diff --git a/datm/cime_config/config_component.xml b/datm/cime_config/config_component.xml
index 35bf01b6..0adc94f6 100644
--- a/datm/cime_config/config_component.xml
+++ b/datm/cime_config/config_component.xml
@@ -165,7 +165,7 @@
 
   <entry id="DATM_CO2_TSERIES">
     <type>char</type>
-    <valid_values>none,20tr,20tr.latbnd,omip.iaf,omip.jra,SSP1-1.9,SSP1-2.6,SSP2-4.5,SSP3-7.0,SSP4-3.4,SSP4-6.0,SSP5-3.4,SSP5-8.5,SSP1-1.9.latbnd,SSP1-2.6.latbnd,SSP2-4.5.latbnd,SSP3-7.0.latbnd,SSP4-3.4.latbnd,SSP4-6.0.latbnd,SSP5-3.4.latbnd,SSP5-8.5.latbnd</valid_values>
+    <valid_values>none,cmip6_20tr,cmip7_20tr,omip.iaf,omip.jra,SSP1-1.9,SSP1-2.6,SSP2-4.5,SSP3-7.0,SSP4-3.4,SSP4-6.0,SSP5-3.4,SSP5-8.5</valid_values>
     <default_value>none</default_value>
     <values match="last">
       <value compset="^SSP119_">SSP1-1.9</value>
@@ -176,8 +176,8 @@
       <value compset="^SSP460_">SSP4-6.0</value>
       <value compset="^SSP534_">SSP5-3.4</value>
       <value compset="^SSP585_">SSP5-8.5</value>
-      <value compset="^HIST[CE]?_"   >20tr</value>
-      <value compset="^20TR"   >20tr</value>
+      <value compset="^HIST[CE]?_">cmip6_20tr</value>
+      <value compset="^20TR"   >cmip6_20tr</value>
       <value compset="^OMIP_DATM%IAF.*_POP2%[^_]*ECO">omip.iaf</value>
       <value compset="^OMIP_DATM%JRA.*_POP2%[^_]*ECO">omip.jra</value>
     </values>
diff --git a/datm/cime_config/stream_definition_datm.xml b/datm/cime_config/stream_definition_datm.xml
index 5ec085c1..0e52cc38 100644
--- a/datm/cime_config/stream_definition_datm.xml
+++ b/datm/cime_config/stream_definition_datm.xml
@@ -145,8 +145,8 @@
   optional stream co2tseries (turned on and stream specified by xml variable DATM_CO2_TSERIES)
   - DATM_CO2_TSERIES is set by the 4 character time prefix in config_component.xml
   ========================
-  co2tseries.20tr
-  co2tseries.20tr.latbnd
+  co2tseries.cmip6_20tr
+  co2tseries.cmip7_20tr
   co2tseries.omip.iaf
   co2tseries.omip.jra
   co2tseries.SSP1-1.9
@@ -157,14 +157,6 @@
   co2tseries.SSP4-6.0
   co2tseries.SSP5-3.4
   co2tseries.SSP5-8.5
-  co2tseries.SSP1-1.9.latbnd
-  co2tseries.SSP1-2.6.latbnd
-  co2tseries.SSP2-4.5.latbnd
-  co2tseries.SSP3-7.0.latbnd
-  co2tseries.SSP4-3.4.latbnd
-  co2tseries.SSP4-6.0.latbnd
-  co2tseries.SSP5-3.4.latbnd
-  co2tseries.SSP5-8.5.latbnd
 
   ========================
   optional stream presaero (turned on and stream specified by xml variable DATM_PRESAERO)
@@ -3646,7 +3638,7 @@
 
   <!-- currently all co2 time series are single point and have no mesh -->
 
-  <stream_entry name="co2tseries.20tr">
+  <stream_entry name="co2tseries.cmip6_20tr">
     <stream_meshfile>
       <meshfile>none</meshfile>
     </stream_meshfile>
@@ -3677,24 +3669,24 @@
     <stream_readmode>single</stream_readmode>
   </stream_entry>
 
