From 137273c94652677dff1beebac1e5511d89ed20e0 Mon Sep 17 00:00:00 2001
From: Erik Kluzek <erik@ucar.edu>
Date: Fri, 21 Aug 2026 18:14:14 -0600
Subject: [PATCH 1/5] Set CO2A with DATM%CPLHIST

---
 cime_config/config_component_cesm.xml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cime_config/config_component_cesm.xml b/cime_config/config_component_cesm.xml
index b5bc98695..47ffe1642 100644
--- a/cime_config/config_component_cesm.xml
+++ b/cime_config/config_component_cesm.xml
@@ -108,6 +108,7 @@
       <value compset="_CAM">CO2A</value>
       <value compset="_DATM">none</value>
       <value compset="_DATM%CPLHIST.+BLOM%ECO">CO2A</value>
+      <value compset="_DATM%CPLHIST_CLM60">CO2A</value>
       <value compset="^OMIP_DATM%IAF.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="^OMIP_DATM%JRA.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="HIST.*_DATM.*_CLM">CO2A</value>

From 69767c5b4246126b4e9a1373957cd1231aedfea4 Mon Sep 17 00:00:00 2001
From: Erik Kluzek <erik@ucar.edu>
Date: Mon, 24 Aug 2026 12:20:05 -0600
Subject: [PATCH 2/5] Do this for any flavor of CLM with DATM%CPLHIST

---
 cime_config/config_component_cesm.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cime_config/config_component_cesm.xml b/cime_config/config_component_cesm.xml
index e25b3f2ac..ad9244a88 100644
--- a/cime_config/config_component_cesm.xml
+++ b/cime_config/config_component_cesm.xml
@@ -108,7 +108,7 @@
       <value compset="_CAM">CO2A</value>
       <value compset="_DATM">none</value>
       <value compset="_DATM%CPLHIST.+BLOM%ECO">CO2A</value>
-      <value compset="_DATM%CPLHIST_CLM60">CO2A</value>
+      <value compset="_DATM%CPLHIST_CLM">CO2A</value>
       <value compset="^OMIP_DATM%IAF.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="^OMIP_DATM%JRA.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="HIST.*_DATM.*_CLM">CO2A</value>

From e4aa62d941c340baa12146bfc9737f51f6626442 Mon Sep 17 00:00:00 2001
From: Erik Kluzek <erik@ucar.edu>
Date: Tue, 25 Aug 2026 10:45:21 -0600
Subject: [PATCH 3/5] Compset Reg-Exp robust request from review

---
 cime_config/config_component_cesm.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cime_config/config_component_cesm.xml b/cime_config/config_component_cesm.xml
index ad9244a88..f464867b7 100644
--- a/cime_config/config_component_cesm.xml
+++ b/cime_config/config_component_cesm.xml
@@ -108,7 +108,7 @@
       <value compset="_CAM">CO2A</value>
       <value compset="_DATM">none</value>
       <value compset="_DATM%CPLHIST.+BLOM%ECO">CO2A</value>
-      <value compset="_DATM%CPLHIST_CLM">CO2A</value>
+      <value compset="DATM%CPLHIST.*_CLM">CO2A</value>
       <value compset="^OMIP_DATM%IAF.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="^OMIP_DATM%JRA.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="HIST.*_DATM.*_CLM">CO2A</value>

From 408abc1b2c5253e23fc3090a781c657db970c098 Mon Sep 17 00:00:00 2001
From: Erik Kluzek <ekluzek@users.noreply.github.com>
Date: Thu, 3 Sep 2026 16:49:19 -0600
Subject: [PATCH 4/5] Update cime_config/config_component_cesm.xml

Suggestion from code review

Co-authored-by: Bill Sacks <sacks@ucar.edu>
---
 cime_config/config_component_cesm.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cime_config/config_component_cesm.xml b/cime_config/config_component_cesm.xml
index f464867b7..ce4eb38c3 100644
--- a/cime_config/config_component_cesm.xml
+++ b/cime_config/config_component_cesm.xml
@@ -108,7 +108,7 @@
       <value compset="_CAM">CO2A</value>
       <value compset="_DATM">none</value>
       <value compset="_DATM%CPLHIST.+BLOM%ECO">CO2A</value>
-      <value compset="DATM%CPLHIST.*_CLM">CO2A</value>
+      <value compset="_DATM%CPLHIST.*_CLM">CO2A</value>
       <value compset="^OMIP_DATM%IAF.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="^OMIP_DATM%JRA.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="HIST.*_DATM.*_CLM">CO2A</value>

From 2b7c96f473c41a22a3f605eef575b18f6de483b6 Mon Sep 17 00:00:00 2001
From: Erik Kluzek <erik@ucar.edu>
Date: Fri, 4 Sep 2026 02:29:11 -0600
Subject: [PATCH 5/5] To match DATM in CDEPS make CCSM_BGC==CO2A for
 DATM%CPLHIST independent of what models take part

---
 cime_config/config_component_cesm.xml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/cime_config/config_component_cesm.xml b/cime_config/config_component_cesm.xml
index ce4eb38c3..9f2b21707 100644
--- a/cime_config/config_component_cesm.xml
+++ b/cime_config/config_component_cesm.xml
@@ -107,8 +107,7 @@
     <values match="last">
       <value compset="_CAM">CO2A</value>
       <value compset="_DATM">none</value>
-      <value compset="_DATM%CPLHIST.+BLOM%ECO">CO2A</value>
-      <value compset="_DATM%CPLHIST.*_CLM">CO2A</value>
+      <value compset="_DATM%CPLHIST">CO2A</value>
       <value compset="^OMIP_DATM%IAF.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="^OMIP_DATM%JRA.*_MOM6%[^_]*MARBL">CO2A</value>
       <value compset="HIST.*_DATM.*_CLM">CO2A</value>