caa a22 4500 445346000 CHVBK 20180317142829.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s11207-011-9726-5 doi (NATIONALLICENCE)springer-10.1007/s11207-011-9726-5 Kakad B. Indian Institute of Geomagnetism, Plot-5, Sector-18, New Panvel West, Navi Mumbai, India aut A New Method for Prediction of Peak Sunspot Number and Ascent Time of the Solar Cycle [Elektronische Daten] [B. Kakad] The purpose of the present study is to develop an empirical model based on precursors in the preceding solar cycle that can be used to forecast the peak sunspot number and ascent time of the next solar cycle. Statistical parameters are derived for each solar cycle using "Monthly” and "Monthly smoothed” (SSN) data of international sunspot number (R i). Primarily the variability in monthly sunspot number during different phases of the solar cycle is considered along with other statistical parameters that are computed using solar cycle characteristics, like ascent time, peak sunspot number and the length of the solar cycle. Using these statistical parameters, two mathematical formulae are developed to compute the quantities [Q C] n and [L] n for each nth solar cycle. It is found that the peak sunspot number and ascent time of the n+1th solar cycle correlates well with the parameters [Q C] n and [L] n /[S Max] n+1 and gives a correlation coefficient of 0.97 and 0.92, respectively. Empirical relations are obtained using least square fitting, which relates [S Max] n+1 with [Q C] n and [T a] n+1 with [L] n /[S Max] n+1. These relations predict a peak of 74±10 in monthly smoothed sunspot number and an ascent time of 4.9±0.4 years for Solar Cycle24, when November 2008 is considered as the start time for this cycle. Three different methods, which are commonly used to define solar cycle characteristics are used and mathematical relations developed for forecasting peak sunspot number and ascent time of the upcoming solar cycle, are examined separately. Springer Science+Business Media B.V., 2011 Solar cycle prediction nationallicence Models nationallicence Sunspots nationallicence Solar Physics Springer Netherlands 270/1(2011-05-01), 393-406 0038-0938 270:1<393 2011 270 11207 https://doi.org/10.1007/s11207-011-9726-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-011-9726-5 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kakad B. Indian Institute of Geomagnetism, Plot-5, Sector-18, New Panvel West, Navi Mumbai, India aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 270/1(2011-05-01), 393-406 0038-0938 270:1<393 2011 270 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer