Extremely high beryllium-7 surface concentrations in Europe: a case study
Authors
Ajtić, JelenaBrattich, Erika
Hernández-Ceballos, Miguel Angel
Sarvan, Darko
Djurdjević, Vladimir
Conference object (Published version)
Metadata
Show full item recordAbstract
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.
Keywords:
beryllium-7 / Be-7 / EuropeSource:
6th International Conference on Radiation and Applications in Various Fields of Research (RAD), Book of Abstracts, Jun 18-22, 2018, Ohrid, Macedonia, 2018, 169-169Publisher:
- Niš : RAD Association
Collections
Institution/Community
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 .