Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter
Relationships between the beryllium-7 activity concentrations in surface air and meteorological parameters (temperature, atmospheric pressure, and precipitation), teleconnection indices (Arctic Oscillation, North Atlantic Oscillation, and Scandinavian pattern) and number of sunspots are investigated...
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Pergamon-Elsevier Science Ltd, Oxford
2018
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Online Access: | https://vet-erinar.vet.bg.ac.rs/handle/123456789/1649 https://doi.org/10.1016/j.chemosphere.2018.02.052 |
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ftunivbelgradfvm:oai:vet-erinar.vet.bg.ac.rs:123456789/1649 2023-05-15T15:00:59+02:00 Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter Ajtić, Jelena Brattich, Erika Sarvan, Darko Đurđević, V. Hernández-Ceballos, Miguel A. 2018 https://vet-erinar.vet.bg.ac.rs/handle/123456789/1649 https://doi.org/10.1016/j.chemosphere.2018.02.052 unknown Pergamon-Elsevier Science Ltd, Oxford info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43007/RS// 0045-6535 https://vet-erinar.vet.bg.ac.rs/handle/123456789/1649 000428973200035 doi:10.1016/j.chemosphere.2018.02.052 29448195 2-s2.0-85041833048 restrictedAccess ARR Chemosphere Beryllium-7 Surface air Meteorological parameters Teleconnection indices Multivariate analysis Sudden stratospheric warming article publishedVersion 2018 ftunivbelgradfvm https://doi.org/10.1016/j.chemosphere.2018.02.052 2023-04-12T10:12:36Z Relationships between the beryllium-7 activity concentrations in surface air and meteorological parameters (temperature, atmospheric pressure, and precipitation), teleconnection indices (Arctic Oscillation, North Atlantic Oscillation, and Scandinavian pattern) and number of sunspots are investigated using two multivariate statistical techniques: hierarchical cluster and factor analysis. The beryllium-7 surface measurements over 1995-2011, at four sampling sites located in the Scandinavian Peninsula, are obtained from the Radioactivity Environmental Monitoring Database. In all sites, the statistical analyses show that the beryllium-7 concentrations are strongly linked to temperature. Although the beryllium-7 surface concentration exhibits the well-characterised spring/summer maximum, our study shows that extremely high beryllium-7 concentrations, defined as the values exceeding the 90th percentile in the data records for each site, also occur over the October-March period. Two types of autumn/winter extremes are distinguished: type-1 when the number of extremes in a given month is less than three, and type-2 when at least three extremes occur in a month. Factor analysis performed for these autumn/winter events shows a weaker effect of temperature and a stronger impact of the transport and production signal on the beryllium-7 concentrations. Further, the majority of the type-2 extremes are associated with a very high monthly Scandinavian teleconnection index. The type-2 extremes that occurred in January, February and March are also linked to sudden stratospheric warmings of the Arctic vortex. Our results indicate that the Scandinavian teleconnection index might be a good indicator of the meteorological conditions facilitating extremely high beryllium-7 surface concentrations over Scandinavia during autumn and winter. Article in Journal/Newspaper Arctic North Atlantic North Atlantic oscillation Veterinar - Repository of the Faculty of Veterinary Medicine, University of Belgrade Arctic Chemosphere 199 278 285 |
institution |
Open Polar |
collection |
Veterinar - Repository of the Faculty of Veterinary Medicine, University of Belgrade |
op_collection_id |
ftunivbelgradfvm |
language |
unknown |
topic |
Beryllium-7 Surface air Meteorological parameters Teleconnection indices Multivariate analysis Sudden stratospheric warming |
spellingShingle |
Beryllium-7 Surface air Meteorological parameters Teleconnection indices Multivariate analysis Sudden stratospheric warming Ajtić, Jelena Brattich, Erika Sarvan, Darko Đurđević, V. Hernández-Ceballos, Miguel A. Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter |
topic_facet |
Beryllium-7 Surface air Meteorological parameters Teleconnection indices Multivariate analysis Sudden stratospheric warming |
description |
Relationships between the beryllium-7 activity concentrations in surface air and meteorological parameters (temperature, atmospheric pressure, and precipitation), teleconnection indices (Arctic Oscillation, North Atlantic Oscillation, and Scandinavian pattern) and number of sunspots are investigated using two multivariate statistical techniques: hierarchical cluster and factor analysis. The beryllium-7 surface measurements over 1995-2011, at four sampling sites located in the Scandinavian Peninsula, are obtained from the Radioactivity Environmental Monitoring Database. In all sites, the statistical analyses show that the beryllium-7 concentrations are strongly linked to temperature. Although the beryllium-7 surface concentration exhibits the well-characterised spring/summer maximum, our study shows that extremely high beryllium-7 concentrations, defined as the values exceeding the 90th percentile in the data records for each site, also occur over the October-March period. Two types of autumn/winter extremes are distinguished: type-1 when the number of extremes in a given month is less than three, and type-2 when at least three extremes occur in a month. Factor analysis performed for these autumn/winter events shows a weaker effect of temperature and a stronger impact of the transport and production signal on the beryllium-7 concentrations. Further, the majority of the type-2 extremes are associated with a very high monthly Scandinavian teleconnection index. The type-2 extremes that occurred in January, February and March are also linked to sudden stratospheric warmings of the Arctic vortex. Our results indicate that the Scandinavian teleconnection index might be a good indicator of the meteorological conditions facilitating extremely high beryllium-7 surface concentrations over Scandinavia during autumn and winter. |
format |
Article in Journal/Newspaper |
author |
Ajtić, Jelena Brattich, Erika Sarvan, Darko Đurđević, V. Hernández-Ceballos, Miguel A. |
author_facet |
Ajtić, Jelena Brattich, Erika Sarvan, Darko Đurđević, V. Hernández-Ceballos, Miguel A. |
author_sort |
Ajtić, Jelena |
title |
Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter |
title_short |
Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter |
title_full |
Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter |
title_fullStr |
Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter |
title_full_unstemmed |
Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter |
title_sort |
factors affecting the be-7 surface concentration and its extremely high occurrences over the scandinavian peninsula during autumn and winter |
publisher |
Pergamon-Elsevier Science Ltd, Oxford |
publishDate |
2018 |
url |
https://vet-erinar.vet.bg.ac.rs/handle/123456789/1649 https://doi.org/10.1016/j.chemosphere.2018.02.052 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic North Atlantic oscillation |
genre_facet |
Arctic North Atlantic North Atlantic oscillation |
op_source |
Chemosphere |
op_relation |
info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43007/RS// 0045-6535 https://vet-erinar.vet.bg.ac.rs/handle/123456789/1649 000428973200035 doi:10.1016/j.chemosphere.2018.02.052 29448195 2-s2.0-85041833048 |
op_rights |
restrictedAccess ARR |
op_doi |
https://doi.org/10.1016/j.chemosphere.2018.02.052 |
container_title |
Chemosphere |
container_volume |
199 |
container_start_page |
278 |
op_container_end_page |
285 |
_version_ |
1766333039322857472 |