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MADE-in: a new aerosol microphysics submodel for global simulation of insoluble particles and their mixing state
- Source :
- Geoscientific Model Development, Vol 4, Iss 2, Pp 325-355 (2011), Geoscientific model development, 4, 325-355
- Publication Year :
- 2011
- Publisher :
- Copernicus GmbH, 2011.
-
Abstract
- Black carbon (BC) and mineral dust are among the most abundant insoluble aerosol components in the atmosphere. When released, most BC and dust particles are externally mixed with other aerosol species. Through coagulation with particles containing soluble material and condensation of gases, the externally mixed particles may obtain a liquid coating and be transferred into an internal mixture. The mixing state of BC and dust aerosol particles influences their radiative and hygroscopic properties, as well as their ability of forming ice crystals. We introduce the new aerosol microphysics submodel MADE-in, implemented within the ECHAM/MESSy Atmospheric Chemistry global model (EMAC). MADE-in is able to track mass and number concentrations of BC and dust particles in their different mixing states, as well as particles free of BC and dust. MADE-in describes these three classes of particles through a superposition of seven log-normally distributed modes, and predicts the evolution of their size distribution and chemical composition. Six out of the seven modes are mutually interacting, allowing for the transfer of mass and number among them. Separate modes for the different mixing states of BC and dust particles in EMAC/MADE-in allow for explicit simulations of the relevant aging processes, i.e. condensation, coagulation and cloud processing. EMAC/MADE-in has been evaluated with surface and airborne measurements and mostly performs well both in the planetary boundary layer and in the upper troposphere and lowermost stratosphere.
- Subjects :
- mineral dust
Microphysics
Ice crystals
Chemistry
Planetary boundary layer
lcsh:QE1-996.5
Condensation
Mineral dust
Atmospheric sciences
Aerosol
lcsh:Geology
Troposphere
Black carbon
Earth sciences
Atmospheric chemistry
ddc:550
Dynamik der Atmosphäre
Astrophysics::Earth and Planetary Astrophysics
Physics::Atmospheric and Oceanic Physics
Subjects
Details
- ISSN :
- 19919603 and 1991959X
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- Geoscientific Model Development
- Accession number :
- edsair.doi.dedup.....4192e5a08d9dc1eff9848ab3ef49debf