From 41387bd8c3cb43656a837e25dd99ee14abc1b75b Mon Sep 17 00:00:00 2001
From: Cory Martin <cory.r.martin@noaa.gov>
Date: Tue, 16 Jan 2024 11:24:55 -0500
Subject: [PATCH] go with DRPCG

---
 parm/aero/variational/3dvar_fgat_gfs_aero.yaml            | 2 +-
 parm/aero/variational/3dvar_gfs_aero.yaml                 | 2 +-
 parm/atm/variational/{3dvar_pcg.yaml => 3dvar_drpcg.yaml} | 2 +-
 test/atm/global-workflow/config.atmanl                    | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)
 rename parm/atm/variational/{3dvar_pcg.yaml => 3dvar_drpcg.yaml} (99%)

diff --git a/parm/aero/variational/3dvar_fgat_gfs_aero.yaml b/parm/aero/variational/3dvar_fgat_gfs_aero.yaml
index 5b61ca235..2252493d8 100644
--- a/parm/aero/variational/3dvar_fgat_gfs_aero.yaml
+++ b/parm/aero/variational/3dvar_fgat_gfs_aero.yaml
@@ -49,7 +49,7 @@ cost function:
   observations: !INC ${OBS_LIST}
 variational:
   minimizer:
-    algorithm: PCG
+    algorithm: DRPCG
   iterations:
   - ninner: 35
     gradient norm reduction: 1e-10
diff --git a/parm/aero/variational/3dvar_gfs_aero.yaml b/parm/aero/variational/3dvar_gfs_aero.yaml
index 101eb5949..75371080f 100644
--- a/parm/aero/variational/3dvar_gfs_aero.yaml
+++ b/parm/aero/variational/3dvar_gfs_aero.yaml
@@ -40,7 +40,7 @@ cost function:
   observations: !INC ${OBS_LIST}
 variational:
   minimizer:
-    algorithm: PCG
+    algorithm: DRPCG
   iterations:
   - ninner: 35
     gradient norm reduction: 1e-10
diff --git a/parm/atm/variational/3dvar_pcg.yaml b/parm/atm/variational/3dvar_drpcg.yaml
similarity index 99%
rename from parm/atm/variational/3dvar_pcg.yaml
rename to parm/atm/variational/3dvar_drpcg.yaml
index e34f81fa7..9464c7489 100644
--- a/parm/atm/variational/3dvar_pcg.yaml
+++ b/parm/atm/variational/3dvar_drpcg.yaml
@@ -33,7 +33,7 @@ cost function:
   observations: !INC ${OBS_LIST}
 variational:
   minimizer:
-    algorithm: PCG
+    algorithm: DRPCG
   iterations:
   - ninner: 2
     gradient norm reduction: 1e-10
diff --git a/test/atm/global-workflow/config.atmanl b/test/atm/global-workflow/config.atmanl
index 1d91ac0e8..a2660e055 100755
--- a/test/atm/global-workflow/config.atmanl
+++ b/test/atm/global-workflow/config.atmanl
@@ -8,7 +8,7 @@ echo "BEGIN: config.atmanl"
 export CASE_ANL="@ATMRES_ANL@"
 export OBS_YAML_DIR=${HOMEgfs}/sorc/gdas.cd/parm/atm/obs/config/
 export OBS_LIST=@OBS_LIST@
-export ATMVARYAML=${HOMEgfs}/sorc/gdas.cd/parm/atm/variational/3dvar_pcg.yaml
+export ATMVARYAML=${HOMEgfs}/sorc/gdas.cd/parm/atm/variational/3dvar_drpcg.yaml
 export STATICB_TYPE="identity"
 export BERROR_YAML=${HOMEgfs}/sorc/gdas.cd/parm/atm/berror/staticb_${STATICB_TYPE}.yaml
 export INTERP_METHOD='barycentric'