Boris Komitov

The sunspot cycle no. 24 in relation to long term solar activity variation.

The solar minimum between solar cycles 23 and 24 during the period 2007–2009 has been the longest and deepest one at least since for the last 100 years. We suggest that the Sun is going to his next supercenturial minimum. The main aim of this paper is to tell about arguments concerning this statement. They are based on series of studies, which have been provided during the period since 1997 up to 2010. The progress of solar cycle 24 since its minimum at the end of 2008 up to the end of October 2011 in the light of long term solar activity dynamics is analyzed.

The Sunspot Activity in the Last Two Millenia on the Basis of Indirect and Instrumental Indexes: Time Series Models and Their Extrapolations for the 21st Century

In the present study a time series analysis of three of the most well-known Sun activity data series is made: 1) the Hoyt-Schatten (Group Sunspot Number

Optical investigations of magnetospheric-ionospheric coupling by using data from the Intercosmos-19 satellite

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Ozone vertical distribution in Mars polar atmosphere

)(Hoyt & Schatten 1988); 2) the Schove and 3) the Greenland (Dye-3 ice probe) ‘cosmogenic’

Amplitude Variations of the 11 Year Cycle and the Current Solar Maximum 23

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The "Sun - climate" relationship. II. The "cosmogenic" beryllium and the middle latitude aurora.

concentration series (Schove 1983, Beer et al . 1998). The series “1” is based on instrumental observations for the last

The metastable oxygen O(1D) as a possible source of OH molecules in the cometary atmospheres

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The "Sun - climate" relationship. I. The sunspots and the climate.

400 years. The series “2” is a reconstruction of all Schwabe-Wolf cycle magnitudes after AD 296 by use of historical reports mainly for auroras and naked-eye visible sunspots. The series “3” is an indicator for the processes in outer solar corona and interplanetary space for the epoch AD 1423–1985. Two independent methods for time series analysis are used: 1) the

The supercenturial solar minima and their preceding phenomena

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Synthetic solar X-ray flares time series since AD 1968 /s2

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