Modeling

Multi-Scale Chemistry Modeling (MUSICA)

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.

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

The MUSICA Tutorial has been postponed. For more information and sign up for updates please see the Tutorial website.  

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

example MUSICAv0 result

MUSICA Version 0 represents a regionally refined version of the CAM-chem global chemistry climate model. This model development takes advantage of recent advancements in CAM that uses the Spectral Element dynamical core (which is an unstructured grid mesh based on a cubed sphere) which now allows for regional refinement (CAM SE RR). Initial MUSICAv0 simulations use a grid mesh with global horizontal resolution of 1˚ that refines to 0.125˚ (~14km) over the conterminous U.S. (CONUS). The figure compares surface ozone for August 2013 simulated at uniform global 1˚ horizontal resolution (left) with a MUSICAv0 global 1˚ simulation that refines to 14 km resolution over CONUS (right). Credits: Rebecca Schwantes, Forrest Lacey, Simone Tilmes, Louisa Emmons.

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ACOM | Atmospheric Chemistry Observations & Modeling