Морской гидрофизический журнал. 2022; 38: 345-357
Временная изменчивость скорости вымывания аэрозолей в Севастопольском регионе: натурные наблюдения
https://doi.org/10.22449/0233-7584-2022-4-345-357Аннотация
Цель. Выявление особенностей сезонной и межгодовой изменчивости скорости вымывания аэрозолей и выделение факторов, определяющих эту изменчивость на исследуемых масштабах времени, – цель настоящего исследования.
Методы и результаты. Оценки скорости вымывания в период 2012–2020 гг. были проведены по натурным данным о временной изменчивости концентрации 7Ве на атмосферных аэрозолях и потоке 7Ве с «влажными» атмосферными выпадениями. С использованием корреляционного анализа получены оценки влияния количества и частоты выпадения осадков на сезонную и межгодовую изменчивость скорости вымывания. Множественный регрессионный анализ был использован для построения моделей регрессии.
Выводы. Скорость вымывания изменяется в пределах 0,21–1,40 см·с–1 и составляет в среднем 0,62 ± 0,29 см·с–1. Установлено, что ее сезонная изменчивость определяется количеством и частотой выпадения осадков. Межгодовая изменчивость скорости вымывания определяется только количеством выпавших осадков. По результатам исследований предложено две регрессионные модели. Одна модель позволяет описать сезонную изменчивость скорости вымывания, другая – межгодовую изменчивость этого параметра. В обеих моделях используются соответствующие временные ряды данных об изменчивости количества выпавших осадков в качестве предикторов. Результаты валидации показывают, что погрешности получаемых оценок составляют 21,1 и 12,9% для сезонных и годовых величин скорости вымывания соответственно.
Список литературы
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Morskoy Gidrofizicheskiy Zhurnal. 2022; 38: 345-357
Temporal Variability of Aerosol Wet Deposition Velocity in the Sevastopol Region: Observational Data
https://doi.org/10.22449/0233-7584-2022-4-345-357Abstract
Purpose. The study is purposed at identifying both the features of seasonal and interannual variability of the aerosol wet deposition velocity and the factors that determine this variability on the time scales under study.
Methods and Results. The deposition velocity in 2012–2020 was estimated using the field data on temporal variability of the 7Be concentration on atmospheric aerosols and the 7Be “wet” deposition fluxes. The correlation analysis permitted to assess quantitatively the influence of the precipitation amount and frequency upon the seasonal and interannual variability of the deposition velocity. The multiple regression analysis was applied for constructing the regression models.
Conclusions. The deposition velocity varies from 0.21 to 1.40 cm·s–1 and averages 0.62 ± 0.29 cm s–1. It has been established that its seasonal variability is conditioned by the amount and frequency of precipitation, whereas its interannual variability – by the precipitation amount only. Based on the obtained results, two regression models were proposed. The first model describes seasonal variability of the deposition velocity, while the second one – the interannual variability of this parameter. The corresponding time series of precipitation variability data are used in both models as predictors. The validation results indicate that the errors in the obtained estimates constitute 21.1 and 12.9% for the seasonal and annual values of wet deposition velocity, respectively.
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19. 7Be spatial and temporal pattern in southwest of Europe (Spain): Evaluation of a predictive model / E. Chham [et al.] // Chemosphere. 2018. Vol. 205. P. 194–202. https://doi.org/10.1016/j.chemosphere.2018.04.099
20. Meteorological Factors Controlling 7Be Activity Concentrations in the Atmospheric Surface Layer in Northern Spain / N. Alegria [et al.] // Atmosphere. 2020. Vol. 11, iss. 12. 1340. https://doi.org/10.3390/atmos11121340
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26. Analysis of the influence of solar activity and atmospheric factors on 7Be air concentration by seasonal-trend decomposition / M. C. Bas [et al.] // Atmospheric Environment. 2016. Vol. 145. P. 147–157. https://doi.org/10.1016/j.atmosenv.2016.09.027
27. Pinero-García F., Ferro-García M. A. Evolution and solar modulation of 7Be during the solar cycle 23 // Journal of Radioanalytical and Nuclear Chemistry. 2013. Vol. 296. P. 1193–1204. https://doi.org/10.1007/s10967-012-2373-y
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29. Doering C., Akber R. Beryllium-7 in near-surface air and deposition at Brisbane, Australia // Journal of Environmental Radioactivity. 2008. Vol. 99, iss. 3. P. 461–467. https://doi.org/10.1016/j.jenvrad.2007.08.017
30. Depositional fluxes and concentrations of 7Be and 210Pb in bulk precipitation and aerosols at the interface of Atlantic and Mediterranean coasts in Spain / R. L. Lozano [et al.] // Journal of Geophysical Research. Atmospheres. 2011. Vol. 116, iss. D18. D18213. https://doi.org
