If you are using CMAQv5.3, then this issue contains a discussion about the error, and the best fix is to upgrade to CMAQv5.3.1. Incorrect timestepping for elevated point source emissions
If you are using CMAQv5.3, then this issue contains a discussion about the error, and the best fix is to upgrade to CMAQv5.3.1. Incorrect timestepping for elevated point source emissions