Table 3. Frequency Filters Used in the Modelsa		
 		

Filter	Period Windows, months	
	Passed	Blocked
Low pass A	(15, max)	(0, 12.5)
Band pass A	(18, 22.5)	(0, 17) and (24, max)
Band pass B	(7.7, 8.7)	(0, 7.3) and (9.1, max)
Band pass C	(15, 37)	(0, 12.5) and (50, max)
Band pass D	(11, 13)	(0,10.5) and (14, max)
Band pass E	(26.5, 33)	(0, 24) and (38, max)

aPassed ranges correspond to frequencies unaltered by the spectral window. Stopped ranges correspond to frequencies completely blocked. Frequencies in the transition intervals are damped; the spectral windows used are convolutions of a Hanning window and a step function. Max is 600 months.