From 3e79994901c6545d2b8341745a5088ace0958835 Mon Sep 17 00:00:00 2001
From: Erik Kluzek <erik@ucar.edu>
Date: Wed, 4 Mar 2026 15:11:20 -0700
Subject: [PATCH 1/2] Fix for #3799 so that lnd_tuning_mode can be used for the
 paramfile

---
 bld/CLMBuildNamelist.pm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/bld/CLMBuildNamelist.pm b/bld/CLMBuildNamelist.pm
index e2d7ee06bc..cbad8fb9e6 100755
--- a/bld/CLMBuildNamelist.pm
+++ b/bld/CLMBuildNamelist.pm
@@ -2269,6 +2269,7 @@ sub setup_logic_params_file {
 
   add_default($opts, $nl_flags->{'inputdata_rootdir'}, $definition, $defaults, $nl, 'paramfile',
               'phys'=>$nl_flags->{'phys'},
+              'lnd_tuning_mode'=>$nl_flags->{'lnd_tuning_mode'},
               'use_flexibleCN'=>$nl_flags->{'use_flexibleCN'} );
 }
 

From 220a9b179be2780832938e34ec80ef095d80286e Mon Sep 17 00:00:00 2001
From: Erik Kluzek <erik@ucar.edu>
Date: Wed, 11 Mar 2026 20:29:26 -0600
Subject: [PATCH 2/2] Here's one way to get DATM_CO2_TSERIES settings just set
 for certain CLM compsets

---
 cime_config/config_component.xml |  4 ++++
 cime_config/config_compsets.xml  | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/cime_config/config_component.xml b/cime_config/config_component.xml
index 366b504d3e..eafe56d4d1 100644
--- a/cime_config/config_component.xml
+++ b/cime_config/config_component.xml
@@ -304,6 +304,10 @@ Caveats:
       <value compset="_BGC%BPRP"   >prognostic</value>
       <value compset="HIST.*_DATM" >diagnostic</value>
       <value compset="SSP.*_DATM"  >diagnostic</value>
+      <value compset="1850_DATM[^_]*_CLM60">diagnostic</value>
+      <value compset="2000_DATM[^_]*_CLM60">diagnostic</value>
+      <value compset="2010_DATM[^_]*_CLM60">diagnostic</value>
+      <value compset="^1850_DATM[^_]*_CLM[^_]*NOANTHRO" >constant</value>
     </values>
     <group>run_component_ctsm</group>
     <file>env_run.xml</file>
diff --git a/cime_config/config_compsets.xml b/cime_config/config_compsets.xml
index e0c7f65b31..73465d78cc 100644
--- a/cime_config/config_compsets.xml
+++ b/cime_config/config_compsets.xml
@@ -777,6 +777,16 @@
   <!-- changes to driver xml variables - in case of a tie in the values matches the last match is taken -->
 
   <entries>
+
+    <entry id="DATM_CO2_TSERIES">
+      <values>
+        <value compset="1850_DATM[^_]*_CLM60">cmip7_20tr</value>
+        <value compset="2000_DATM[^_]*_CLM60">cmip7_20tr</value>
+        <value compset="HIST_DATM[^_]*_CLM60">cmip7_20tr</value>
+        <value compset="^1850_DATM[^_]*_CLM[^_]*NOANTHRO" >none</value>
+      </values>
+    </entry>
+
     <entry id="RUN_STARTDATE">
       <values>
 	<value compset="HIST_"			  >1850-01-01</value>