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

被引：53

作者：

Aldahan, A ^{[1
]}

Possnert, G

Vintersved, I

机构：

[1] Uppsala Univ, Inst Earth Sci, Uppsala, Sweden

[2] Univ Uppsala, Tandem Lab, Uppsala, Sweden

[3] Def Res Estab, Stockholm, Sweden

来源：

APPLIED RADIATION AND ISOTOPES | 2001年 / 54卷 / 02期

关键词：

atmosphere; Be-isotopes; Cs-137; Sweden; solar activity;

D O I：

10.1016/S0969-8043(00)00163-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We present weekly Be-7 (from 1972 to 1995), and weekly/seasonal Be-10 (for 1994) data in surface air from ground level stations in Sweden with a coverage of most of the northern high latitudes (56 degrees -68 degrees 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 Be-7 record and short-term (monthly-seasonal) change in solar activity is observed which introduces a new mechanism for driving the amplitude of seasonal variation. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：345 / 353

页数：9

共 13 条

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