The ionosphere varies over multiple time scales,which are classified into two categories: the climatology and weather *** this national report,we give a brief summary of recent progresses in ionospheric climatology wi...
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The ionosphere varies over multiple time scales,which are classified into two categories: the climatology and weather *** this national report,we give a brief summary of recent progresses in ionospheric climatology with focus on(1) the seasonal variations,(2) solar cycle effects, and(3) empirical modeling of the *** seasonal variations of the ionosphere have been explored in many works to give a more detailed picture with regional and global features at various altitudes by analyzing the observation data from various sources and ***,a series of studies reported the response of the ionosphere to solar cycle variations,which revealed some novel and detailed features of solar activity dependence of ionospheric parameters at different altitudes. These investigations have improved our understanding on the states of the ionosphere and underlying fundamental processes,provided clues to future studies on ionospheric weather,and guided ionospheric modeling,forecasting and related applications.
In this paper the smoothed monthly sunspot numbers of the previous 22 complete sunspot cycles are normalized in time domain,and then an eigen mode analysis is carried out for drawing the principle factors(or component...
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In this paper the smoothed monthly sunspot numbers of the previous 22 complete sunspot cycles are normalized in time domain,and then an eigen mode analysis is carried out for drawing the principle factors(or components) in the *** results show that the main characteristics of the solar cycles can be fairly well described by the first 5 eigen *** obtained eigen modes are applied to predict the declining phase of cycle 23 on the basis of the data prior to its *** prediction indicates that cycle 23 will continue for 127 months to December 2006,with the minimum of 6.2.
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