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Solar and meteorological influences on seasonal atmospheric 7Be in Europe for 1975 to 2018

Zheng, Minjie LU ; Sjolte, Jesper LU orcid ; Adolphi, Florian LU ; Aldahan, Ala ; Possnert, Göran ; Wu, Mousong and Muscheler, Raimund LU orcid (2021) In Chemosphere 263.
Abstract

Assessing the transport of natural radionuclides in the atmosphere provides a powerful tool to study air mass circulation. Here, we investigated the seasonal atmospheric distribution of the naturally produced 7Be in surface air over Europe between 40° N and 68° N during the period 1975–2018. The results suggest that the inter-annual variability of 7Be reflects production rates of the radionuclide induced by solar modulation of cosmic rays. Further analysis of the meteorological influences indicates that the meteorological influences on 7Be concentrations are geographically and seasonally dependent. We found that, in general, the tropopause pressure plays an important factor influencing 7Be... (More)

Assessing the transport of natural radionuclides in the atmosphere provides a powerful tool to study air mass circulation. Here, we investigated the seasonal atmospheric distribution of the naturally produced 7Be in surface air over Europe between 40° N and 68° N during the period 1975–2018. The results suggest that the inter-annual variability of 7Be reflects production rates of the radionuclide induced by solar modulation of cosmic rays. Further analysis of the meteorological influences indicates that the meteorological influences on 7Be concentrations are geographically and seasonally dependent. We found that, in general, the tropopause pressure plays an important factor influencing 7Be activity for winter and spring seasons while the sea level pressure and temperature are more dominant during summer and autumn seasons. The combination of tropospheric production rates and meteorological parameters explains 24%–79% variances of the seasonal 7Be activity. We further applied a three-box model to study the influence of stratosphere-troposphere exchanges on 7Be concentrations. The simulation supports that the seasonal cycle of 7Be in Europe is controlled by two main factors: the changing height of the troposphere (seasonality of the tropopause height) and seasonal variations of the stratosphere-troposphere exchanges.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Beryllium-7, Meteorological influences, Solar modulation, Stepwise regression, Stratospheric intrusion, Three-box model
in
Chemosphere
volume
263
article number
128318
publisher
Elsevier
external identifiers
  • scopus:85091213605
  • pmid:33297251
ISSN
0045-6535
DOI
10.1016/j.chemosphere.2020.128318
language
English
LU publication?
yes
id
55c609b4-3f0a-4915-a65a-4383a15d4062
date added to LUP
2020-10-21 16:58:50
date last changed
2024-08-08 02:43:59
@article{55c609b4-3f0a-4915-a65a-4383a15d4062,
  abstract     = {{<p>Assessing the transport of natural radionuclides in the atmosphere provides a powerful tool to study air mass circulation. Here, we investigated the seasonal atmospheric distribution of the naturally produced <sup>7</sup>Be in surface air over Europe between 40° N and 68° N during the period 1975–2018. The results suggest that the inter-annual variability of <sup>7</sup>Be reflects production rates of the radionuclide induced by solar modulation of cosmic rays. Further analysis of the meteorological influences indicates that the meteorological influences on <sup>7</sup>Be concentrations are geographically and seasonally dependent. We found that, in general, the tropopause pressure plays an important factor influencing <sup>7</sup>Be activity for winter and spring seasons while the sea level pressure and temperature are more dominant during summer and autumn seasons. The combination of tropospheric production rates and meteorological parameters explains 24%–79% variances of the seasonal <sup>7</sup>Be activity. We further applied a three-box model to study the influence of stratosphere-troposphere exchanges on <sup>7</sup>Be concentrations. The simulation supports that the seasonal cycle of <sup>7</sup>Be in Europe is controlled by two main factors: the changing height of the troposphere (seasonality of the tropopause height) and seasonal variations of the stratosphere-troposphere exchanges.</p>}},
  author       = {{Zheng, Minjie and Sjolte, Jesper and Adolphi, Florian and Aldahan, Ala and Possnert, Göran and Wu, Mousong and Muscheler, Raimund}},
  issn         = {{0045-6535}},
  keywords     = {{Beryllium-7; Meteorological influences; Solar modulation; Stepwise regression; Stratospheric intrusion; Three-box model}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Chemosphere}},
  title        = {{Solar and meteorological influences on seasonal atmospheric <sup>7</sup>Be in Europe for 1975 to 2018}},
  url          = {{http://dx.doi.org/10.1016/j.chemosphere.2020.128318}},
  doi          = {{10.1016/j.chemosphere.2020.128318}},
  volume       = {{263}},
  year         = {{2021}},
}