Beryllium-7 activity concentration trends in Serbia and Slovenia
2022
Authors
Bianchi, StefanoPlastino, Wolfango
Rajačić, Milica
Krneta Nikolić, Jelena
Todorović, Dragana
Zorko, Benjamin
Nečemer, Marijan
Vodenik, Branko
Glavič Cindro, Denis
Kožar Logar, Jasmina
Sarvan, Darko
Đurđević, Vladimir
Ajtić, Jelena
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Beryllium-7 is a natural radionuclide used as a tracer of the stratospheric-tropospheric exchange. Its abundance in the surface air is expected to change as the temperatures in the atmosphere increase.
To investigate the temporal trends of the beryllium-7 activity concentrations and temperature, we apply spectral analysis to time series from three sampling sites: Belgrade in Serbia, and Ljubljana and Krško in Slovenia. The sites lie close to the 45 ºN parallel, with Krško approximately 400 km and Ljubljana around 500 km west of Belgrade. Between January 1991 and December 2019, the air filter samples were collected using air samplers; a monthly composite sample was formed and analysed by gamma spectrometry. We use monthly mean temperature records from the European Climate Assessment & Dataset, the Republic Hydrometeorological Service of Serbia for Belgrade, and the Slovenian Environment Agency for the sites in Slovenia.
In the spectral analysis decomposition, we look into a term calle...d trend that represents the overall growth (increase or decrease) in the data records. The trend is calculated using a linear fit. All three sites show 1) positive temperature trends, however statistically insignificant (at the 95 % confidence level), and 2) statistically significant beryllium-7 activity concentration trends of 2.26 %/year, 1.13 %/year, and 0.50 %/year in Belgrade, Ljubljana, and Krško, respectively.
The results confirm our initial hypothesis–over the 28 investigated years, the beryllium-7 activity concentrations increase in the surface air. On the other hand, the non-significant temperature rise in our records suggests that within our method, the temporal resolution of one month is insufficient for obtaining a statistically significant temperature trend.
Keywords:
Beryllium-7 / Belgrade / Ljubljana / Krško / surface airSource:
International conference on radiation applications (RAP 2022), 2022, 45-Publisher:
- Niš : Sievert Association
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Fakultet veterinarske medicineTY - CONF AU - Bianchi, Stefano AU - Plastino, Wolfango AU - Rajačić, Milica AU - Krneta Nikolić, Jelena AU - Todorović, Dragana AU - Zorko, Benjamin AU - Nečemer, Marijan AU - Vodenik, Branko AU - Glavič Cindro, Denis AU - Kožar Logar, Jasmina AU - Sarvan, Darko AU - Đurđević, Vladimir AU - Ajtić, Jelena PY - 2022 UR - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2479 AB - Beryllium-7 is a natural radionuclide used as a tracer of the stratospheric-tropospheric exchange. Its abundance in the surface air is expected to change as the temperatures in the atmosphere increase. To investigate the temporal trends of the beryllium-7 activity concentrations and temperature, we apply spectral analysis to time series from three sampling sites: Belgrade in Serbia, and Ljubljana and Krško in Slovenia. The sites lie close to the 45 ºN parallel, with Krško approximately 400 km and Ljubljana around 500 km west of Belgrade. Between January 1991 and December 2019, the air filter samples were collected using air samplers; a monthly composite sample was formed and analysed by gamma spectrometry. We use monthly mean temperature records from the European Climate Assessment & Dataset, the Republic Hydrometeorological Service of Serbia for Belgrade, and the Slovenian Environment Agency for the sites in Slovenia. In the spectral analysis decomposition, we look into a term called trend that represents the overall growth (increase or decrease) in the data records. The trend is calculated using a linear fit. All three sites show 1) positive temperature trends, however statistically insignificant (at the 95 % confidence level), and 2) statistically significant beryllium-7 activity concentration trends of 2.26 %/year, 1.13 %/year, and 0.50 %/year in Belgrade, Ljubljana, and Krško, respectively. The results confirm our initial hypothesis–over the 28 investigated years, the beryllium-7 activity concentrations increase in the surface air. On the other hand, the non-significant temperature rise in our records suggests that within our method, the temporal resolution of one month is insufficient for obtaining a statistically significant temperature trend. PB - Niš : Sievert Association C3 - International conference on radiation applications (RAP 2022) T1 - Beryllium-7 activity concentration trends in Serbia and Slovenia SP - 45 UR - https://hdl.handle.net/21.15107/rcub_veterinar_2479 ER -
