MERRA2 diagnosed number concentrations of ice friendly (NIFA) and liquid friendly aerosols (NWFA).

[AnningCheng-NOAA]

Description

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number concentrations of ice friendly (NIFA) and liquid friendly aerosols (NWFA) are forecasted in Thompson microphysics. It is taken about 10% more computation time and becomes unrealistically large with long integration

Solution

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MERRA2 climatological aerosols are used to calculate number concentrations of ice friendly (NIFA) and liquid friendly aerosols (NWFA). So IN and CCN can be activated using aerosol. This approach is about 10% less expensive than the forecast approach. The indirect interaction of aerosol and clouds is expected to happen.

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Related to

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• required to support noaa-emc/nems/issues/<issue_number>
• needed by noaa-emc/fv3atm/pull/<439>
• needed by Coupling Merra2 aerosol climatology and GOCART forecasted aerosol with Thompson microphysics NCAR/ccpp-physics#720
• needed by MERRA2 diagnosed number concentrations of ice friendly (NIFA) and liquid friendly aerosols (NWFA) #951