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Long-patch Base Excision Repair

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Long term 7Be deposition in Romania.

C Dovlete1, S Sonoc1, I Osvath1

  • 1Environmental Radioactivity Laboratory, Bucharest-Afumati, 72400, Romania.

Journal of Environmental Radioactivity
|September 23, 2021
PubMed
Summary

Monthly beryllium-7 (⁷Be) deposition in Romania closely follows precipitation patterns, peaking in spring/summer. This study analyzed 17 years of data, revealing significant variations influenced by weather and solar activity.

Keywords:
(7)BeAtmospheric depositionDry depositionLow-background gamma-ray spectroscopyWet deposition

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Area of Science:

  • Environmental Science
  • Radiochemistry
  • Atmospheric Physics

Background:

  • Beryllium-7 (⁷Be) is a cosmogenic radionuclide used as a tracer for atmospheric processes.
  • Understanding ⁷Be deposition is crucial for environmental radioactivity monitoring.
  • Romania's National Environmental Radioactivity Surveillance Network (NERSN) provides extensive data for such studies.

Purpose of the Study:

  • To analyze the spatio-temporal variability of ⁷Be atmospheric deposition in Romania.
  • To investigate the correlation between ⁷Be deposition and meteorological factors.
  • To assess the influence of solar activity on ⁷Be deposition.

Main Methods:

  • Monthly ⁷Be deposition data from 29 NERSN stations (1979-1995) were analyzed.
  • High-resolution gamma-ray spectrometry was used to measure ⁷Be activity.
  • Statistical analysis was employed to correlate deposition data with precipitation, temperature, and sunspot numbers.

Main Results:

  • ⁷Be deposition exhibited a strong seasonal trend, mirroring precipitation patterns (highest in spring/summer, lowest in winter).
  • Annual deposition fluxes varied significantly across stations and years, ranging from 164 to 1388 Bq/m²/y.
  • A strong positive correlation was confirmed between ⁷Be deposition and precipitation, air temperature, and sunspot numbers.

Conclusions:

  • Precipitation regime is the primary driver of ⁷Be deposition variability in Romania.
  • Meteorological factors and solar activity play significant roles in modulating ⁷Be atmospheric transport and deposition.
  • The study highlights the utility of ⁷Be as a tracer for atmospheric dynamics and deposition processes.