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4.b.  Horizontal mean fields
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    Figure 12a shows the diurnal variation 
	of the vertical profiles of horizontal mean temperature 
	and potential temperature of 
	the 6th day, 
	when the amount of atmospheric dust 
	reaches almost the equilibrium value. 
    The profiles of horizontal mean temperature 
	and potential temperature show fairly regular diurnal
	change, 
	while that of atmospheric dust shows little change
        (Figure 11b).
    The depth of convection layer during daytime is about 5km, 
	which is roughly a half of that in the dust-free case 
	(Figure 3e). 
    The reason for the decrease of the depth of convection layer is 
	the stratospheric temperature increase 
	due to the radiative
	heating caused by the dust absorption of solar radiation. 
     
    
     
    
    
    
     
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    Figure 12a:
    Time development of the vertical profiles of horizontal mean 
	temperature (left panel) and potential temperature (right
	panel) of the dusty case. 
    Profiles are for every 4 hours from LT = 8:00
	of the sixth day. 
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Other results of horizontal mean field
 
 
 
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