Surface wind accuracy for modeling mineral dust emissions: Comparing two regional models in a Bodélé case study

Details Surface wind accuracy for modeling mineral dust emissions: Comparing two regional models in a Bodélé case study Surface wind accuracy for modeling mineral dust emissions: Comparing two regional models in a Bodélé case study

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3509804l&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 9, CiteID L09804

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Computation

4

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Processes: Regional Modeling, Atmospheric Processes: Land/Atmosphere Interactions (1218, 1631, 1843), Atmospheric Processes: Mesoscale Meteorology

Scientific paper

After a decade of research on improving the description of surface and soil features in desert regions to accurately model mineral dust emissions, we now emphasize the need for deeper evaluating the accuracy of modeled 10-m surface wind speeds U 10 . Two mesoscale models, the Lokal-Modell (LM) and the Regional Atmospheric Modeling System (RAMS), coupled with an explicit dust emission model have previously been used to simulate mineral dust events in the Bodélé region. We compare LM and RAMS U 10 , together with measurements at the Chicha site (BoDEx campaign) and Faya-Largeau meteorological station. Surface features and soil schemes are investigated to correctly simulate U 10 intensity and diurnal variability. The uncertainties in dust emissions computed with LM and RAMS U 10 and different soil databases are estimated. This sensitivity study shows the importance of accurate computation of surface winds to improve the quantification of regional dust emissions from the Bodélé

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