Extremely high beryllium-7 surface concentrations in Europe: a case study
Аутори
Ajtić, JelenaBrattich, Erika
Hernández-Ceballos, Miguel Angel
Sarvan, Darko
Djurdjević, Vladimir
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Beryllium-7 is a cosmogenic radionuclide that, due to its maximum production in the stratosphere and upper troposphere, has often been used as a tracer of vertical transport processes in the atmosphere. In particular, high concentrations of surface airborne beryllium-7 could be a result of an uncommonly fast descent of air masses from the stratosphere into the troposphere. Hence, our aim is to investigate the maxima in the beryllium-7 surface concentrations to better understand the processes associated with the downward transport from the stratosphere to the troposphere. Fourteen locations in Europe, with latitudes ranging between 37 °N and 69 °N, and longitudes between 6 °W and 28 °E, are analysed in our study. Over the 2001–2010 period, the beryllium-7 surface concentration measurements in the chosen sites were performed mostly once a week, giving a total of about 500 data points per each site. The data are contained within the online Radioactivity Environmental Monitoring (REM) Data...base. We define the beryllium-7 maxima as values exceeding the 95th percentile calculated for each site. Over 2001–2010, 345 maxima are identified for the investigated 14 sites, out of which 61 maxima (18 %) occurred during three consecutive months: May, June and July 2006. Over this period, i.e. summer 2006, the contribution of detected maxima to the total number of maxima for each site ranged between 4 % and 32 %, with six sites showing a contribution of 20 % or larger. This number of extremely high beryllium-7 specific activities concentrated over only three months marks this period as unique. In an attempt to identify underlying mechanisms that are associated with this exceptional episode of high beryllium-7 surface concentrations, we look into the potential vorticity, surface temperature and pressure, and precipitation maps over the region of interest during the time window when the extremes were observed.
Кључне речи:
beryllium-7 / Be-7 / EuropeИзвор:
6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia, 2018, 169-169Издавач:
- Niš : RAD Association
Колекције
Институција/група
Fakultet veterinarske medicineTY - CONF AU - Ajtić, Jelena AU - Brattich, Erika AU - Hernández-Ceballos, Miguel Angel AU - Sarvan, Darko AU - Djurdjević, Vladimir PY - 2018 UR - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2347 AB - Beryllium-7 is a cosmogenic radionuclide that, due to its maximum production in the stratosphere and upper troposphere, has often been used as a tracer of vertical transport processes in the atmosphere. In particular, high concentrations of surface airborne beryllium-7 could be a result of an uncommonly fast descent of air masses from the stratosphere into the troposphere. Hence, our aim is to investigate the maxima in the beryllium-7 surface concentrations to better understand the processes associated with the downward transport from the stratosphere to the troposphere. Fourteen locations in Europe, with latitudes ranging between 37 °N and 69 °N, and longitudes between 6 °W and 28 °E, are analysed in our study. Over the 2001–2010 period, the beryllium-7 surface concentration measurements in the chosen sites were performed mostly once a week, giving a total of about 500 data points per each site. The data are contained within the online Radioactivity Environmental Monitoring (REM) Database. We define the beryllium-7 maxima as values exceeding the 95th percentile calculated for each site. Over 2001–2010, 345 maxima are identified for the investigated 14 sites, out of which 61 maxima (18 %) occurred during three consecutive months: May, June and July 2006. Over this period, i.e. summer 2006, the contribution of detected maxima to the total number of maxima for each site ranged between 4 % and 32 %, with six sites showing a contribution of 20 % or larger. This number of extremely high beryllium-7 specific activities concentrated over only three months marks this period as unique. In an attempt to identify underlying mechanisms that are associated with this exceptional episode of high beryllium-7 surface concentrations, we look into the potential vorticity, surface temperature and pressure, and precipitation maps over the region of interest during the time window when the extremes were observed. PB - Niš : RAD Association C3 - 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia T1 - Extremely high beryllium-7 surface concentrations in Europe: a case study SP - 169 EP - 169 UR - https://hdl.handle.net/21.15107/rcub_veterinar_2347 ER -
@conference{ author = "Ajtić, Jelena and Brattich, Erika and Hernández-Ceballos, Miguel Angel and Sarvan, Darko and Djurdjević, Vladimir", year = "2018", abstract = "Beryllium-7 is a cosmogenic radionuclide that, due to its maximum production in the stratosphere and upper troposphere, has often been used as a tracer of vertical transport processes in the atmosphere. In particular, high concentrations of surface airborne beryllium-7 could be a result of an uncommonly fast descent of air masses from the stratosphere into the troposphere. Hence, our aim is to investigate the maxima in the beryllium-7 surface concentrations to better understand the processes associated with the downward transport from the stratosphere to the troposphere. Fourteen locations in Europe, with latitudes ranging between 37 °N and 69 °N, and longitudes between 6 °W and 28 °E, are analysed in our study. Over the 2001–2010 period, the beryllium-7 surface concentration measurements in the chosen sites were performed mostly once a week, giving a total of about 500 data points per each site. The data are contained within the online Radioactivity Environmental Monitoring (REM) Database. We define the beryllium-7 maxima as values exceeding the 95th percentile calculated for each site. Over 2001–2010, 345 maxima are identified for the investigated 14 sites, out of which 61 maxima (18 %) occurred during three consecutive months: May, June and July 2006. Over this period, i.e. summer 2006, the contribution of detected maxima to the total number of maxima for each site ranged between 4 % and 32 %, with six sites showing a contribution of 20 % or larger. This number of extremely high beryllium-7 specific activities concentrated over only three months marks this period as unique. In an attempt to identify underlying mechanisms that are associated with this exceptional episode of high beryllium-7 surface concentrations, we look into the potential vorticity, surface temperature and pressure, and precipitation maps over the region of interest during the time window when the extremes were observed.", publisher = "Niš : RAD Association", journal = "6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia", title = "Extremely high beryllium-7 surface concentrations in Europe: a case study", pages = "169-169", url = "https://hdl.handle.net/21.15107/rcub_veterinar_2347" }
Ajtić, J., Brattich, E., Hernández-Ceballos, M. A., Sarvan, D.,& Djurdjević, V.. (2018). Extremely high beryllium-7 surface concentrations in Europe: a case study. in 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia Niš : RAD Association., 169-169. https://hdl.handle.net/21.15107/rcub_veterinar_2347
Ajtić J, Brattich E, Hernández-Ceballos MA, Sarvan D, Djurdjević V. Extremely high beryllium-7 surface concentrations in Europe: a case study. in 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia. 2018;:169-169. https://hdl.handle.net/21.15107/rcub_veterinar_2347 .
Ajtić, Jelena, Brattich, Erika, Hernández-Ceballos, Miguel Angel, Sarvan, Darko, Djurdjević, Vladimir, "Extremely high beryllium-7 surface concentrations in Europe: a case study" in 6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia (2018):169-169, https://hdl.handle.net/21.15107/rcub_veterinar_2347 .