Articles | Volume 25, issue 17
https://doi.org/10.5194/acp-25-9583-2025
https://doi.org/10.5194/acp-25-9583-2025
Research article
 | 
01 Sep 2025
Research article |  | 01 Sep 2025

Impact of topographic wind conditions on dust particle size distribution: insights from a regional dust reanalysis dataset

Xinyue Huang, Wenyu Gao, and Hosein Foroutan

Data sets

NASA Shuttle Radar Topography Mission Global 3 arc second NASA JPL https://doi.org/10.5067/MEASURES/SRTM/SRTMGL3.003

Global Land Data Assimilation System (GLDAS) version 2/Noah land model 0.25 degree soil texture data NASA Goddard Space Flight Center (GSFC) and NOAA National Centers for Environmental Prediction (NCEP) https://ldas.gsfc.nasa.gov/gldas/soils

MONARCH high-resolution reanalysis data set of desert dust aerosol over Northern Africa, the Middle East and Europe E. Di Tomaso et al. https://earth.bsc.es/thredds_dustclim/homepage

MERRA-2 inst1_2d_asm_Nx: 2d, 1-Hourly, Instantaneous, Single-Level, Assimilation, Single-Level Diagnostics version 5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/3Z173KIE2TPD

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Short summary
This study investigates the relationship between the size of windblown dust aerosols and wind conditions over topography at a regional scale, utilizing 10 years of dust reanalysis data. Linear regression and machine learning models suggest that greater wind speeds and land slopes, particularly under uphill winds, are associated with increased fractions of coarser dust. Moreover, these positive correlations weaken during summer and afternoon events, probably related to the haboob storms.
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