-  <stream_entry name="co2tseries.omip.iaf">
+  <stream_entry name="co2tseries.cmip7_20tr">
     <stream_meshfile>
       <meshfile>none</meshfile>
     </stream_meshfile>
     <stream_datafiles>
-      <file>$DIN_LOC_ROOT/atm/datm7/CO2/fco2_datm_global_ssp585_simyr_1750-2020_CMIP6_c200324.nc</file>
+      <file>$DIN_LOC_ROOT/atm/datm7/CO2/co2_input4MIPs_GHGConcentrations_CMIP_CR-CMIP-1-0-0_gm_1750-2022_CMIP7_c20250228.nc</file>
     </stream_datafiles>
     <stream_datavars>
-      <var>CO2 Sa_co2diag</var>
+      <var>co2   Sa_co2diag</var>
     </stream_datavars>
     <stream_lev_dimname>null</stream_lev_dimname>
     <stream_mapalgo>
       <mapalgo>none</mapalgo>
     </stream_mapalgo>
     <stream_vectors>null</stream_vectors>
-    <stream_year_align>213</stream_year_align> <!-- 6*(2009-1948+1)-(2009-1850) -->
-    <stream_year_first>1850</stream_year_first>
-    <stream_year_last>2010</stream_year_last>
+    <stream_year_align>1750</stream_year_align>
+    <stream_year_first>1750</stream_year_first>
+    <stream_year_last>2022</stream_year_last>
     <stream_offset>0</stream_offset>
     <stream_tintalgo>
       <tintalgo>linear</tintalgo>
@@ -3708,7 +3700,7 @@
     <stream_readmode>single</stream_readmode>
   </stream_entry>
 