@conference{ author = "Bianchi, Stefano and Plastino, Wolfango and Rajačić, Milica and Krneta Nikolić, Jelena and Todorović, Dragana and Zorko, Benjamin and Nečemer, Marijan and Vodenik, Branko and Glavič Cindro, Denis and Kožar Logar, Jasmina and Sarvan, Darko and Đurđević, Vladimir and Ajtić, Jelena", year = "2022", abstract = "Beryllium-7 is a natural radionuclide used as a tracer of the stratospheric-tropospheric exchange. Its abundance in the surface air is expected to change as the temperatures in the atmosphere increase. To investigate the temporal trends of the beryllium-7 activity concentrations and temperature, we apply spectral analysis to time series from three sampling sites: Belgrade in Serbia, and Ljubljana and Krško in Slovenia. The sites lie close to the 45 ºN parallel, with Krško approximately 400 km and Ljubljana around 500 km west of Belgrade. Between January 1991 and December 2019, the air filter samples were collected using air samplers; a monthly composite sample was formed and analysed by gamma spectrometry. We use monthly mean temperature records from the European Climate Assessment & Dataset, the Republic Hydrometeorological Service of Serbia for Belgrade, and the Slovenian Environment Agency for the sites in Slovenia. In the spectral analysis decomposition, we look into a term called trend that represents the overall growth (increase or decrease) in the data records. The trend is calculated using a linear fit. All three sites show 1) positive temperature trends, however statistically insignificant (at the 95 % confidence level), and 2) statistically significant beryllium-7 activity concentration trends of 2.26 %/year, 1.13 %/year, and 0.50 %/year in Belgrade, Ljubljana, and Krško, respectively. The results confirm our initial hypothesis–over the 28 investigated years, the beryllium-7 activity concentrations increase in the surface air. On the other hand, the non-significant temperature rise in our records suggests that within our method, the temporal resolution of one month is insufficient for obtaining a statistically significant temperature trend.", publisher = "Niš : Sievert Association", journal = "International conference on radiation applications (RAP 2022)", title = "Beryllium-7 activity concentration trends in Serbia and Slovenia", pages = "45", url = "https://hdl.handle.net/21.15107/rcub_veterinar_2479" }
Bianchi, S., Plastino, W., Rajačić, M., Krneta Nikolić, J., Todorović, D., Zorko, B., Nečemer, M., Vodenik, B., Glavič Cindro, D., Kožar Logar, J., Sarvan, D., Đurđević, V.,& Ajtić, J.. (2022). Beryllium-7 activity concentration trends in Serbia and Slovenia. in International conference on radiation applications (RAP 2022) Niš : Sievert Association., 45. https://hdl.handle.net/21.15107/rcub_veterinar_2479
Bianchi S, Plastino W, Rajačić M, Krneta Nikolić J, Todorović D, Zorko B, Nečemer M, Vodenik B, Glavič Cindro D, Kožar Logar J, Sarvan D, Đurđević V, Ajtić J. Beryllium-7 activity concentration trends in Serbia and Slovenia. in International conference on radiation applications (RAP 2022). 2022;:45. https://hdl.handle.net/21.15107/rcub_veterinar_2479 .
Bianchi, Stefano, Plastino, Wolfango, Rajačić, Milica, Krneta Nikolić, Jelena, Todorović, Dragana, Zorko, Benjamin, Nečemer, Marijan, Vodenik, Branko, Glavič Cindro, Denis, Kožar Logar, Jasmina, Sarvan, Darko, Đurđević, Vladimir, Ajtić, Jelena, "Beryllium-7 activity concentration trends in Serbia and Slovenia" in International conference on radiation applications (RAP 2022) (2022):45, https://hdl.handle.net/21.15107/rcub_veterinar_2479 .