Thursday, 7 June 2001
	
	
	
	
	
		A new class of exact dipole solutions have been developed based upon the modon construction applied to a surface quasigeostrophic model.  These vortex pairs can be considered as idealized disturbances propagating on a tropopause interface between two uniform PV layers.  Such dipolar structures are commonly obtained in computations of vortex turbulence.  Issues related to gravity wave generation and next-order balanced corrections are also addressed.
	
			
			
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