-  <stream_entry name="co2tseries.omip.jra">
+  <stream_entry name="co2tseries.omip.iaf">
     <stream_meshfile>
       <meshfile>none</meshfile>
     </stream_meshfile>
@@ -3723,226 +3715,9 @@
       <mapalgo>none</mapalgo>
     </stream_mapalgo>
     <stream_vectors>null</stream_vectors>
-    <stream_year_align>198</stream_year_align> <!-- 6*(2018-1958+1)-(2018-1850) -->
+    <stream_year_align>213</stream_year_align> <!-- 6*(2009-1948+1)-(2009-1850) -->
     <stream_year_first>1850</stream_year_first>
-    <stream_year_last>2019</stream_year_last>
-    <stream_offset>0</stream_offset>
-    <stream_tintalgo>
-      <tintalgo>linear</tintalgo>
-    </stream_tintalgo>
-    <stream_taxmode>
-      <taxmode>extend</taxmode>
-    </stream_taxmode>
-    <stream_dtlimit>
-      <dtlimit>1.e30</dtlimit>
-    </stream_dtlimit>
-    <stream_readmode>single</stream_readmode>
-  </stream_entry>
-
-  <stream_entry name="co2tseries.SSP1-1.9.latbnd">
-    <stream_meshfile>
-      <meshfile>none</meshfile>
-    </stream_meshfile>
-    <stream_datafiles>
-      <file>$DIN_LOC_ROOT/atm/datm7/CO2/fco2_datm_lat-bandsSSP1-1.9_simyr_2014-2500_CMIP6_c190514.nc</file>
-    </stream_datafiles>
-    <stream_datavars>
-      <var>CO2   Sa_co2diag</var>
-    </stream_datavars>
-    <stream_lev_dimname>null</stream_lev_dimname>
-    <stream_mapalgo>
-      <mapalgo>none</mapalgo>
-    </stream_mapalgo>
-    <stream_vectors>null</stream_vectors>
-    <stream_year_align>2015</stream_year_align>
-    <stream_year_first>2015</stream_year_first>
-    <stream_year_last>2500</stream_year_last>
-    <stream_offset>0</stream_offset>
-    <stream_tintalgo>
-      <tintalgo>linear</tintalgo>
-    </stream_tintalgo>
-    <stream_taxmode>
-      <taxmode>extend</taxmode>
-    </stream_taxmode>
-    <stream_dtlimit>
-      <dtlimit>1.e30</dtlimit>
-    </stream_dtlimit>
-    <stream_readmode>single</stream_readmode>
-  </stream_entry>
-
-  <stream_entry name="co2tseries.SSP1-2.6.latbnd">
-    <stream_meshfile>
-      <meshfile>none</meshfile>
-    </stream_meshfile>
-    <stream_datafiles>
-      <file>$DIN_LOC_ROOT/atm/datm7/CO2/fco2_datm_lat-bandsSSP1-2.6__simyr_2014-2500_CMIP6_c190506.nc</file>
-    </stream_datafiles>
-    <stream_datavars>
-      <var>CO2   Sa_co2diag</var>
-    </stream_datavars>
-    <stream_lev_dimname>null</stream_lev_dimname>
-    <stream_mapalgo>
-      <mapalgo>none</mapalgo>
-    </stream_mapalgo>
-    <stream_vectors>null</stream_vectors>
-    <stream_year_align>2015</stream_year_align>
-    <stream_year_first>2015</stream_year_first>
-    <stream_year_last>2500</stream_year_last>
-    <stream_offset>0</stream_offset>
-    <stream_tintalgo>
-      <tintalgo>linear</tintalgo>
-    </stream_tintalgo>
-    <stream_taxmode>
-      <taxmode>extend</taxmode>
-    </stream_taxmode>
-    <stream_dtlimit>
-      <dtlimit>1.e30</dtlimit>
-    </stream_dtlimit>
-    <stream_readmode>single</stream_readmode>
-  </stream_entry>
-
-  <stream_entry name="co2tseries.SSP2-4.5.latbnd">
-    <stream_meshfile>
-      <meshfile>none</meshfile>
-    </stream_meshfile>
-    <stream_datafiles>
-      <file>$DIN_LOC_ROOT/atm/datm7/CO2/fco2_datm_lat-bandsSSP2-4.5__simyr_2014-2500_CMIP6_c190506.nc</file>
-    </stream_datafiles>
-    <stream_datavars>
-      <var>CO2   Sa_co2diag</var>
-    </stream_datavars>
-    <stream_lev_dimname>null</stream_lev_dimname>
-    <stream_mapalgo>
-      <mapalgo>none</mapalgo>
-    </stream_mapalgo>
-    <stream_vectors>null</stream_vectors>
-    <stream_year_align>2015</stream_year_align>
-    <stream_year_first>2015</stream_year_first>
-    <stream_year_last>2500</stream_year_last>
-    <stream_offset>0</stream_offset>
-    <stream_tintalgo>
-      <tintalgo>linear</tintalgo>
-    </stream_tintalgo>
-    <stream_taxmode>
-      <taxmode>extend</taxmode>
-    </stream_taxmode>
-    <stream_dtlimit>
-      <dtlimit>1.e30</dtlimit>
-    </stream_dtlimit>
-    <stream_readmode>single</stream_readmode>
-  </stream_entry>
-
-  <stream_entry name="co2tseries.SSP3-7.0.latbnd">
-    <stream_meshfile>
-      <meshfile>none</meshfile>
-    </stream_meshfile>
-    <stream_datafiles>
-      <file>$DIN_LOC_ROOT/atm/datm7/CO2/co2_datm_lat-bandsSSP3-7.0__simyr_2014-2500_CMIP6_c190506.nc</file>
-    </stream_datafiles>
-    <stream_datavars>
-      <var>CO2   Sa_co2diag</var>
-    </stream_datavars>
-    <stream_lev_dimname>null</stream_lev_dimname>
-    <stream_mapalgo>
-      <mapalgo>none</mapalgo>
-    </stream_mapalgo>
-    <stream_vectors>null</stream_vectors>
-    <stream_year_align>2015</stream_year_align>
-    <stream_year_first>2015</stream_year_first>
-    <stream_year_last>2500</stream_year_last>
-    <stream_offset>0</stream_offset>
-    <stream_tintalgo>
-      <tintalgo>linear</tintalgo>
-    </stream_tintalgo>
-    <stream_taxmode>
-      <taxmode>extend</taxmode>
-    </stream_taxmode>
-    <stream_dtlimit>
-      <dtlimit>1.e30</dtlimit>
-    </stream_dtlimit>
-    <stream_readmode>single</stream_readmode>
-  </stream_entry>
-
-  <stream_entry name="co2tseries.SSP4-3.4.latbnd">
-    <stream_meshfile>
-      <meshfile>none</meshfile>
-    </stream_meshfile>
-    <stream_datafiles>
-      <file>$DIN_LOC_ROOT/atm/datm7/CO2/fco2_datm_lat-bandsSSP4-3.4_simyr_2014-2500_CMIP6_c190514.nc</file>
-    </stream_datafiles>
-    <stream_datavars>
-      <var>CO2   Sa_co2diag</var>
-    </stream_datavars>
-    <stream_lev_dimname>null</stream_lev_dimname>
-    <stream_mapalgo>
-      <mapalgo>none</mapalgo>
-    </stream_mapalgo>
-    <stream_vectors>null</stream_vectors>
-    <stream_year_align>2015</stream_year_align>
-    <stream_year_first>2015</stream_year_first>
-    <stream_year_last>2500</stream_year_last>
-    <stream_offset>0</stream_offset>
-    <stream_tintalgo>
-      <tintalgo>linear</tintalgo>
-    </stream_tintalgo>
-    <stream_taxmode>
-      <taxmode>extend</taxmode>
-    </stream_taxmode>
-    <stream_dtlimit>
-      <dtlimit>1.e30</dtlimit>
-    </stream_dtlimit>
-    <stream_readmode>single</stream_readmode>
-  </stream_entry>
-
-  <stream_entry name="co2tseries.SSP4-6.0.latbnd">
-    <stream_meshfile>
-      <meshfile>none</meshfile>
-    </stream_meshfile>
-    <stream_datafiles>
-      <file>$DIN_LOC_ROOT/atm/datm7/CO2/fco2_datm_lat-bandsSSP4-6.0__simyr_2014-2500_CMIP6_c190506.nc</file>
-    </stream_datafiles>
-    <stream_datavars>
-      <var>CO2   Sa_co2diag</var>
-    </stream_datavars>
-    <stream_lev_dimname>null</stream_lev_dimname>
-    <stream_mapalgo>
-      <mapalgo>none</mapalgo>
-    </stream_mapalgo>
-    <stream_vectors>null</stream_vectors>
-    <stream_year_align>2015</stream_year_align>
-    <stream_year_first>2015</stream_year_first>
-    <stream_year_last>2500</stream_year_last>
-    <stream_offset>0</stream_offset>
-    <stream_tintalgo>
-      <tintalgo>linear</tintalgo>
-    </stream_tintalgo>
-    <stream_taxmode>
-      <taxmode>extend</taxmode>
-    </stream_taxmode>
-    <stream_dtlimit>
-      <dtlimit>1.e30</dtlimit>
-    </stream_dtlimit>
-    <stream_readmode>single</stream_readmode>
-  </stream_entry>
-
-  <stream_entry name="co2tseries.SSP5-3.4.latbnd">
-    <stream_meshfile>
-      <meshfile>none</meshfile>
-    </stream_meshfile>
-    <stream_datafiles>
-      <file>$DIN_LOC_ROOT/atm/datm7/CO2/fco2_datm_lat-bandsSSP5-3.4__simyr_2014-2500_CMIP6_c190506.nc</file>
-    </stream_datafiles>
-    <stream_datavars>
-      <var>CO2   Sa_co2diag</var>
-    </stream_datavars>
-    <stream_lev_dimname>null</stream_lev_dimname>
-    <stream_mapalgo>
-      <mapalgo>none</mapalgo>
-    </stream_mapalgo>
-    <stream_vectors>null</stream_vectors>
-    <stream_year_align>2015</stream_year_align>
-    <stream_year_first>2015</stream_year_first>
-    <stream_year_last>2500</stream_year_last>
+    <stream_year_last>2010</stream_year_last>
     <stream_offset>0</stream_offset>
     <stream_tintalgo>
       <tintalgo>linear</tintalgo>
@@ -3956,24 +3731,24 @@
     <stream_readmode>single</stream_readmode>
   </stream_entry>
 
