Atmospheric interactions at northern high latitudes from weekly Be-isotopes in surface air

A. Aldahan, G. Possnert, I. Vintersved

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

We present weekly 7Be (from 1972 to 1995), and weekly/seasonal 10Be (for 1994) data in surface air from ground level stations in Sweden with a coverage of most of the northern high latitudes (56°-68°N). Our Be data are regionally representative and reveal seasonal variation and coupling with tropospheric air mass from middle-low latitudes. The Be data also suggests a few percent, and sometimes episodic, incursion of stratospheric air mass. Frequent precipitation depletes the Be isotopes in the air, but cyclone events contribute to enrichments. A strong coherence between the 7Be record and short-term (monthly-seasonal) change in solar activity is observed which introduces a new mechanism for driving the amplitude of seasonal variation. Copyright (C) 2001 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)345-353
Number of pages9
JournalApplied Radiation and Isotopes
Volume54
Issue number2
DOIs
Publication statusPublished - Feb 2001
Externally publishedYes

Keywords

  • Atmosphere
  • Be-isotopes
  • Cs-137
  • Solar activity
  • Sweden

ASJC Scopus subject areas

  • Radiation

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