A new ice-core record from Lomonosovfonna, Svalbard:Viewing the 1920-97 data in relation to present climate and environmental conditions
In 1997 a 121 m ice core was retrieved from Lomonosovfonna, the highest ice field in Spitsbergen, Svalbard (1250 m a.s.l.). Radar measurements indicate an ice depth of 126.5 m, and borehole temperature measurements show that the ice is below the melting point. High-resolution sampling of major ions,...
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ftulaplandcdispu:oai:lacris.ulapland.fi:publications/72725874-cc67-4382-ae44-db159bc5ac2b 2024-01-28T10:04:48+01:00 A new ice-core record from Lomonosovfonna, Svalbard:Viewing the 1920-97 data in relation to present climate and environmental conditions Isaksson, E. Pohjola, V. Jauhiainen, T. Moore, J. Pinglot, J. F. Vaikmäe, R. Van De Wal, R. S.W. Hagen, J. O. Ivask, J. Karlöf, L. Martma, T. Meijer, H. A.J. Mulvaney, R. Thomassen, M. Van Den Broeke, M. 2001-01-01 https://research.ulapland.fi/fi/publications/72725874-cc67-4382-ae44-db159bc5ac2b http://arcticcentre.ulapland.fi/docs/jmoore/isakssonJG2001.pdf eng eng https://research.ulapland.fi/fi/publications/72725874-cc67-4382-ae44-db159bc5ac2b info:eu-repo/semantics/restrictedAccess Isaksson , E , Pohjola , V , Jauhiainen , T , Moore , J , Pinglot , J F , Vaikmäe , R , Van De Wal , R S W , Hagen , J O , Ivask , J , Karlöf , L , Martma , T , Meijer , H A J , Mulvaney , R , Thomassen , M & Van Den Broeke , M 2001 , ' A new ice-core record from Lomonosovfonna, Svalbard : Viewing the 1920-97 data in relation to present climate and environmental conditions ' , Journal of Glaciology , vol. 47 , no. 157 , pp. 335-345 . < http://arcticcentre.ulapland.fi/docs/jmoore/isakssonJG2001.pdf > /dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences article 2001 ftulaplandcdispu 2024-01-04T00:03:18Z In 1997 a 121 m ice core was retrieved from Lomonosovfonna, the highest ice field in Spitsbergen, Svalbard (1250 m a.s.l.). Radar measurements indicate an ice depth of 126.5 m, and borehole temperature measurements show that the ice is below the melting point. High-resolution sampling of major ions, oxygen isotopes and deuterium has been performed on the core, and the results from the uppermost 36 m suggest that quasi-annual signals are preserved. The 1963 radioactive layer is situated at 18.5-18.95 m, giving a mean annual accumulation of 0.36 m w.e. for the period 1963-96. The upper 36 m of the ice core was dated back to 1920 by counting layers provided by the seasonal variations of the ions in addition to using a constant accumulation rate, with thinning by pure shear according to Nye (1963). The stratigraphy does not seem to have been obliterated by meltwater percolation, in contrast to most previous core sites on Svalbard. The anthropogenic influence on the Svalbard environment is illustrated by increased levels of sulphate, nitrate and acidity. Both nitrate and sulphate levels started to increase in the late 1940s, remained high until the late 1980s and have decreased during the last 15 years. The records of δ 18 O, MSA (methanesulphonic acid), and melt features along the core agree with the temperature record from Longyearbyen and the sea-ice record from the Barents Sea at a multi-year resolution, suggesting that this ice core reflects local climatic conditions. Article in Journal/Newspaper Barents Sea ice core Journal of Glaciology Longyearbyen Sea ice Svalbard Spitsbergen LaCRIS - University of Lapland Current Research System Barents Sea Lomonosovfonna ENVELOPE(17.663,17.663,78.774,78.774) Longyearbyen Svalbard |
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Open Polar |
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LaCRIS - University of Lapland Current Research System |
op_collection_id |
ftulaplandcdispu |
language |
English |
topic |
/dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences |
spellingShingle |
/dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences Isaksson, E. Pohjola, V. Jauhiainen, T. Moore, J. Pinglot, J. F. Vaikmäe, R. Van De Wal, R. S.W. Hagen, J. O. Ivask, J. Karlöf, L. Martma, T. Meijer, H. A.J. Mulvaney, R. Thomassen, M. Van Den Broeke, M. A new ice-core record from Lomonosovfonna, Svalbard:Viewing the 1920-97 data in relation to present climate and environmental conditions |