-  <stream_entry name="co2tseries.SSP5-8.5.latbnd">
+  <stream_entry name="co2tseries.omip.jra">
     <stream_meshfile>
       <meshfile>none</meshfile>
     </stream_meshfile>
     <stream_datafiles>
-      <file>$DIN_LOC_ROOT/atm/datm7/CO2/fco2_datm_lat-bandsSSP5-8.5__simyr_2014-2500_CMIP6_c190506.nc</file>
+      <file>$DIN_LOC_ROOT/atm/datm7/CO2/fco2_datm_global_ssp585_simyr_1750-2020_CMIP6_c200324.nc</file>
     </stream_datafiles>
     <stream_datavars>
-      <var>CO2   Sa_co2diag</var>
+      <var>CO2 Sa_co2diag</var>
     </stream_datavars>
     <stream_lev_dimname>null</stream_lev_dimname>
     <stream_mapalgo>
       <mapalgo>none</mapalgo>
     </stream_mapalgo>
     <stream_vectors>null</stream_vectors>
-    <stream_year_align>2015</stream_year_align>
-    <stream_year_first>2015</stream_year_first>
-    <stream_year_last>2500</stream_year_last>
+    <stream_year_align>198</stream_year_align> <!-- 6*(2018-1958+1)-(2018-1850) -->
+    <stream_year_first>1850</stream_year_first>
+    <stream_year_last>2019</stream_year_last>
     <stream_offset>0</stream_offset>
     <stream_tintalgo>
       <tintalgo>linear</tintalgo>