Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard
[1] We examine the quality of atmospherically deposited ion and isotope signals in an ice core taken from a periodically melting ice field, Lomonosovfonna in central Spitsbergen, Svalbard. The aim is to determine the degree to which the signals are altered by periodic melting of the ice. We use thre...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2002
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Online Access: | https://hdl.handle.net/11370/0bfb2568-bf14-47c0-a277-19837f1e9a6d https://research.rug.nl/en/publications/0bfb2568-bf14-47c0-a277-19837f1e9a6d https://doi.org/10.1029/2000JD000149 https://pure.rug.nl/ws/files/67092159/Pohjola_et_al_2002_Journal_of_Geophysical_Research_3A_Atmospheres_281984_2012_29.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/0bfb2568-bf14-47c0-a277-19837f1e9a6d 2024-09-15T18:10:02+00:00 Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard Pohjola, V. A. Moore, J. C. Isaksson, E. Jauhiainen, T. van de Wal, R. S. W. Martma, T. Meijer, H. A. J. Vaikmäe, R. 2002-02-27 application/pdf https://hdl.handle.net/11370/0bfb2568-bf14-47c0-a277-19837f1e9a6d https://research.rug.nl/en/publications/0bfb2568-bf14-47c0-a277-19837f1e9a6d https://doi.org/10.1029/2000JD000149 https://pure.rug.nl/ws/files/67092159/Pohjola_et_al_2002_Journal_of_Geophysical_Research_3A_Atmospheres_281984_2012_29.pdf eng eng https://research.rug.nl/en/publications/0bfb2568-bf14-47c0-a277-19837f1e9a6d info:eu-repo/semantics/openAccess Pohjola , V A , Moore , J C , Isaksson , E , Jauhiainen , T , van de Wal , R S W , Martma , T , Meijer , H A J & Vaikmäe , R 2002 , ' Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard ' , Journal of geophysical research-Atmospheres , vol. 107 , no. D4 , 4036 . https://doi.org/10.1029/2000JD000149 ice cores snowmelt water isotopes ice chemistry percolation in firn CLIMATIC RECONSTRUCTIONS GREENLAND SNOW CAP SPITSBERGEN AEROSOL ISLAND RECORD LAYER AREAS article 2002 ftunigroningenpu https://doi.org/10.1029/2000JD000149 2024-06-24T15:36:28Z [1] We examine the quality of atmospherically deposited ion and isotope signals in an ice core taken from a periodically melting ice field, Lomonosovfonna in central Spitsbergen, Svalbard. The aim is to determine the degree to which the signals are altered by periodic melting of the ice. We use three diagnostics: (1) the relation between peak values in the ice chemical and isotopic record and ice facies type, (2) the number of apparent annual cycles in these records compared with independently determined number of years represented in the ice core, and (3) a statistical comparison of the isotopic record in the ice core and the isotope records from coastal stations from the same region. We find that during warm summers, as much as 50% of the annual accumulation may melt and percolate into the firn; in a median year this decreases to similar to25%. As a consequence of percolation, the most mobile acids show up to 50% higher concentrations in bubble-poor ice facies compared with facies that are less affected by melt. Most of the other chemical species are less affected than the strong acids, and the stable water isotopes show little evidence of mobility. Annual or biannual cycles are detected in most parameters, and the water isotope record has a comparable statistical distribution to isotopic records from coastal stations. We conclude that ice cores from sites like Lomonosovfonna contain a useful environmental record, despite melt events and percolation and that most parameters preserve an annual, or in the worst cases, a biannual atmospheric signal. Article in Journal/Newspaper Greenland ice core Svalbard Spitsbergen University of Groningen research database Journal of Geophysical Research 107 D4 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
ice cores snowmelt water isotopes ice chemistry percolation in firn CLIMATIC RECONSTRUCTIONS GREENLAND SNOW CAP SPITSBERGEN AEROSOL ISLAND RECORD LAYER AREAS |
