“…Although the measured dust record is not long enough to conclusively define normal annual dust trends, the dust record does appear to follow a pattern established by past visibility studies (Orgill & Sehmel, 1976;Pollard, 1977;Goudie, 1983;Peterson & Gregory, 1993). Within the SHP, most observers agree that the majority of dust events occur during the spring season due to a combination of strong winds and a preponderance of dry and bare soils (Sidwell, 1938;LaPrade, 1954;Lee et al, 1994).…”