| Summary: | First release of version 3.0 of the Energy Exascale Earth System Model Default grid configuration for the low-resolution configuration of v3 is a "trigrid" consisting of Atmosphere on ne30pg2 (physics grid). Same as v2. Ocean, sea-ice on new Icosahedral 30 km mesh with Ice Shelf Cavities (IcoswISC30E3r5). New in v3 Land and river run-off on a common 1/2 deg lat-lon grid (r05). New default in v3. The following compsets are supported at the low-resolution detailed above: F1850, F1950, F2010, F20TR, WCYCL1850, WCYCL1950, and WCYCL20TR The atmospheric component remains EAM. Its vertical resolution has been increased from 72 layers in version 2 to 80 layers in version 3. Atmospheric physics have had significant additions and changes since version 2: Added interactive gas chemistry in stratosphere and troposphere with 32 transported species - the UCI chemistry mechanism Update from MAM4 to MAM5. Additional size mode for prognostic treatment of stratospheric sulfate aerosol from explosive volcanic eruptions Added explicit representation of secondary organic aerosols (SOA) sources from multigenerational chemical oxidation of biogenic, anthropogenic, biomass burning volatile organic compounds and chemical sinks including photolysis and fragmentation Improved aerosol wet removal processes to reduce the overestimation of aerosols and thus aerosol forcing Improved numerical coupling of aerosol emission, vertical mixing and dry deposition Re-tuned Dimethyl sulfide (DMS) emission, number of monolayers for black carbon (BC) aging, and hygroscopicity of particulate organic matter (kPOM) to improve the representation of aerosol direct forcing. Added a new dust emission scheme to enable the time-varying soil erodibility for dust mobilization and to include high-latitude dust sources Added Predicted Particle Properties (P3) for stratiform clouds to improve representation of ice microphysical processes and aerosol-cloud interactions Added sophisticated cloud microphysics for convective clouds, which allows aerosols to impact ...
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