adding option to split io files monthly. useful for large meshes and …

…high output freq

src/gen_modules_clock.F90

@@ -12,6 +12,7 @@ module g_clock
   integer                  :: ndpyr                !number of days in yearnew 
   integer                  :: num_day_in_month(0:1,12)
   character(4)             :: cyearold, cyearnew   !year as character string      
+  character(2)             :: cmonth               !month as character string      
   data num_day_in_month(0,:) /31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31/
   data num_day_in_month(1,:) /31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31/
 
@@ -55,6 +56,7 @@ subroutine clock
        aux2=aux1+num_day_in_month(fleapyear,i)
        if(daynew>aux1 .and. daynew<=aux2) then
           month=i
+          write(cmonth, '(I2.2)') month
           day_in_month=daynew-aux1
           exit
        end if

src/io_meandata.F90

@@ -66,6 +66,7 @@ module io_MEANDATA
   logical, save                  :: vec_autorotate=.FALSE.
   logical, save                  :: lnextGEMS=.FALSE.
   integer, save                  :: nlev_upper=1
+  character(len=1), save         :: filesplit_freq='y'
   type io_entry
         CHARACTER(len=15)        :: id        ='unknown   '
         INTEGER                  :: freq      =0
@@ -134,7 +135,7 @@ subroutine ini_mean_io(ice, dynamics, tracers, partit, mesh)
     type(t_tracer), intent(in)   , target :: tracers
     type(t_dyn)   , intent(in)   , target :: dynamics
     type(t_ice)   , intent(in)   , target :: ice
-    namelist /nml_general / io_listsize, vec_autorotate, lnextGEMS, nlev_upper
+    namelist /nml_general / io_listsize, vec_autorotate, lnextGEMS, nlev_upper, filesplit_freq
     namelist /nml_list    / io_list
 
 #include "associate_part_def.h"
@@ -826,6 +827,7 @@ subroutine create_new_file(entry, ice, dynamics, partit, mesh)
     if (partit%mype/=entry%root_rank) return
     ! create an ocean output file
     write(*,*) 'initializing I/O file for ', trim(entry%name)
+    write(*,*) 'filename will be ', trim(entry%filename)
 
     !___________________________________________________________________________
     ! Create file
@@ -1200,8 +1202,12 @@ subroutine output(istep, ice, dynamics, tracers, partit, mesh)
             entry%thread_running = .false.
 
             ! define filepath
-            filepath = trim(ResultPath)//trim(entry%name)//'.'//trim(runid)//'.'//cyearnew//'.nc'
-
+            if (filesplit_freq=='m') then
+                filepath = trim(ResultPath)//trim(entry%name)//'.'//trim(runid)//'.'//cyearnew//'_'//cmonth//'.nc'
+            else
+                filepath = trim(ResultPath)//trim(entry%name)//'.'//trim(runid)//'.'//cyearnew//'.nc'
+            endif
+
             !___________________________________________________________________
             ! only root rank task does output
             if(partit%mype == entry%root_rank) then