Results 181 to 190 of about 4,068 (213)

Forbush Decreases and Cloud Cover

2005
According to the cosmic ray cloud hypothesis, changes in the cosmic ray intensity over the past two and a half solar cycles caused significant changes in the Earth's cloud cover with important consequences for the climate. To test this hypothesis we investigated on a global scale the atmospheric cloud cover and the variation of the atmospheric ...
Čalogović, Jaša, Beer, Jürg, Desorgher, Laurent, Flückiger, Erwin   +3 more
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Asymmetries in the Forbush decreases of the cosmic radiation: 2. Superimposed intensity variations during a Forbush decrease

Journal of Geophysical Research, 1963
Intensity increases or decreases, which are sometimes a strong function of longitude, are frequently found superimposed on the normal behavior of the cosmic-ray intensity during Forbush decreases. A study has been made of these effects utilizing the neutron monitor data from many stations distributed in latitude and longitude. The anisotropies recorded
J. A. Lockwood, H. Razdan
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Types of interplanetary shocks and forbush decreases

Solar Physics, 1991
Two types of interplanetary shocks have been identified and classified into two groups, those associated with a helium-enhancement and those not associated with any helium-enhancement. The cosmic-ray intensity decreases at Calgary neutron monitor are studied with respect to the arrival time of the two groups of shocks.
null Badruddin, D. Venkatesan, A. G. Ananth   +2 more
openaire   +1 more source

What determines the magnitude of forbush decreases?

Advances in Space Research, 2001
Abstract Cosmic ray Forbush effects (FEs) have been studied for more than 60 years, but even today this phenomenon has no universally accepted definition, which leads to misunderstanding among researchers. There are no complete and convincing answers to the following questions: What are the distinctive features of FEs?
A.V. Belov, E.A. Eroshenko, V.A. Oleneva, A.B. Struminsky, V.G. Yanke   +4 more
openaire   +1 more source

Coronal Mass Ejections and Forbush Decreases

Space Science Reviews, 2000
Coronal Mass Ejections (CMEs) are plasma eruptions from the solar atmosphere involving previously closed field regions which are expelled into the interplanetary medium. Such regions, and the shocks which they may generate, have pronounced effects on cosmic ray densities both locally and at some distance away. These energetic particle effects can often
openaire   +1 more source

Latitude-dependence of a forbush type decrease

Il Nuovo Cimento, 1961
Latitude-dependence of a cosmic ray intensity decrease has been found. It has been shown that the relative amplitude does not flatten beyond the latitude knee. It, rather, goes on increasing even much beyond the knee. It is also seen that the relative amplitude is not symmetrical around the geomagnetic equator.
Lekh Vir, P. S. Gill
openaire   +1 more source

Shock Orientations, Magnetic Turbulence and Forbush Decreases

Solar Physics, 2002
We have studied the effects of quasi-parallel and quasi-perpendicular shocks on the transient modulation of cosmic-ray intensity. Interplanetary magnetic field strength, its variance and solar wind velocity during their passage have also been considered for the analysis in this work.
openaire   +1 more source

Forbush decreases associated to Stealth Coronal Mass Ejections

Central European astrophysical bulletin, 2015
Interplanetary coronal mass ejections (ICMEs) are structures in the solar wind that are the counterparts of coronal mass ejections (CMEs) at the Sun. It is commonly believed that enhanced magnetic fields in interplanetary shocks and solar ejecta as well as the increased turbulence in the solar wind sheath region are the cause of Forbush decreases (FDs)
Vršnak, Bojan, Dumbović, Mateja
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Forbush decreases associated to Stealth CME

2014
Interplanetary coronal mass ejections (ICMEs) are structures in the solar wind that are the counterparts of coronal mass ejections (CMEs) at the Sun. It is commonly believed that enhanced magnetic elds in interplanetary shocks and solar ejecta as well as the increased solar wind speed are the cause of Forbush decreases (FDs) that are intensity ...
Dumbović, Mateja, Vršnak, Bojan
openaire  

Automated detection of simultaneous/non-simultaneous Forbush decreases and the associated cosmic ray phenomena

Journal of Atmospheric and Solar-Terrestrial Physics, 2020
Ogbonnaya Okike
exaly