Create CMIP7 based compsets and eam use_case files #7735

wlin7 · 2025-09-29T04:14:17Z

Create CMIP7-based compset using a slightly revised convention
TIME[%scenario]_ATM[%phys]_LND[%phys...
where scenario is related to forcing specifications.

The new compsets are in parallel to the CMIP6 based production compsets.
The compsets added are as follows,

WCYCL1850-CMIP7
WCYCL1950-CMIP7
WCYCL20TR-CMIP7
2010-CMIP7

When the compset is used to create v3 high-resolution (ne120pg2)
configuration, the high-resolution version (0.5 degree) of CMIP7
forcings will be used. Otherwise, the 2-degree resolution version
will be used for CMIP7 compsets.

1950, 2010, and 20TR compsets still use some CMIP6 based input files.

CMIP7 based land surfdata (fsurdat) and lulc (flanduse_timeseries) are
currently available for 1850 and 20TR at r025 resolution. The original
files are set as default. Simulations that intend to use modified fsurdat
can override via user_nl_elm.

[BFB] No impact for previously existing compsets which use CMIP6

e3sm_atm_integration test suite passed in a test merge to master, except for ERS_Ld5.ne4pg2_oQU480.F2010xx-ZM which uses L72 instead of L128. (For updates to this branch up to 10/12/2025)

Data or specifications need to be updated.

GHGs:

Any revision for the prescribed concentrations for 1850, 1950, and 2010? (Yes, done)
Does 1pctCO2 file needs revision? Supposed so, as the baseline (1850) value changes slightly.
Historical transient CMIP7 GHGs data (updated)

Volcanic data

File for the high-resolution version for the historical period is not finalized. 2deg version is used as a place holder
Need cmip7 data for 2010 compset. Currently using the version from CMIP6.

E90, Linoz data, Chlorine loading, and oxidants

Use CMIP6 based files extended using ssp245 (Chlorine loading and linoz data after 2017)
Same files for 1850 and 20TR compsets, but with different time-related data stream parameters, except E90 for the 2010 compset

2010

Available 2010_clim forcings only at low resolution (2 degree).
Solar input file still using the CMIP6 version

Land CMIP7 forcing

cmip7 popdens file goes via cmip7 use_case files (instead of namelist_defaults.xml)
cmip7 fsurdat available at r025 grid. TBD if to further modify by zeroing out PCT_LAKE over the Antarctic and Greenland. If so, for F20TR, also need to update the landuse_timeseries file.

rljacob · 2025-10-01T15:34:18Z

Is this ready? I think its the last PR needed for v3.HR?

rljacob · 2025-10-02T00:04:13Z

...onents/eam/bld/namelist_files/use_cases/1850_eam_CMIP7-HR_chemUCI-Linoz-mam5-vbs-1pctCO2.xml

+<?xml version="1.0"?>
+<namelist_defaults>
+
+<!-- Set default output options for CMIP6 simulations -->


Should this and other comments say "CMIP7" ?

Done. Changed to CMIP7 accordingly for those that use the CMIP7 files (solar, GHGs, elevated and surface emissions).

But the comment above still needs to have "CMIP6" changed right?

@wlin7, I believe Rob referred to "CMIP6" in this line of comment: -- Set default output options for CMIP6 simulations --

Thanks. This and a few more comment lines still containing CMIP6 but meant to be CMIP7 have been fixed.

rljacob · 2025-10-02T00:06:10Z

Should these be added?

EAM:
nucleate_ice_subgrid = 1.45
clubb_c8 = 5.0

hwangacme · 2025-10-03T05:33:35Z

...onents/eam/bld/namelist_files/use_cases/1850_eam_CMIP7-HR_chemUCI-Linoz-mam5-vbs-1pctCO2.xml

+<!-- Solar constant from CMIP6 input4MIPS -->
+<solar_data_file>atm/cam/solar/multiple_input4MIPs_solar_CMIP_SOLARIS-HEPPA-CMIP-4-6_gn_bluetip.nc</solar_data_file>
+<solar_data_ymd>18500101</solar_data_ymd>
+<solar_data_type>FIXED</solar_data_type>


Atmospheric initial condition and solar constant files also need to be updated to CMIP7 and HR

Solar input files are using cmip7 except for the 2010 compset. Atm IC file likely no more needed here.

