CMAQv5.4 Release Notes: Emissions Updates: Detailed Emissions Scaling Isolation and Diagnostics Module (DESID) - fisidi/CMAQ GitHub Wiki

Restructuring and Miscellaneous updates to the DESID Interface and Processing Features

Ben Murphy, U.S. Environmental Protection Agency
Type of update: Interface Update
Release Version/Date: CMAQv5.4
Description: The DESID Emission Control file has been restructured and several minor updates have been made to the functionality and features available in the DESID interface. Specific details as follows:

• The Emission control file has been streamlined and split to improve maintainability. There are now three control files including CMAQ_Control_Misc.nml which contains input parameters for non-DESID modules like ELMO and the Budget tool, CMAQ_Control_DESID.nml which contains DESID parameters that are independent of chemical mechanism (e.g. region and are size distribution parameters), and CMAQ_Control_DESID_${MECH}.nml which contains mechanism-dependent scaling rules.
• Area normalization - if offline streams are provided in units of area-normalized flux, DESID can now be told to multiply the flux inputs by the area of each grid cell projected to the real area on the Earth's surface, if appropriate.
• A computational inefficiency was discovered that has been corrected for cases when there are more than 200,000 point sources on a single sub-domain block.
• Diagnostic options have been expanded so that users can choose which variables and sources will populate individual output files.
• A bug in the processing of region-based scaling parameters was discovered and revised.
• Variables and comments have been revised for clarity.
• Chemical families have been revised to so they are accessed globally by other modules like ELMO.

References: N/A

Internal PRs: PR #817, PR #809, PR #766, PR #714, PR #709, PR #648, PR #894, PR #638, PR #772