Asymmetry of Sunspot distribution. What does this mean, is there any relate to the global worming?
The solar activity features on the solar disk are not identical in the northern or the southern solar hemispheres. This North-South asymmetry (ANS) is considered to be a new index to tracing the nature of solar activity and the solar cycles. Sunspots are short-termfeatures on 
the solar disk that appear as dark spots compared to surrounding regions.The sunspots numbersdemonstrate an asymmetry of its distribution over the solar disk. The north-south asymmetry is considered to be due to periodical activities between the solar hemispheres. The asymmetry was northern dominated during the cycles 19 and 20 (1955- 1975), while during cycle 21 (1975-1986) it was southern dominated.
the solar disk that appear as dark spots compared to surrounding regions.The sunspots numbersdemonstrate an asymmetry of its distribution over the solar disk. The north-south asymmetry is considered to be due to periodical activities between the solar hemispheres. The asymmetry was northern dominated during the cycles 19 and 20 (1955- 1975), while during cycle 21 (1975-1986) it was southern dominated.
In Hassan Basurah’s article from Department of Astronomy, King Abudlaziz University, Saudi Arabia, published in IJAA, 2013 Vol.3 by Scientific Research Publishing.(This part needs to be mentioned.)
His team examineobservations of KAU solar Observatory between 1981 and 2009 to investigate the North-South asymmetry (ANS) variation of the sunspot numbers and its area. They used a statistical analysis to describe the asymmetry of sunspot activity in the solar hemispheres, and there results were agree with the global predictions of the asymmetry.
They found that the southern dominated continued during the solar cycles 22 and 23 (1986-2009). And they expect that the domination will shift to the north hemisphere by the next cycle 25 (2020-2030), the results were in compliance with the global asymmetry.This asymmetry was quiet evidently exists and following a long-term variation scale of the solar activity which hopefully will help to understanding the mechanism of ANS, and predict the level of the solar activity. Another important point has commented in this articlewhere they pointed to the possible connection of the long solar variability to the terrestrial weather, as describe at Basurah (2005).
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