|   | 
				
					
	
		  | 
	 
	
		| Paper: | 
		Cyclic Magnetic Variations of the Sun | 
	 
	
		| Volume: | 
		154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop | 
	 
	
		| Page: | 
		131 | 
	 
	
		| Authors: | 
		Wang, Y.-M. | 
	 
	
	
		| Abstract: | 
		Magnetograph observations now provide a comprehensive picture of the Sun's large-scale magnetic field and its evolution over the last two sunspot cycles. The formation and reversal of the polar fields can be understood in terms of a flux transport model that includes the effect of a 10-20 m s^{-1} poleward surface flow. The evolution and rotational behavior of photospheric field patterns, of large-scale coronal structures such as coronal holes, and of solar wind streams are discussed and given simple physical interpretations. | 
	 
	
		| 
			
			
		 | 
	 
	
		  | 
	 
 
					 
				 | 
				  |