Feature Update	Component	Relevant model	Contibutor(s)	Notes
CMIP7 Forcing	Emissions and external forcing	CESM/CAM-Chem	Benjamin Gaubert, Simone Tilmes, Louisa Emmons, Rebecca Buchholz	https://github.com/NCAR/CMIP7_inputdata_processing
TUVx	Photolysis	CESM/CAM-Chem, WACCM and MUSICA	Doug Kinnison	New photolysis scheme. (https://github.com/NCAR/tuv-x)

Long-term plans

These updates are on our radar, but either are low priority or do not have anyone assigned to work on them.

Feature Update	Component	Relevant model	Notes
Saving 2m ozone	diagnostic	CESM/CAM-Chem, WACCM and MUSICA	Some land component output is necessary for interpolating the surface layer to 2m. Forrest Lacey has performed this previously with MUSICA output.
Saving MDA8 ozone	diagnostic	CESM/CAM-Chem, WACCM and MUSICA	Important for comparing with air quality attainment standards.
Lightning NOx	atmosphere interactive emissions	CESM/CAM-Chem, WACCM and MUSICA	Scale aware production of lightning NOx.
Upper boundary conditions	External forcing		Optional Upper boundary conditions for the low top L58 model created from a WACCM simulation
Marine Organic Aerosol Emissions	emissions	CESM/CAM-Chem, WACCM and MUSICA	Add emissions of marine aerosols (CAM Issue #531).

Previous updates

Previous updates that have happened in the model.

Feature Update	Component	Relevant model	Contibutor(s)	Notes
T4S Chemistry Mechanism	chemistry mechanism	CESM/CAM-Chem, WACCM and MUSICA	Louisa Emmons	Simplified tropospheric and stratospheric chemistry to be used for longer scale runs (e.g. CMIP7).
T3S	chemistry mechanism
HEMCO integration	emissions			Online reading and re-gridding of emissions.
Simple Chemistry	chemistry mechanism	CAM7	Duseong Jo, Louisa Emmons	Simple chemistry (for CAM7) with updated SOA parameterization to support tropospheric aerosol formation (MAM4) (CAM Issue #727)
OASSIS	interactive emissions	CESM/CAM-Chem, WACCM and MUSICA	Siyuan Wang	Online DMS emissions based on Online Air-Sea Interface for Soluble Species (OASISS)