Mineral Dust Entrainment and Deposition (DEAD) model: Description and 1990s dust climatology
University of California, Irvine
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Abstract
We describe a model for predicting the size‐resolved distribution of atmospheric dust for climate and chemistry‐related studies. The dust distribution from 1990 to 1999 is simulated with our mineral aerosol entrainment and deposition module embedded in a chemical transport model. Mobilization processes include entrainment thresholds for saltation, moisture inhibition, drag partitioning, and saltation feedback. For mobilization we assume that soil texture is globally uniform and is replete with saltators. Soil erodibility is prescribed by a new physically based geomorphic index that is proportional to the runoff area upstream of each source region. Dry deposition processes include sedimentation and turbulent…
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Topics
Keywords
- Mineral dust
- Atmospheric sciences
- Environmental science
- Plume
- Aerosol
- Outflow
- Deposition (geology)
- Entrainment (biomusicology)
UN Sustainable Development Goals
- Life below water
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