The specification for atm IC (L72) has been removed from all use_case files.

components/eam/bld/namelist_files/use_cases/1850_eam_CMIP7_chemUCI-Linoz-mam5-vbs-1pctCO2.xml

driver-mct/cime_config/config_component_e3sm.xml

components/eam/bld/namelist_files/use_cases/20TR_eam_CMIP7-HR_chemUCI-Linoz-mam5-vbs.xml

mingxuanwupnnl · 2025-10-05T18:34:43Z

components/eam/bld/namelist_files/use_cases/20TR_eam_CMIP7-HR_chemUCI-Linoz-mam5-vbs.xml

+<!-- Stratospheric ozone (Linoz) updated using CMIP6 input4MIPS GHG concentrations -->
+<chlorine_loading_file      >atm/cam/chem/trop_mozart/ub/Linoz_Chlorine_Loading_CMIP6_0003-2017_c20171114.nc</chlorine_loading_file>
+<chlorine_loading_type      >SERIAL</chlorine_loading_type>
+<linoz_data_file            >linv3_1849-2017_CMIP6_Hist_10deg_58km_c20230705.nc</linoz_data_file>
+<linoz_data_path            >atm/cam/chem/trop_mozart/ub</linoz_data_path>
+<linoz_data_type            >INTERP_MISSING_MONTHS</linoz_data_type>


need to change the two linoz files to the extended ones

Thanks. These two plus oxidant and E90 files are updated to use the extended ones.

components/eam/bld/namelist_files/use_cases/1850_eam_CMIP7-HR_chemUCI-Linoz-mam5-vbs.xml

hwangacme

I have finished reviewing the changed files and provided my comments.

hwangacme · 2025-10-15T22:16:05Z

...onents/eam/bld/namelist_files/use_cases/1850_eam_CMIP7-HR_chemUCI-Linoz-mam5-vbs-1pctCO2.xml

+<?xml version="1.0"?>
+<namelist_defaults>
+
+<!-- Set default output options for CMIP6 simulations -->


@wlin7, I believe Rob referred to "CMIP6" in this line of comment: -- Set default output options for CMIP6 simulations --

hwangacme · 2025-10-15T22:18:28Z

components/eam/bld/namelist_files/use_cases/1850_eam_CMIP7-HR_chemUCI-Linoz-mam5-vbs.xml

+<sim_year>1850</sim_year>
+
+<!-- land datasets -->
+<!-- Set in components/clm/bld/namelist_files/use_cases/1850_CMIP6_control.xml -->


There is "CMIP6" in Line 132 here.

components/eam/bld/namelist_files/use_cases/1850_eam_CMIP7_chemUCI-Linoz-mam5-vbs-1pctCO2.xml

hwangacme · 2025-10-15T22:21:57Z

components/eam/bld/namelist_files/use_cases/1850_eam_CMIP7_chemUCI-Linoz-mam5-vbs.xml

+<sim_year>1850</sim_year>
+
+<!-- land datasets -->
+<!-- Set in components/clm/bld/namelist_files/use_cases/1850_CMIP6_control.xml -->


"CMIP6" here also require attention.

components/eam/bld/namelist_files/use_cases/2010_eam_CMIP7_chemUCI-Linoz-mam5-vbs.xml

hwangacme · 2025-10-15T22:30:40Z

components/elm/bld/namelist_files/use_cases/1850_CMIP7_control.xml

+<stream_fldfilename_popdens phys="elm" use_cn=".true." >lnd/clm2/firedata/elmforc.popden_cmip7_gr_0.5x0.5_simyr1850-2025_c250822.nc</stream_fldfilename_popdens>
+
+
+<!-- CMIP6 DECK compsets -->


"CMIP6" wording and new land surface files required

hwangacme · 2025-10-15T22:35:39Z

components/elm/bld/namelist_files/use_cases/20thC_CMIP7_transient.xml

+
+<sim_year>1850</sim_year>
+
+<sim_year_range>1850-2015</sim_year_range>


Will this year range be updated?

Yes, changed to 1850-2023.

hwangacme · 2025-10-15T22:37:10Z

components/elm/bld/namelist_files/use_cases/20thC_CMIP7_transient.xml

+
+
+<stream_year_first_ndep phys="elm" use_cn=".true."   >1850</stream_year_first_ndep>
+<stream_year_last_ndep  phys="elm" use_cn=".true."   >2101</stream_year_last_ndep>


Here the last year 2101 is different than the one for Popden (2100) and in the year range.

hwangacme · 2025-10-15T22:38:27Z

components/elm/bld/namelist_files/use_cases/20thC_CMIP7_transient.xml

+
+<stream_fldfilename_popdens phys="elm" use_cn=".true." >lnd/clm2/firedata/elmforc.popden_cmip7_gr_0.5x0.5_simyr1850-2025_c250822.nc</stream_fldfilename_popdens>
+
+<!-- CMIP6 DECK compsets -->


