Big Bend National Park, Texas

0900 Slide Spectrum Series (1981 - 1995)

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 12	0	10	391	< 1%
2 of 12	3	13	300	< 1%
3 of 12	5	16	240	1%
4 of 12	7	20	200	3%
5 of 12	8	22	180	4%
6 of 12	9	24	160	5%
7 of 12	10	26	150	10%
8 of 12	10	28	140	20%
9 of 12	14	39	100	50%
10 of 12	17	56	70	80%
11 of 12	19	65	60	90%
12 of 12	30	196	20	>99%

Prepared by Air Resource Specialists, Inc.

for the IMPROVE Program

1998