long ice core drilled at GV7 (Northern Victoria land) was obtained by Ion Chromatography on around 3500 discrete samples. The relatively high accumulation rate (241 ± 13 mm we yr <sup>−1</sup>) and the 5-cm sampling resolution allowed a preliminary counted age scale. The obtained stratigraphy covers roughly the last millennium and 24 major volcanic eruptions were identified, dated, and tentatively ascribed to a source volcano. The deposition flux of volcanic sulphate was calculated for each signature and the results were compared with data from other Antarctic ice cores at regional and continental scale. Our results show that the regional variability is of the same order of magnitude as the continental one. |
| topic |
volcanism antarctica ion chromatography paleoclimate ice cores tephra |
| url |
https://www.mdpi.com/2076-3263/10/1/38 |
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