Impact of atmospheric dust emission schemes on dust production and concentration over the Arabian Peninsula

Christos Fountoukis, Luis Ackermann, Mohammed A. Ayoub, Ivan Gladich, Ross D. Hoehn, Adam Skillern

Research output: Contribution to journalArticleResearchpeer-review

31 Citations (Scopus)

Abstract

This study examines the impact of two of the most advanced dust emission schemes on the predictions of the weather research and forecasting model with chemistry (WRF-Chem) over the Middle East during a summer time period. Results show significant differences between the two simulations in the spatial distribution of dust emissions as well as in their size-resolved mass discretization. The AFWA scheme simulation predicts 30 % higher dust emission fluxes than the S11 module over the Arabian Peninsula (6.7 μg m−2 s−1 compared to 4.5 μg m−2 s−1, respectively). In the S11 simulation 70 % of the emitted dust is in the 10–20 μm size range while the AFWA simulation assigns 50 % of dust emitted particles in the 6–12 μm size section. Both simulations reproduce the majority of the ambient PM10 data (more than 70 %) within a factor of two. However, the S11 simulation predicts, on average, 50 % lower PM10 concentrations compared to AFWA over the high resolution (2 × 2 km2) domain of Qatar. Previous applications of WRF-Chem may have substantially overestimated the simulated dust in this region.

Original languageEnglish
Article number115
Number of pages6
JournalModeling Earth Systems and Environment
Volume2
Issue number3
DOIs
Publication statusPublished - Sept 2016
Externally publishedYes

Keywords

  • Aerosol size distribution
  • Atmospheric particulate matter
  • Chemical transport modeling
  • WRF-Chem

Cite this