ABOUT DUST^2

DUST^2 is a source-to-sink investigation of the dust system in the southwestern US as a component of the critical zone

The emission, transport, and deposition of mineral dust plays a key role in the critical zone, especially in mountain environments where dust deposition can alter the pH and chemistry of surface water, contribute to soil formation, deliver important nutrients, and decrease the albedo of snow, causing earlier snowpack melt.

Motivation for DUST^2

Given the significance of dust in the mountain critical zone, the reality that human activities are impacting the landscapes from which dust is emitted, and the likelihood that the global dust system will react to ongoing climate change, it is imperative to better understand the factors that control the emission of dust from arid landscapes, the transport and modification of this dust in the atmosphere, and the multitudinous effects that deposition of dust has on the geoecological functioning of mountain ecosystems.

DUST^2, the Dust across a Desert-Urban-Summit Transect project, is taking on this challenge using a network of carefully selected study sites extending from the Great Basin deserts of the southwestern US into the Rocky Mountains in northern Utah. This source-to-sink investigation of the dust system in this region will evaluate the hypothesis that “Human modifications to the natural dust cycle are driving emergent responses in Critical Zone processes, including soil erosion through eolian deflation, alterations in nutrient cycling and soil formation in response to chemical weathering, shifting hydrologic regimes as a result of snow albedo changes, and overall changes in geoecological functioning of dust-impacted ecosystems.”

The DUST^2 initiative consists of 6 interconnected projects, each lead by a different PI, that will collectively investigate the dust system

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Kevin Perry

Using In-Situ Measurements of Wind Erosion Parameters to Improve Modeled Dust Emissions in the Intermountain West”

Maura Hahnenberger

Identification of Dust Transport Pathways using In-Situ Particulate Matter Monitoring and Multi-Method Dust Modeling”

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Greg Carling

Tracing dust from emission sources to deposition and transport through watersheds”

McKenzie Skiles

“Dust on Snow Deposition: Dynamics, radiative forcing, and accelerated melt”

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Jeff Munroe

“Spatial, Temporal, and Geochemical Variability of Modern Dust and Impacts of Long-Term Dust Deposition on Pedogenesis”

Janice Brahney

“Determining the mobility, fate and ecological consequence of dust deposition to high elevation systems”

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