DOI: 10.1002/2017JA023994
Scopus记录号: 2-s2.0-85040747384
论文题名: Interplanetary Magnetic Field Turbulence and Rigidity Spectrum of the Galactic Cosmic Rays Intensity Variation (1969–2011)
作者: Siluszyk M. ; Alania M.V. ; Iskra K. ; Miernicki S.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 1 起始页码: 30
结束页码: 38
语种: 英语
英文关键词: galactic cosmic rays
; interplanetary magnetic field
; power spectral density
; rigidity spectrum
; turbulence
英文摘要: The present study investigates the relation between the rigidity R spectrum exponent γ of the galactic cosmic rays (GCR) flux changes (δD(R)/D(R) ∝ R−γ) and the exponents νy and νz of the power spectral density of the By and Bz components of the heliospheric magnetic field (HMF) fluctuations. Two parameters have been introduced: (1) the exponent γ demonstrating the rigidity dependence of long-term changes of GCR flux on solar activity (SA) and (2) the exponents νy and νz signifying the state of turbulence which is divided of the By and Bz components. This study considers the period of time between 1969 and 2011 divided into four subperiods, according to the solar global magnetic field polarities: (I) 1969–1979, (A > 0) (positive polarity magnetic field lines are directed away from the Sun's northern hemisphere); (II) 1980–1988, (A < 0) (negative polarity magnetic field lines are directed toward the Sun's northern hemisphere); (III) 1991–2001, (A > 0); and (IV) 2002–2011, (A < 0). The paper finds that temporal changes of the resonant frequency (fres) of GCR protons in heliospheric magnetic field turbulence in relation to SA are mainly caused by variations of the induction of B components from year to year, while the contribution of the solar wind speed remains insignificant. The analyses of the four subperiods show that γ increases and νy and νz decrease in the periods of increased SA, and conversely, the γ decreases and νy and νz increase in the periods of reduced SA. The study concludes that the exponents γ, and νy and νz can be considered as important indices (proxies) for research on GCR transport in the heliosphere. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114751
Appears in Collections: 气候减缓与适应
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作者单位: Siedlce University of Natural Sciences and Humanities, Siedlce, Poland; AGH University of Science and Technology, Cracow, Poland; Ivan Javakhishvili Tbilisi State University, Nodia Institute of Geophysics, Tbilisi, Georgia; Polish Air Force Academy, Deblin, Poland; B. Prus High School, Siedlce, Poland
Recommended Citation:
Siluszyk M.,Alania M.V.,Iskra K.,et al. Interplanetary Magnetic Field Turbulence and Rigidity Spectrum of the Galactic Cosmic Rays Intensity Variation (1969–2011)[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(1)