There are significant updates to ICON and BCON in the final release of CMAQv5.3. These updates were not included with CMAQv5.3beta because they were still under development. Species mapping has been removed from ICON and BCON in v5.3 to make these programs more independent from CCTM source code.
Apologies for the frustration that this has caused in your testing of the v5.3beta.
I can share the new ICON/BCON programs with you next month when development is complete if you are interested in testing them.
Here is additional information on the updates to ICON and BCON in v5.3:
Several bug fixes have been addressed in the ICON and BCON updates. This includes: (1) compiler info issues in the scripts for ICON/BCON; and (2) ICON/BCON compilation problems in v5.3 resulting from changes in files symbolicly linked to the CCTM/src.
Several enhancements are also included in the ICON/BCON updates: support for nesting from polar stereographic projection grids; support for nesting from time independent gridded files; support vertical interpolation by sigma, Z, and PRES; support for time interpolation from gridded files with coarse time resolution.
The preprocessors have also been simplified to: (1) enable selection of IC/BC type (regrid, profile, patterns) as a runtime option instead of the previous compile-time option; (2) removal of the species mapping - users will need to use the combine utility for species mapping; and (3) removal of parallel processing code from ICON (feature no longer used/needed).
The updates also include a new profile dataset, developed from an annual average Hemispheric CMAQ (HCMAQ) simulation for a marine remote grid cell over the Pacific Ocean (latitude 37oN, longitude -157oW) from a 2016 HCMAQ CMAQv5.3 CB6R3_AE7NVPOA_AQ simulation.
Significance and Impact of v5.3 updates:
ICON and BCON can now be used to generate ICs/BCs from HCMAQ simulations, using vertical and horizontal interpolation methods available in ICON and BCON.
The profile data being release with CMAQv5.3 is different from previous model releases. The profile data included in this release is based on a HCMAQ simulation that used chemical mechanism CB6R3_AE6NVPOA_AQ. ICON and BCON will no longer map profile data species to different chemical mechanisms. Users will need to use the combine utility on ICON/BCON output for species mapping to a different mechanism. Examples will be provided for using the combine utility to map to SAPRC07t and RACM2.