INVESTIGATING THE INFLUENCE OF GEOMETRY OF THE HELIOSPHERIC NEUTRAL CURRENT SHEET AND SOLAR ACTIVITY ON MODULATION OF GALACTIC COSMIC RAYS WITH A METHOD OF MAIN COMPONENTS
Journal Title: Solar-Terrestrial Physics - Year 2020, Vol 6, Issue 1
Abstract
The work studies the cumulative modulating effect of the geometry of the interplanetary magnetic field's neutral current sheet and solar activity on propagation of galactic cosmic rays in the heliosphere. The role of each factor on the modulation of cosmic rays is estimated using a method of main components. The application of the method to experimental data on solar activity, to the tilt angle of the neutral sheet, and cosmic ray intensity for a long period from 1980 to 2018 allows us to reveal the temporal dynamics of roles of these factors in the modulation. The modulation character is shown to strongly depend on the polarity of the Sun’s general magnetic field. Results of the study confirm the existing theoretical concepts of the heliospheric modulation of cosmic rays and reflect its peculiarities for almost four full cycles of solar activity.
Authors and Affiliations
Gololobov P. Yu. , Krivoshapkin P. A. , Krymsky G. F. , Gerasimova S. K.
Keywords
Related Articles
- EP ID EP700047
- DOI 10.12737/stp-61202002
- Views 121
- Downloads 0
RESPONSE OF IONOSPHERIC ELECTRON DENSITY PROFILE TO THE ACTION OF POWERFUL HF RADIO-WAVE RADIATION
Using electron density and temperature equations, we have modeled the dynamics of the electron density profile in the ionosphere due to the expulsion of plasma from localization regions of plasma waves, pumped by high-po...
DIAMAGNETIC PLASMOIDS AS PART OF DIAMAGNETIC STRUCTURES OF THE SLOW SOLAR WIND AND THEIR IMPACT ON EARTH’S MAGNETOSPHERE
We have shown that diamagnetic structures (DSs), which form the basis of the slow quasi-stationary solar wind (SW), are observed in Earth’s orbit as a sequence of DSs of various scales. The analysis of this phenomenon in...
APPEARANCE OF ACTIVE REGIONS AT THE END OF SOLAR CYCLE 24 AND AT THE BEGINNING OF CYCLE 25
The spatial-temporal picture of appearance of active regions and the relationship of their appearance with the structure and development of a large-scale magnetic field were studied during the transition from solar cycle...
STATISTICAL RELATIONSHIPS BETWEEN VARIATIONS OF THE GEOMAGNETIC FIELD, AURORAL ELECTROJET, AND GEOMAGNETICALLY INDUCED CURRENTS
Using observations from the IMAGE magnetic observatories and the station for recording geomagnetically induced currents (GIC) in the electric transmission line in 2015, we examine relationships between geomagnetic field...
THE PROCESSES OF ENERGY RELEASE IN LOW-POWER SOLAR FLARES
Using flare patrol data for 1972–2010 [http://www.ngdc.noaa.gov/stp/space-weather/solar-data/solar-features/solar-flares/], we have conducted statistical studies of small solar flares. We have established a correlation b...