[institut] Predavanje: dr Luka Ilić, 21. 8. 2025. u 12 časova

[Maja Kuzmanoski]

Poštovane koleginice i kolege,

Sa zadovoljstvom vas pozivamo na predavanje koje će održati dr Luka Ilić 
(Barcelona Supercomputing Center, Spain) u četvrtak 21. avgusta u 12 h, 
u sali "Zvonko Marić" Instituta za fiziku u Beogradu.

Četvrtak, 21. avgust u 12 časova, Institut za fiziku u Beogradu, sala 
"Zvonko Marić"

dr Luka Ilić, Barcelona Supercomputing Center, Spain

Impact of Dust Mineralogy Representation on Modeled Optical Properties 
and Radiative Effects Using MONARCH

ABSTRACT
Mineral dust from arid regions is a major contributor to the global 
aerosol burden and a key source of uncertainty in weather and climate 
models due to its radiative effects. These effects, particularly in the 
shortwave, depend strongly on particle size and mineral composition, 
especially the presence of iron oxide–carrying minerals. Many global 
dust models assume fixed or homogeneous source mineralogy, often 
neglecting size-dependent variability. This is further complicated by 
uncertainties in source datasets and the computational cost of explicit 
composition modeling.
We use the MONARCH (Multiscale Online Non-hydrostatic AtmospheRe 
CHemistry) model, coupled with RRTMG, to simulate global dust transport 
and radiative effects under different mineralogical assumptions. MONARCH 
resolves individual mineral tracers and uses the Maxwell-Garnett 
approach to compute optical properties of host particles with iron oxide 
inclusions. The set of numerical experiments covers varying mineralogy 
assumptions and a set of soil mineralogy atlases, including the new 
high-resolution EMIT product. Results from one-year simulations show 
that explicit mineralogy introduces more variability in single 
scattering albedo (SSA). Differences in assumptions lead to differences 
in estimates in regional and global direct radiative effect (DRE).

-- 
Maja Kuzmanoski
Environmental Physics Laboratory
Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
http://www.envpl.ipb.ac.rs
http://www.ipb.ac.rs/