diff --git a/src/netcdf_io/calc_analysis.fd/inc2anl.f90 b/src/netcdf_io/calc_analysis.fd/inc2anl.f90
index 0ec6fa7b..71659690 100644
--- a/src/netcdf_io/calc_analysis.fd/inc2anl.f90
+++ b/src/netcdf_io/calc_analysis.fd/inc2anl.f90
@@ -175,7 +175,7 @@ subroutine add_increment(fcstvar, incvar)
   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
     use vars_calc_analysis, only: fcstncfile, anlncfile, incr_file,&
                                   nlat, nlon, nlev, anlfile, use_nemsio_anl, &
-                                  levpe, mype
+                                  levpe, mype, jedi
     use module_ncio, only: Dataset, read_vardata, write_vardata, &
                                   open_dataset, close_dataset, has_var
     use nemsio_module
@@ -184,7 +184,8 @@ subroutine add_increment(fcstvar, incvar)
     character(7), intent(in) :: fcstvar, incvar
     ! local variables
     real, allocatable, dimension(:,:,:) :: work3d_bg
-    real, allocatable, dimension(:,:) :: work3d_inc
+    real, allocatable, dimension(:,:) :: work3d_inc_gsi
+    real, allocatable, dimension(:,:,:) :: work3d_inc_jedi
     real, allocatable, dimension(:) :: work1d
     integer :: j,jj,k,krev,iret
     type(Dataset) :: incncfile
@@ -196,12 +197,22 @@ subroutine add_increment(fcstvar, incvar)
           call read_vardata(fcstncfile, fcstvar, work3d_bg, nslice=k, slicedim=3)
           ! get increment
           incncfile = open_dataset(incr_file, paropen=.true.)
-          call read_vardata(incncfile, trim(incvar)//"_inc", work3d_inc, nslice=k, slicedim=3)
-          ! add increment to background
-          do j=1,nlat
-             jj=nlat+1-j ! increment is S->N, history files are N->S
-             work3d_bg(:,j,1) = work3d_bg(:,j,1) + work3d_inc(:,jj)
-          end do
+          ! JEDI-derived increments have a time dimension, so read to appropriate array
+          if ( jedi ) then
+             call read_vardata(incncfile, trim(incvar)//"_inc", work3d_inc_jedi, nslice=k, slicedim=3)
+             ! add increment to background
+             do j=1,nlat
+                jj=nlat+1-j ! increment is S->N, history files are N->S
+                work3d_bg(:,j,1) = work3d_bg(:,j,1) + work3d_inc_jedi(:,jj,1)
+             end do
+          else
+             call read_vardata(incncfile, trim(incvar)//"_inc", work3d_inc_gsi, nslice=k, slicedim=3)
+             ! add increment to background
+             do j=1,nlat
+                jj=nlat+1-j ! increment is S->N, history files are N->S
+                work3d_bg(:,j,1) = work3d_bg(:,j,1) + work3d_inc_gsi(:,jj)
+             end do
+          end if
           ! write out analysis to file
           if (use_nemsio_anl) then
             allocate(work1d(nlat*nlon))
@@ -216,7 +227,12 @@ subroutine add_increment(fcstvar, incvar)
         end if
       end do
       ! clean up and close
-      deallocate(work3d_bg, work3d_inc)
+      if ( jedi ) then
+        deallocate(work3d_inc_jedi)
+      else
+        deallocate(work3d_inc_gsi)
+      end if
+      deallocate(work3d_bg)
       call close_dataset(incncfile)
     else 
       write(6,*) fcstvar, ' not in background file, skipping...'
diff --git a/src/netcdf_io/calc_analysis.fd/init_calc_analysis.f90 b/src/netcdf_io/calc_analysis.fd/init_calc_analysis.f90
index bd65f088..dcddab34 100644
--- a/src/netcdf_io/calc_analysis.fd/init_calc_analysis.f90
+++ b/src/netcdf_io/calc_analysis.fd/init_calc_analysis.f90
@@ -14,7 +14,7 @@ subroutine read_nml
     !! read in namelist parameters from
     !! calc_analysis.nml file in same directory
     !! as executable
-    use vars_calc_analysis, only: anal_file, fcst_file, incr_file, use_nemsio_anl, fhr, mype, npes
+    use vars_calc_analysis, only: anal_file, fcst_file, incr_file, use_nemsio_anl, fhr, mype, npes, jedi
     implicit none
     ! local variables to this subroutine
     character(len=500) :: datapath = './'
@@ -24,10 +24,11 @@ subroutine read_nml
     character(len=2) :: hrstr
     integer, parameter :: lunit = 10
     logical :: lexist = .false.
-    namelist /setup/ datapath, analysis_filename, firstguess_filename, increment_filename, fhr, use_nemsio_anl
+    namelist /setup/ datapath, analysis_filename, firstguess_filename, increment_filename, fhr, use_nemsio_anl, jedi
 
     fhr = 6 ! default to 6 hour cycle only
     use_nemsio_anl = .false. ! default to using netCDF for background and analysis
+    jedi = .false. ! default to GSI (not JEDI)
 
     ! read in the namelist
     inquire(file='calc_analysis.nml', exist=lexist)
@@ -64,6 +65,7 @@ subroutine read_nml
       else
         write(6,*) 'writing analysis in netCDF format'
       end if
+      write(6,*) 'Use JEDI format  = ', jedi
     end if
     
   end subroutine read_nml
diff --git a/src/netcdf_io/calc_analysis.fd/vars_calc_analysis.f90 b/src/netcdf_io/calc_analysis.fd/vars_calc_analysis.f90
index c02ffd5a..e9a2e896 100644
--- a/src/netcdf_io/calc_analysis.fd/vars_calc_analysis.f90
+++ b/src/netcdf_io/calc_analysis.fd/vars_calc_analysis.f90
@@ -28,6 +28,7 @@ module vars_calc_analysis
   public :: fhr
   public :: mype, npes
   public :: levpe
+  public :: jedi
 
   character(len=500) :: anal_file, fcst_file, incr_file
   integer, dimension(7) :: idate, jdate
@@ -44,5 +45,6 @@ module vars_calc_analysis
   integer, dimension(7) :: fhrs_pe
   integer :: mype, npes
   integer, allocatable, dimension(:) :: levpe
+  logical :: jedi
 
 end module vars_calc_analysis