WARI1 (Walker River Tribe, NV)
Since a whole calendar year of aerosol data is not available, no analysis about the 20% worst haze days can be done. Based on the data available from 7/2003-12/2003, OMC and dust are major contributors to haze in the warm season. In the cold season, OMC and nitrate are important.
In WARI1, the average PM2.5 mass concentration during 7/2003-12/2003 is 5.7 mg/m3, and the average total light extinction coefficient (Bext) is 24 Mm-1 (Visual Range ~ 163 Km; Deciview ~ 9). OMC and CM are the largest contributors to haze, with an average contribution of 23% and 18%, respectively. Figure 2 indicates that OMC contributes 20-30% to haze all-around the year. CM contributes ~20% to haze from July to October, and nitrate contributes ~15% in November and December.
Figure 1. Average contributions of major aerosol chemical components to light extinction
Figure 2. Average contributions of major aerosol chemical components to light extinction in each month