Abstract by Michael Goodman
Wasatch Front atmospheric deposition reflects regional desert dust and local anthropogenic sources
Dust originating from dry lakes contributes harmful elements to downwind urban areas and mountain snowpack that is compounded by local contaminant inputs from anthropogenic sources. In Utah, urban areas are located downwind of several Great Basin playas. We sampled and measured element concentrations of playa dust sources, urban dust deposition, and snow dust deposition. Elements found at high concentrations in playas include Li, Na, Mg, Ca, Sr, and U. Elements found at high concentrations in urban and snow samples include Be, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Se, Y, Ag, Cd, Sb, Ba, La and REE’s, and Th. These elements are primarily sourced from urban activity which includes tire wear, brake pad abrasion, fossil fuel combustion, petrochemical industry, and local soil disturbances. Seasonal urban dust samples indicate strong dust events in Jan-Mar 2018 due to spikes in Sr and Na concentrations and dilution in Co and Se. In addition to playa-associated elements, Cd and Se are highly bioavailable, which are harmful for human and wildlife consumption.