Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter
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2018
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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.
Ključne reči:
Beryllium-7 / Surface air / Meteorological parameters / Teleconnection indices / Multivariate analysis / Sudden stratospheric warmingIzvor:
Chemosphere, 2018, 199, 278-285Izdavač:
- Pergamon-Elsevier Science Ltd, Oxford
Finansiranje / projekti:
- Istraživanje klimatskih promena i njihovog uticaja na životnu sredinu - praćenje uticaja, adaptacija i ublažavanje (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-43007)
DOI: 10.1016/j.chemosphere.2018.02.052
ISSN: 0045-6535
PubMed: 29448195
WoS: 000428973200035
Scopus: 2-s2.0-85041833048
Kolekcije
Institucija/grupa
Fakultet veterinarske medicineTY - JOUR AU - Ajtić, Jelena AU - Brattich, Erika AU - Sarvan, Darko AU - Đurđević, V. AU - Hernández-Ceballos, Miguel A. PY - 2018 UR - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1649 AB - 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. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Chemosphere T1 - Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter VL - 199 SP - 278 EP - 285 DO - 10.1016/j.chemosphere.2018.02.052 ER -
@article{ author = "Ajtić, Jelena and Brattich, Erika and Sarvan, Darko and Đurđević, V. and Hernández-Ceballos, Miguel A.", year = "2018", abstract = "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.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Chemosphere", title = "Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter", volume = "199", pages = "278-285", doi = "10.1016/j.chemosphere.2018.02.052" }
Ajtić, J., Brattich, E., Sarvan, D., Đurđević, V.,& Hernández-Ceballos, M. A.. (2018). Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter. in Chemosphere Pergamon-Elsevier Science Ltd, Oxford., 199, 278-285. https://doi.org/10.1016/j.chemosphere.2018.02.052
Ajtić J, Brattich E, Sarvan D, Đurđević V, Hernández-Ceballos MA. Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter. in Chemosphere. 2018;199:278-285. doi:10.1016/j.chemosphere.2018.02.052 .
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" in Chemosphere, 199 (2018):278-285, https://doi.org/10.1016/j.chemosphere.2018.02.052 . .