Solar wind modulation of galactic cosmic rays

We have analyzed the annual mean hourly data for the solar wind speed (V), the interplanetary magnetic field (IMF) intensity (B), and the neutron monitor (NM) rates for 1964–1998, covering three sunspot number (SSN) cycles (20, 21, 22). The analysis brings out some of the steady state characteristic...

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Bibliographic Details
Published inGeophysical research letters Vol. 30; no. 3; pp. 1133 - n/a
Main Author Ahluwalia, H. S.
Format Journal Article
LanguageEnglish
Published American Geophysical Union 01.02.2003
Blackwell Publishing Ltd
Subjects
Cosmic rays
Energetic particles
Energetic particles, heliospheric
Interplanetary Physics
Solar cycle variations
Solar Physics, Astrophysics, and Astronomy
Solar wind plasma
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Summary:We have analyzed the annual mean hourly data for the solar wind speed (V), the interplanetary magnetic field (IMF) intensity (B), and the neutron monitor (NM) rates for 1964–1998, covering three sunspot number (SSN) cycles (20, 21, 22). The analysis brings out some of the steady state characteristics of the long‐term changes in the observed galactic cosmic ray (GCR) modulation and the ‘mini’ cycle. We find that BV time series reproduces the observed variations of a variety of phenomena, including the 11‐yr and the 27‐day GCR modulations. We reaffirm that convective removal of GCR by the solar wind accounts for a major part of the observed modulations in the inner heliosphere.
Bibliography:istex:A2B066F05CE0AD1B1A200E0F11B2B0D6AC3DD05A
ark:/67375/WNG-H1WPKWXC-H
ArticleID:2002GL016017
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0094-8276
1944-8007
DOI:10.1029/2002GL016017