статья в журнале

En

Physical Oceanography

ISSN:1573160

2024

Purpose. The study is purposed at identifying the features of temporal variability in the relation of 7Ве scavenging ratio at the seasonal and interannual time intervals depending on the amount and frequency of precipitation. Methods and Results. The scavenging ratio was assessed based on the field data on the 7Ве concentration values in the atmosphere and precipitation in 2012–2020. Application of ANOVA made it possible to examine the relationship between the scavenging ratio and the variations in 7Be concentrations in the atmosphere and precipitation. The relationship between the scavenging ratio and the precipitation amount and frequency was studied by the correlation method of analysis. Conclusions. The scavenging ratio values averaged over a season and a year varied within the ranges 423–1286 and 508–919, respectively. The geometric mean value of the scavenging ratio was 719+227-173. The intraannual variability of the scavenging ratio is absent at the 95% confidence level. The variability in average annual values of the scavenging ratio demonstrates a decrease in 2013 (as compared to 2012) from 664 to 508, an increase to 919 in 2016 and again a decrease to 516 in 2020. The ANOVA results indicate that variability of the scavenging ratio values averaged over a season and a year is due to the variation in 7Ве concentration in precipitation by 90 and 74%, respectively. In its turn, the long-term seasonal variability of 7Ве concentration in precipitation is conditioned by the variations in 7Ве concentration in the atmosphere (r = 0.64) and in the precipitation amount (r = −0.50). The relationship between the annual values of 7Ве concentration in precipitation and its concentration in the atmosphere or with the precipitation parameters has not been revealed. The correlation analysis results indicate that the variability of precipitation parameters (amount and frequency) produces no statistically significant effect at the 95% confidence level upon the variability of scavenging ratio values at seasonal and annual time intervals. © 2024, D. A. Kremenchutskii and 2024, Physical Oceanography.

atmospheric aerosol, Beryllium-7 (7Be), precipitation, scavenging ratio

2024-08-02 11:53:52