Release date: 18 May 2022 ## Added - New integrators - feuler.f90 - New C-I tests - ros_minver - ros_upcase - Added scripts to run C-I tests manually (for development/debugging) - Brought updates for GEOS-Chem into the main line of development - Added #MINVERSION switch to force KPP to stop unless a minimum version is used - Added #UPPERCASEF90 to generate F90 code with the .F90 suffixes - Removed EQUIVALENCE statements from F90-generated code; VAR and FIX now point to C witihin integrators. This is to ensure thread-safe operation when using KPP-generated code in an OpenMP parallel environment. - Bug fixes: - Make sure to inline parameter "sp" into the _Global.F90 file when the "#DOUBLE off" option is used. ## Changed - Code updates - Rewrote code to remove compiler warnings - Fortran-90 makefiles now use GFORTRAN as the default compiler option - Added ReadTheDocs output - Updated top-of-file comment headers to point to the KPP Github site and to acknowledge new authors - Routine Fun() now returns optional arguments Aout and Vdotout - Updates for building on MacOS - Reduce size of MAX_EQN and MAX_SPECIES to get KPP to run within 65532 kb of stack memory

Please see the KPP Github repository at https://github.com/KineticPreProcessor/KPP and our comprehensive documentation at https://kpp.readthedocs.io