Grand Canyon National Park, Arizona

1200 Slide Spectrum Series (1983 - 1996)

Cumulative Frequency Summary

Spectrum Sequence #	Representative Visibility Condition Summary			Representative Cumulative Frequency of Reconstructed Extinction IMPROVE Aerosol Data (1988 - 1997)
	dv	bext (Mm^-1)	VR (km)
1 of 15	0	10	390	< 1%
2 of 15	2	12	320	< 1%
3 of 15	3	13	290	< 1%
4 of 15	4	15	260	2%
5 of 15	5	16	235	3%
6 of 15	6	18	215	10%
7 of 15	7	20	195	20%
8 of 15	8	22	175	20%
9 of 15	9	25	160	40%
10 of 15	10	27	145	50%
11 of 15	11	30	130	60%
12 of 15	12	33	115	70%
13 of 15	13	37	105	90%
14 of 15	14	41	95	95%
15 of 15	22	90	40	100%

Prepared by Air Resource Specialists, Inc.

for the IMPROVE Program

1998