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Hualapai Tribe
Chemical components responsible for haze
At the Meadview (MEAD1) site, the average PM2.5 mass concentration during 2/2003-12/2003 is 4.5 mg/m3, and the average total light extinction coefficient (Bext) is 27 Mm-1 (Visual Range ~ 144 Km; Deciview ~ 10). Sulfate, OMC and CM are the largest contributors to haze, with an average contribution of 17%, 16% and 16%, respectively. 
Figure 1. Average contributions of major aerosol chemical components to light extinction
Figure 2 indicates that higher haze levels were found in October and the later spring and early summer. Sulfate, CM and organics each contributes ~ 20% to light extinction during June to July. In October, OMC and dust (CM + fine soil) each contributes more than 25% to light extinction.
Figure 2. Average contributions of major aerosol chemical components to light extinction in each month
For a detailed examination of the aerosol characteristics at the Meadview site consult the aerosol description web page.
 

Last updated 6 December 2005