Cyclic variations of the heliospheric tilt angle and cosmic ray modulation

被引：20

作者：

Alanko-Huotari, K. ^{[2
]}

Usoskin, I. G. ^{[1
]}

Mursula, K. ^{[2
]}

Kovaltsov, G. A. ^{[3
]}

机构：

[1] Univ Oulu, Sodankyla Geophys Observ, Oulu Unit, FIN-90014 Oulu, Finland

[2] Univ Oulu, Dept Phys Sci, FIN-90014 Oulu, Finland

[3] AF Ioffe Phys Tech Inst, RU-194021 St Petersburg, Russia

来源：

ADVANCES IN SPACE RESEARCH | 2007年 / 40卷 / 07期

基金：

芬兰科学院;

关键词：

galactic cosmic rays; heliosphere; heliospheric current sheet tilt angle;

D O I：

10.1016/j.asr.2007.02.007

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Using data on cosmic ray modulation parameter since 1951, we have estimated the evolution of the heliospheric current sheet tilt angle for the period 1951-1975, i.e., 25 years before regular observations of the tilt angle. This estimate is based on our recent empirical model relating cosmic ray intensity with global heliospheric parameters. We propose a simple model to describe the cyclic evolution of the tilt angle with the solar cycle. This model agrees with available observational data. Using this model, we have estimated the cosmic ray intensity since 1710. This estimate is consistent with the results based on cosmogenic isotopes (C-14 and Be-10). (C) 2007 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：1064 / 1069

页数：6

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