Model Developments

The following developments for CAM-chem (including the Workhorse Model: Mid-Top 93L (80km) and Low-Top 58L (40km) (ne30pg3)) are listed below.

Updates implemented but not validated:

• Chemistry: Troposphere + Stratosphere (TS1.2) (CAM Issue #558)
• New aerosol model: MAM5 (MAM4 + 1 mode for stratospheric sulfate) for all CESM configuration (CAM Issue #663, #664)
• Optional Upper boundary conditions for the low top L58 model  (CAM Issue #533)
• Updated Soil NOx emissions (CTSM Issue #1952)

Updates to be added

• Online DMS emissions based on Online Air-Sea Interface for Soluble  Species (OASISS) -> all CESM compsets (CAM, CAM-chem, WACCM)
• Simple chemistry (for CAM7)  with updated SOA parameterization to support tropospheric aerosol formation (MAM4) (CAM Issue #727)
• HEMCO Emission Component (CAM Issue #560)
• New photolysis scheme (TUV-x) (https://github.com/NCAR/tuv-x)
• New dust emission scheme in CTSM (CAM Issue #651)
• Marine Organic Aerosol Emissions (CAM Issue #531)
• MEGAN3 biogenic emissions (CTSM Issue #1323)