On Determining the Rise, Size, and Duration Classes of a Sunspot CycleNational Aeronautics and Space Administration, Marshall Space Flight Center, 1996 - Solar cycle - 11 pages |
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... fast - rising and slow - rising cycles as a function of elapsed time in months from cycle onset ( minimum amplitude Rm occurrence ) , based on a comparison of smoothed sunspot number for time t , denoted R ( t ) , with the mean curve ...
... fast - rising and slow - rising cycles as a function of elapsed time in months from cycle onset ( minimum amplitude Rm occurrence ) , based on a comparison of smoothed sunspot number for time t , denoted R ( t ) , with the mean curve ...
Page 1
... ( fast rising ) with shorter than average cycle length ( short period ) and longer than average ascent duration ( slow rising ) with longer than average cycle length ( long period ) . In particular , he found that when the cycle was a fast ...
... ( fast rising ) with shorter than average cycle length ( short period ) and longer than average ascent duration ( slow rising ) with longer than average cycle length ( long period ) . In particular , he found that when the cycle was a fast ...
Page 2
... fast - large cycles ( quadrant IV ) and slow - small cycles ( quadrant II ) . This is the Waldmeier effect . For cycles 1 to 21 , 18 of 21 cycles strictly obey the inferred inverse correlation , associating fast ( slow ) rise time with ...
... fast - large cycles ( quadrant IV ) and slow - small cycles ( quadrant II ) . This is the Waldmeier effect . For cycles 1 to 21 , 18 of 21 cycles strictly obey the inferred inverse correlation , associating fast ( slow ) rise time with ...
Page 3
... fast- and slow - rising cycles in comparison to the mean curve for cycles 1 to 21 by means of histograms for the first 12 months of a sunspot cycle following onset . Fast cycles are denoted by the cross - hatched pattern . Plotted are ...
... fast- and slow - rising cycles in comparison to the mean curve for cycles 1 to 21 by means of histograms for the first 12 months of a sunspot cycle following onset . Fast cycles are denoted by the cross - hatched pattern . Plotted are ...
Page 4
... fast or slow riser , then we also expect it to be of short or long period , respectively . The decision rule to regard cycle 23 as a fast or slow riser , based upon its R ( 12 ) value in compari- son to < R ( 12 ) > ( fig . 6 ) is ...
... fast or slow riser , then we also expect it to be of short or long period , respectively . The decision rule to regard cycle 23 as a fast or slow riser , based upon its R ( 12 ) value in compari- son to < R ( 12 ) > ( fig . 6 ) is ...
Common terms and phrases
5-percent level amplitude cycles amplitude Rm occurrence ASC-PER ASC-SCN ascent duration ASC behavior of cycle chi-square statistic chi-square test statistic Comparison of smoothed cycle 23 turns cycle numberedness cycles fit David H denoted R(t Determining the Rise Duration Classes early behavior fast or slow fast riser fast-rising cycle Fisher's exact test function of elapsed Geophys Hathaway Histogram independence between ASC involving two variables large amplitude large-amplitude cycle long period long-period cycle marginally significant Marshall Space Flight maximum amplitude RM mean curve cycles median value mutual independence involving NASA null hypothesis onset for cycle original distribution percent period classes ratio Reichmann related to ascent RM and ASC SECURITY CLASSIFICATION Short Long short-period cycle shorter than average shown in figure slow riser small amplitude small-amplitude cycles smoothed sunspot number Space Flight Center standard deviation units statistical significance Testing for mutual tion values for cycle variation of maximum Waldmeier effect Wilson