Publication Date:
2019-01-24
Description:
The regional dust model system LM-MUSCAT-DES was developed in the framework of the SAMUM project. Using the
unique comprehensive data set of near-source dust properties during the 2006SAMUMfield campaign, the performance
of the model system is evaluated for two time periods in May and June 2006. Dust optical thicknesses, number size
distributions and the position of the maximum dust extinction in the vertical profiles agree well with the observations.
However, the spatio-temporal evolution of the dust plumes is not always reproduced due to inaccuracies in the dust
source placement by the model. While simulated winds and dust distributions are well matched for dust events caused
by dry synoptic-scale dynamics, they are often misrepresented when dust emissions are caused by moist convection or
influenced by small-scale topography that is not resolved by the model. In contrast to long-range dust transport, in the
vicinity of source regions the model performance strongly depends on the correct prediction of the exact location of
sources. Insufficiently resolved vertical grid spacing causes the absence of inversions in the model vertical profiles and
likely explains the absence of the observed sharply defined dust layers.
Type:
Article
,
PeerReviewed
Format:
text
