Added

• FMS2_IO: Adds header_buffer_val to the fms2io namelist which sets the netcdf header size in bytes. The default value is 16kb
• FMS2_IO: Adds netcdf_default_format to the fms2io namelist which allows the user to change the netcdf file type. The default value is 64bit.
• FMS2_IO: Adds support to read netcdf string global attributes
• FMS2_IO: Adds an optional argument to open_file, dont_add_res_to_filename, which indicates that the filename should not be modified (default adds .res to restart file name)
• FMS2_IO: Modifies the register_variable_attribute and register_global_attribute interfaces by adding str_len as an argument. This is a workaround to get fms2io to work with PGI because they don't support class () with len=.
• FMS2_IO: Adds unit test that tests write_data and read_data when using a domain with a mask table
• FMS2_IO: Adds fms2io’s version of get_mosaic_tile_grid
• MPP_IO: Adds -Duse_mpp_io compile option for data_override, interpolator, amip_interp, diag_manager, topography, and xgrid to select using mpp_io instead of fms2_io
• MPP_INIT: Adds unit tests for routines/functions that are called in mpp_init
• CMAKE: A cmake build system has been added with a CI build using cmake

Changed

• FMS2_IO: Improves performance of previous release by gathering the domain decomposed data into one global buffer and doing one write rather than doing multiple reads
• DATA_OVERRIDE: Changes line in time_interp_external2 to enable 3D overrides

Fixed

• DATA_OVERRIDE[2]: Fixes a crash when doing ongrid data_override calls with a domain with halos
• DIAG_MANAGER[2]: Fixes an issue where time_bnds were written incorrectly for the last time stamp
• DIAG_MANAGER: Regional diagnostics with a mask table now work
• FMS2_IO: Unit test includes fms2io_init call to improve functionality
• MPP: BOZ literals that are used in variable declaration are converted to integers using the int() function.
• MPP_DOMAINS2: Fixed unit test
• FMS_IO: Changes the logic in get_tile_string to fix bug where tile numbers 9 and 99 produce an inappropriate error

Known Issues

• Users must compile with the flag “-fallow-argument-mismatch” when compiling with GCC 10 (this will be addressed in 2020.04)
• Fms2io: The fms2io unit tests crash with newer versions of netcdf (4.7.4) because netcdf only supports writing int64 variable with NC_NETCDF4 file types
• Mpp_io: bug reading *_bnds causes values to be calculated incorrectly when netcdf files have null characters in the string attributes