spellingShingle |
ice cores snowmelt water isotopes ice chemistry percolation in firn CLIMATIC RECONSTRUCTIONS GREENLAND SNOW CAP SPITSBERGEN AEROSOL ISLAND RECORD LAYER AREAS Pohjola, V. A. Moore, J. C. Isaksson, E. Jauhiainen, T. van de Wal, R. S. W. Martma, T. Meijer, H. A. J. Vaikmäe, R. Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard |
topic_facet |
ice cores snowmelt water isotopes ice chemistry percolation in firn CLIMATIC RECONSTRUCTIONS GREENLAND SNOW CAP SPITSBERGEN AEROSOL ISLAND RECORD LAYER AREAS |
description |
[1] We examine the quality of atmospherically deposited ion and isotope signals in an ice core taken from a periodically melting ice field, Lomonosovfonna in central Spitsbergen, Svalbard. The aim is to determine the degree to which the signals are altered by periodic melting of the ice. We use three diagnostics: (1) the relation between peak values in the ice chemical and isotopic record and ice facies type, (2) the number of apparent annual cycles in these records compared with independently determined number of years represented in the ice core, and (3) a statistical comparison of the isotopic record in the ice core and the isotope records from coastal stations from the same region. We find that during warm summers, as much as 50% of the annual accumulation may melt and percolate into the firn; in a median year this decreases to similar to25%. As a consequence of percolation, the most mobile acids show up to 50% higher concentrations in bubble-poor ice facies compared with facies that are less affected by melt. Most of the other chemical species are less affected than the strong acids, and the stable water isotopes show little evidence of mobility. Annual or biannual cycles are detected in most parameters, and the water isotope record has a comparable statistical distribution to isotopic records from coastal stations. We conclude that ice cores from sites like Lomonosovfonna contain a useful environmental record, despite melt events and percolation and that most parameters preserve an annual, or in the worst cases, a biannual atmospheric signal. |
format |
Article in Journal/Newspaper |
author |
Pohjola, V. A. Moore, J. C. Isaksson, E. Jauhiainen, T. van de Wal, R. S. W. Martma, T. Meijer, H. A. J. Vaikmäe, R. |
author_facet |
Pohjola, V. A. Moore, J. C. Isaksson, E. Jauhiainen, T. van de Wal, R. S. W. Martma, T. Meijer, H. A. J. Vaikmäe, R. |
author_sort |
Pohjola, V. A. |
title |
Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard |
title_short |
Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard |
title_full |
Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard |
title_fullStr |
Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard |
title_full_unstemmed |
Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard |
title_sort |
effect of periodic melting on geochemical and isotopic signals in an ice core from lomonosovfonna, svalbard |
publishDate |
2002 |
url |
https://hdl.handle.net/11370/0bfb2568-bf14-47c0-a277-19837f1e9a6d https://research.rug.nl/en/publications/0bfb2568-bf14-47c0-a277-19837f1e9a6d https://doi.org/10.1029/2000JD000149 https://pure.rug.nl/ws/files/67092159/Pohjola_et_al_2002_Journal_of_Geophysical_Research_3A_Atmospheres_281984_2012_29.pdf |
genre |
Greenland ice core Svalbard Spitsbergen |
genre_facet |
Greenland ice core Svalbard Spitsbergen |
op_source |
Pohjola , V A , Moore , J C , Isaksson , E , Jauhiainen , T , van de Wal , R S W , Martma , T , Meijer , H A J & Vaikmäe , R 2002 , ' Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard ' , Journal of geophysical research-Atmospheres , vol. 107 , no. D4 , 4036 . https://doi.org/10.1029/2000JD000149 |
op_relation |
https://research.rug.nl/en/publications/0bfb2568-bf14-47c0-a277-19837f1e9a6d |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2000JD000149 |
container_title |
Journal of Geophysical Research |
container_volume |
107 |
container_issue |
D4 |
_version_ |
1810447628293373952 |