Observed Solar Cycle Variations
The seasonal and solar cycle variations of electron density gradient scale length, vertical drift and layer height during magnetically quiet days: Implications for Spread F over Trivandrum, India
... kilometres observed in the night time F region (Chandra and Rastogi, 1970; Farley et ...seasonal variations of electron density gradient scale length L, had not been ...
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Seasonal variations of nighttime D region ionosphere in 2013 solar maximum observed from a low latitude station
... Oceanic Region; hence, the lightning density is very high. This creates favorable opportunities to study the turbu- lence of the D-region using the ELF-VLF waves radiated by lightning. Furthermore, the observation period ...
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Observed Solar Cycle Variation of the Stratospheric QBO Generated in the Mesosphere and Amplified by Upward Propagating Waves
... DOI: 10.4236/acs.2018.81005 68 Atmospheric and Climate Sciences tween the GW and background winds. This requires that the model is integrated with a short time step close to 5 minutes to achieve convergence with ...
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Effects of the Solar Cycles and Longer-Term Solar Variations: Modulation of Galactic Cosmic Radiation and Filtration of Neutral Atoms from the Local Interstellar Medium, Fatemeh Rahmanifard
... during solar minimum specified in the BON14 model is based on the observed relationship between sunspot number and GCR flux in the modern ...the solar maxima observed over the last 60 years ...
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Periodicities of Solar Wind Observed During 23 Solar Maximum
... of solar activity is the variable character of solar atmosphere an it is not homogeneous and contains diffuse ...the variations that are especially depending on are solar or planetary motions ...
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Occurrence frequencies of polar mesosphere summer echoes observed at 69 N during a full solar cycle
... Figure 1 shows the annual distribution of PMSE vol- ume reflectivity observed with ALWIN, ALWIN64 and MAARSY on Andøya between 1999 and 2012. The left bor- ders of the distributions illustrate the differences in ...
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Annual and Diurnal Variabilities in the Critical Frequency (foF2) during Geomagnetic Fluctuating Activity over Solar Cycles 21 and 22 at Ouagadougou
... four solar wind ...seasonal variations of foF2 during solar cycles 21 and 22 phases covered by Ouagadougou ionosonde station data (Lat: ...the solar maximum where we have a morning peak ...
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Observed solar dimming in the Wider Caribbean
... of solar radiation at the earth’s surface are a fact accepted by the overwhelming majority of the scientific ...called solar dimming- brightening phenomena, have been occurring at least during the second ...
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Ionospheric response to solar EUV variations: Preliminary results
... in solar flux units (sfu, 10 −22 W m −2 Hz −1 ) (Tapping, 1987; Rishbeth, 1993; Maruyama, ...long-term variations of EUV radiation are better represented by the solar proxies (Chen et ...the ...
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Effects of solar cycle variations on oxygen green line emission rate over Kiso, Japan
... The observed climatology in the present study proves this aspect that the tides have a great in uence on the nightglow emission and in addition, they also show that the effect is also a function of ...
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Terrestrial ground temperature variations in relation to solar magnetic variability, including the present Schwabe cycle
... going decade. The decrease to that low value started al- ready around the year 2000. Figure 4 may help to ex- plain why, after the sharp rise of the average terrestrial ground temperature between ~1950 and ~2000 (as ...
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The spatial density gradient of galactic cosmic rays and its solar cycle variation observed with the Global Muon Detector Network
... A solar disturbance propagating away from the Sun affects the population of galactic cosmic rays (GCRs) in a num- ber of ...temporal variations of the anisotropy and density gradient in association with the ...
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Direct evidence of a full dipole flip during the magnetic cycle of a sun-like star
... Epochs 2016.50 and 2017.50 were taken close to activity maximum in cycle II. The S-index cycle in Fig. 1 shows that our observations were taken before and after the peak of activity maximum. As the previous ...
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Modeling Solar Wind Turbulence: The Kolmogorov-like Way
... or small spatial scales. In the presence of two invariants as in 2D turbulence with total energy and the enstrophy as the two invariants there is a dual cascade as discussed by Hasegawa (1985) [9] and a fraction of the ...
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COMPARISON OF VARIABILITY OF foF2 DURING 23 rd & 24 th HIGH SOLAR ACTIVITY PERIOD AT LOW LATITUDE STATION JICAMARCA
... We observed that the strongest variation with solar activity is during ...the observed higher variability in foF2 at nighttime rather than during ...have observed abnormal pattern of ...
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Influence of Solar Cycle Variations on Solar Spectral Radiation
... absorbed solar radiation with elec- trical power; hence they are called “Electrically Cali- brated Radiometers” or ...of solar activity for cycles 21, 22 and ...SIDC, Solar Influences Data analysis ...
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The periodic variations of a white light flare observed with ULTRACAM
... A series of individual bursts arising from periodic mag- netic reconnection could also explain the periodic variations ob- served. Although reconnection is a dynamic phenomenon with a high degree of intermittency ...
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Long term evolution of geomagnetic activity under the influence of 11 year cyclic variations in solar activity during solar cycle 23 and 24
... with solar flares, prominence eruptions, and CMEs which follows the solar activity cycle and a second component (the “slowly varying” I component) associated with recurrent high speed solar ...
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RESPONSE OF NEUTRON MONITORS TO COSMIC RAY COUNTS: A STATISTICAL APPROACH
... Computed statistical parameters among the NM’s are illustrated in Table 4. Uncertainty parameters of cosmic ray counts at reference station Mc Murdo varies from 0.000194 to 0.000201.The values are very low indicating ...
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Electron Bulk Surface Density Effect on Critical Frequency in the F2 Layer
... imum solar cycle phases on foF2 time ...time variations is carried ...both solar minimum and max- imum is a new contribution carried out from this ...
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