Results 171 to 180 of about 5,935 (192)

Observing Forbush decreases in cloud atShetland

Journal of Atmospheric and Solar-Terrestrial Physics, 2010
Abstract Meteorological measurements from Lerwick Observatory, Shetland (60°09′N, 1°08′W), are compared with short-term changes in Climax neutron counter cosmic ray measurements. For transient neutron count reductions of 10–12%, broken cloud becomes at least 10% more frequent on the neutron minimum day, above expectations from sampling. This suggests
R. Giles Harrison, Maarten H.P. Ambaum
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Forbush decreases and interplanetary disturbances

Il Nuovo Cimento B, 1973
The correlation between perturbations of the interplanetary medium and Forbush decrease events is studied by using interplanetary-magnetic-field and cosmic-ray data for the period March to November 1968, with the purpose of investigating the particular mechanism responsible for this type of modulation of the cosmic-ray intensity.
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Forbush decreases and geomagnetic storms

Geomagnetizm i aèronomiâ
Forbush decreases in galactic cosmic rays (according to data from a network of neutron monitors) and accompanying geomagnetic disturbances over a long period from 1957 to 2022 have been identified and studied. Statistical relationships between various parameters of cosmic ray flux and geomagnetic activity indices are analyzed.
A. V. Belov, E. A. Belova, N. S. Shlyk, M. A. Abunina, A. A. Abunin, S. M. Belov   +5 more
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Flares, Forbush decreases, and geomagnetic storms

Journal of Geophysical Research, 1969
Geomagnetic storms and Forbush decreases accounted for by interplanetary solar corpuscular streams effects described by interplanetary magnetic field structure, noting independence of ...
J. R. Ballif, D. E. Jones
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Forbush decreases in the cosmic radiation

Space Science Reviews, 1971
The experimental observations of Forbush decreases in recent years are reviewed and related to different theoretical models which have been proposed. The observational data from both ground-based and spacecraft experiments were selected to illustrate the important characteristics of Forbush decreases.
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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
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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
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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
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