Secondary organic aerosols
The restart_gprod_aprod.YYYYMMDDhh file
The restart_gprod_aprod.YYYYMMDDhh files have been introduced in v7-04-11. They are required for GEOS-Chem full-chemistry and/or offline aerosol simulations that use the secondary organic aerosol tracers.
Havala Olson Taylor Pye (firstname.lastname@example.org) wrote:
- Before [the restart_gprod_aprod.YYYYMMDDhh files were introduced in v7-04-11], if you started a run from a restart file (even one from a run that was well initialized), the global SOA burden would drop dramatically in the first time step to about half of what the restart file said it should be. The GPROD/APROD values were not being stored. These values relate to how much gas or aerosol phase product belongs to each hydrocarbon/oxidant combination.
- SOA is somewhat unique in that in the model, it can evaporate and exist in the same chemical form (SOG). I didn't notice a dip in the burden for SO4, NIT (gas phase form would be HNO3), or NH4 (gas phase form would be NH3).
Note that the restart_gprod_aprod.YYYYMMDDhh are strict in their usage. They cannot change name, and the dates in the filename, of the simulation, and in the data block headers inside the file, must all be the same. See the following note about renaming and regridding restart_gprod_aprod.YYYYMMDDhh files.