scholarly journals 27-Day Recurrence of Cosmic-Ray Intensity at the Minimum Solar Activity

1959 ◽  
Vol 11 (1) ◽  
pp. 6-10
Author(s):  
Masahiro KODAMA
Keyword(s):  
Solar Activity ◽  
Cosmic Ray ◽  
Cosmic Ray Intensity ◽  
Minimum Solar Activity

scholarly journals Solar activity, 27-day variation and long term modulation of cosmic ray intensity

Solar Physics ◽  
1970 ◽  
Vol 11 (1) ◽  
pp. 151-154 ◽  
Author(s):  
V. K. Balasubrahmanyan ◽  
D. Venkatesan
Keyword(s):  
Solar Activity ◽  
Cosmic Ray ◽  
Cosmic Ray Intensity

scholarly journals The ‘Sterno-Etrussia’ Geomagnetic Excursion Around 2700 BP and Changes of Solar Activity, Cosmic Ray Intensity, and Climate

Radiocarbon ◽  
2004 ◽  
Vol 46 (2) ◽  
pp. 661-681 ◽  
Author(s):  
V A Dergachev ◽  
O M Raspopov ◽  
B van Geel ◽  
G I Zaitseva
Keyword(s):  
Magnetic Properties ◽  
Solar Activity ◽  
Ocean Circulation ◽  
Cosmic Ray ◽  
Thunderstorm Activity ◽  
Causal Mechanism ◽  
Global Changes ◽  
Cosmic Ray Intensity ◽  
Temperature Regimes ◽  
Galactic Cosmic Ray

The analysis of both paleo- and archeomagnetic data and magnetic properties of continental and marine sediments has shown that around 2700 BP, the geomagnetic Sterno-Etrussia excursion took place in 15 regions of the Northern Hemisphere. The study of magnetic properties of sediments of the Barents, Baltic, and White Seas demonstrates that the duration of this excursion was not more than 200–300 yr.Paleoclimatic data provide extensive evidence for a sharp global cooling around 2700 B P. The causes of natural climate variation are discussed. Changes of the galactic cosmic ray intensity may play a key role as the causal mechanism of climate change. Since the cosmic ray intensity (reflected by the cosmogenic isotope level in the earth's atmosphere) is modulated by the solar wind and by the terrestrial magnetic field, this may be an important mechanism for long-term solar climate variability. The Sterno-Etrussia excursion may have amplified the climate shift, which, in the first place, was the effect of a decline of solar activity. During excursions and inversions, the magnetic moment decreases, which leads to an increased intensity of cosmic rays penetrating the upper atmosphere. Global changes in the electromagnetic field of the earth result in sharp changes in the climate-determining factors in the atmosphere, such as temperatures, total pressure field, moisture circulation, intensity of air flows, and thunderstorm activity. In addition, significant changes in the ocean circulation patterns and temperature regimes of oceans will have taken place.

Forbush decreases at different periods of the solar cycle

1968 ◽  
Vol 46 (10) ◽  
pp. S859-S861
Author(s):  
K. Imazhanova ◽  
E. V. Kolomeets ◽  
M. Musabaev ◽  
V. T. Pivneva
Keyword(s):  
Solar Activity ◽  
Solar Cycle ◽  
Cosmic Ray ◽  
Particle Energy ◽  
Forbush Decreases ◽  
Cosmic Ray Intensity ◽  
Recovery Times ◽  
Using Data ◽  
Neutron Component ◽  
Worldwide Network

An analysis of Forbush decreases occurring at different periods of the solar cycle has been carried out using data from the worldwide network of stations registering the neutron component of the cosmic-ray intensity. The changes of energy spectrum of Forbush decreases have been investigated for the interval from 1957 to 1965, and also the dependence of the decrease and recovery times on particle energy and solar activity.

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