topic_facet |
/dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences |
description |
In 1997 a 121 m ice core was retrieved from Lomonosovfonna, the highest ice field in Spitsbergen, Svalbard (1250 m a.s.l.). Radar measurements indicate an ice depth of 126.5 m, and borehole temperature measurements show that the ice is below the melting point. High-resolution sampling of major ions, oxygen isotopes and deuterium has been performed on the core, and the results from the uppermost 36 m suggest that quasi-annual signals are preserved. The 1963 radioactive layer is situated at 18.5-18.95 m, giving a mean annual accumulation of 0.36 m w.e. for the period 1963-96. The upper 36 m of the ice core was dated back to 1920 by counting layers provided by the seasonal variations of the ions in addition to using a constant accumulation rate, with thinning by pure shear according to Nye (1963). The stratigraphy does not seem to have been obliterated by meltwater percolation, in contrast to most previous core sites on Svalbard. The anthropogenic influence on the Svalbard environment is illustrated by increased levels of sulphate, nitrate and acidity. Both nitrate and sulphate levels started to increase in the late 1940s, remained high until the late 1980s and have decreased during the last 15 years. The records of δ 18 O, MSA (methanesulphonic acid), and melt features along the core agree with the temperature record from Longyearbyen and the sea-ice record from the Barents Sea at a multi-year resolution, suggesting that this ice core reflects local climatic conditions. |
format |
Article in Journal/Newspaper |
author |
Isaksson, E. Pohjola, V. Jauhiainen, T. Moore, J. Pinglot, J. F. Vaikmäe, R. Van De Wal, R. S.W. Hagen, J. O. Ivask, J. Karlöf, L. Martma, T. Meijer, H. A.J. Mulvaney, R. Thomassen, M. Van Den Broeke, M. |
author_facet |
Isaksson, E. Pohjola, V. Jauhiainen, T. Moore, J. Pinglot, J. F. Vaikmäe, R. Van De Wal, R. S.W. Hagen, J. O. Ivask, J. Karlöf, L. Martma, T. Meijer, H. A.J. Mulvaney, R. Thomassen, M. Van Den Broeke, M. |
author_sort |
Isaksson, E. |
title |
A new ice-core record from Lomonosovfonna, Svalbard:Viewing the 1920-97 data in relation to present climate and environmental conditions |
title_short |
A new ice-core record from Lomonosovfonna, Svalbard:Viewing the 1920-97 data in relation to present climate and environmental conditions |
title_full |
A new ice-core record from Lomonosovfonna, Svalbard:Viewing the 1920-97 data in relation to present climate and environmental conditions |
title_fullStr |
A new ice-core record from Lomonosovfonna, Svalbard:Viewing the 1920-97 data in relation to present climate and environmental conditions |
title_full_unstemmed |
A new ice-core record from Lomonosovfonna, Svalbard:Viewing the 1920-97 data in relation to present climate and environmental conditions |
title_sort |
new ice-core record from lomonosovfonna, svalbard:viewing the 1920-97 data in relation to present climate and environmental conditions |
publishDate |
2001 |
url |
https://research.ulapland.fi/fi/publications/72725874-cc67-4382-ae44-db159bc5ac2b http://arcticcentre.ulapland.fi/docs/jmoore/isakssonJG2001.pdf |
long_lat |
ENVELOPE(17.663,17.663,78.774,78.774) |
geographic |
Barents Sea Lomonosovfonna Longyearbyen Svalbard |
geographic_facet |
Barents Sea Lomonosovfonna Longyearbyen Svalbard |
genre |
Barents Sea ice core Journal of Glaciology Longyearbyen Sea ice Svalbard Spitsbergen |
genre_facet |
Barents Sea ice core Journal of Glaciology Longyearbyen Sea ice Svalbard Spitsbergen |
op_source |
Isaksson , E , Pohjola , V , Jauhiainen , T , Moore , J , Pinglot , J F , Vaikmäe , R , Van De Wal , R S W , Hagen , J O , Ivask , J , Karlöf , L , Martma , T , Meijer , H A J , Mulvaney , R , Thomassen , M & Van Den Broeke , M 2001 , ' A new ice-core record from Lomonosovfonna, Svalbard : Viewing the 1920-97 data in relation to present climate and environmental conditions ' , Journal of Glaciology , vol. 47 , no. 157 , pp. 335-345 . < http://arcticcentre.ulapland.fi/docs/jmoore/isakssonJG2001.pdf > |
op_relation |
https://research.ulapland.fi/fi/publications/72725874-cc67-4382-ae44-db159bc5ac2b |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1789330644868792320 |