Multi-Scale Infrastructure for Chemistry Modeling (MUSICA)

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The Atmospheric Chemistry Observations and Modeling (ACOM) Laboratory at NCAR together with the atmospheric chemistry community is developing a new community modeling infrastructure. MUSICA – the Multi-Scale Infrastructure for Chemistry and Aerosols – will become a computationally feasible global modeling framework that allows for the simulation of large-scale atmospheric phenomena, while still resolving chemistry at emission and exposure relevant scales (down to ~4 km within the next 5 years). MUSICA will eventually replace and extend the current separate community chemistry modeling efforts at NCAR (e.g. WACCM, CAM-Chem, WRF-Chem), paralleling other activities at NCAR to streamline and unify model development.

Are you looking for the MuSICA ecosystem model? The INRAE Multi-layer Simulator of the Interactions between vegetation Canopies and the Atmosphere (MuSICA) is primarily an ecosystem model focused on exchange between the atmosphere and terrestrial vegetation. Please click on the link to reach the INRAE MuSICA site. 



MUSICA vs WRF-Chem - a comparison.

A monthly MUSICA Tutorial Series started November 12, 2021 - see the Tutorial Website for more information. 

MUSICAv0 with regional refinement over the conterminous U.S. is now available in CESM2.2. More information on MUSICAv0 is on the MUSICA-V0 webpage.  Community Simulation: The standard configuration of MUSICAv0 has been run for 2012-2013 and the output is available for download from the DASH repository.

Learn more about MUSICA Working Groups on the MUSICA Governance page.

The MUSICA Kick-Off meeting was held at NCAR from 21-22 May, 2019. Presentations from this meeting are available from the meeting website.


The MUSICAv0 description and evaluation paper (and Supplement) by Becky Schwantes is in press (May 2022) in the Journal of Advances in Modeling Earth Systems (JAMES) [DOI: 10.1029/2021MS002889].
"Effects of Grid Resolution and Emission Inventory on Urban Air Quality Simulation With the Multi-Scale Infrastructure for Chemistry and Aerosols (MUSICA) Version 0" by Duseong Jo submitted to JAMES.
The MUSICA vision paper was published in the Bulletin of the American Meteorological Society (BAMS, Oct 1, 2020).





ACOM | Atmospheric Chemistry Observations & Modeling