CAMx has one optional input 2-D top boundary conditions file contains gridded and time-dependent concentration fields above the top of the master grid boundary. Top boundary conditions improve the
characterization of chemicals entering vertically across the model top, which is particularly
important for common stratospheric constituents such as ozone and nitrogen oxides according to some applications of CAMx. My top conditions-related questions are
- How CMAQ deal with exchanges between the top model layer and the
environment above the model?
- Why CMAQ does not need top conditions? Is that because CMAQ keep the constant concentrations as initial conditions provided?
- How to create top conditions for CAMx using seasonal average hemispheric CMAQ output.