The land input files names below will need to be updated to CMIP7

hwangacme · 2025-10-15T22:40:38Z

components/elm/cime_config/config_component.xml

      <value compset="PDAY.*_ELM"            >1850-2100_rcp4.5_transient</value> 
      <!-- CMIP6 DECK compsets and related BGC compsets -->
      <value compset="1850(?:SOI)?_EAM%CMIP6_ELM">1850_CMIP6_control</value>
+      <value compset="1850(?:SOI)?.*CPLHIST_ELM">1850_CMIP6_control</value>


Not sure why this new compset is added for CMIP6.

This is a make-up. Shixuan's alternating (CMIP6) based has been using long compset name: 1850SOI_DATM%CPLHIST_ELM%CNPRDCTCBCTOP_MPASSI_MPASO%DATMFORCED_MOSART ..., and without this, he had to manually reset ELM_NML_USE_CASE during the uncoupled phase.

hwangacme · 2025-10-15T23:42:49Z

@wlin7 With the two new namelist variables added for the MAM5 CMIP7 tuning, the namelist_defaults_eam has changed. The two variables have a default value of 4.D-7 for the CMIP6 compsets, while their new value for CMIP7 is 1.D-6. Should this change be directly included in all the CMIP7 use_case files?

rljacob · 2025-10-16T17:27:00Z

@xuezhengllnl please approve.

wlin7 · 2025-10-16T21:51:47Z

@wlin7 With the two new namelist variables added for the MAM5 CMIP7 tuning, the namelist_defaults_eam has changed. The two variables have a default value of 4.D-7 for the CMIP6 compsets, while their new value for CMIP7 is 1.D-6. Should this change be directly included in all the CMIP7 use_case files?

@hwangacme. Thanks for the careful review. These parameter value changes will go with run script for now. We can later set as default for CMIP7 cases after Mingxuan's #7795 is merged.

Create CMIP7 based compsets and eam use_case files Create CMIP7-based compset using a slightly revised convention TIME[%scenario]_ATM[%phys]_LND[%phys... where scenario is related to forcing specifications. The new compsets are in parallel to the CMIP6 based production compsets. The compsets added are as follows, . WCYCL1850-CMIP7 . WCYCL1950-CMIP7 . WCYCL20TR-CMIP7 . 2010-CMIP7 When the compsets are used to create v3 high-resolution (ne120pg2) configuration, the high-resolution version (0.5 degree) of CMIP7 forcings will be used. Otherwise, the 2-degree resolution version will be used for CMIP7 compsets. 1950, 2010, and 20TR compsets still use some CMIP6 based input files. CMIP7 based land surfdata (fsurdat) and lulc (flanduse_timeseries) are currently available for 1850 and 20TR at r025 resolution. The original files are set as default. Simulations that intend to use modified fsurdat can override via user_nl_elm. [BFB] No impact for previously existing compsets which use CMIP6

wlin7 · 2025-10-21T21:53:05Z

Merged to next. The conflict was on extra (now removed) entries for idealized CO2 config, as follows, where CMIP7 entry is also added

     <value compset="_EAM%CMIP6.*"            >&eamv3_phys_defaults; &eamv3_chem_defaults;</value>
      <value compset="_EAM%CMIP6-1pctCO2" >&eamv3_phys_defaults; &eamv3_chem_defaults;</value>
      <value compset="_EAM%CMIP6-4xCO2"   >&eamv3_phys_defaults; &eamv3_chem_defaults;</value>

The extra lines appear to come from a rebase for the GCAM-E3SM coupling branch

Create CMIP7 based compsets and eam use_case files

db95b84

wlin7 requested review from hwangacme, mingxuanwupnnl, rljacob, tangq and xuezhengllnl September 29, 2025 04:14

rljacob added Coupled Model v3.1beta labels Sep 29, 2025

wlin7 added 3 commits September 29, 2025 11:25

Set 20TR CMIP7 GHGs input file

ec6ab54

Set GHGs values for 1850 and 2010 compsets

0ead3a3

Update CMIP7 piControl volcanic emission file

bea3c75

rljacob approved these changes Oct 1, 2025

View reviewed changes

rljacob self-assigned this Oct 1, 2025

Set CO2VMR for CMIP7 PI/PD compsets

d49c2a8

rljacob reviewed Oct 2, 2025

View reviewed changes

Set EAM/ELM config options for CMIP7 compsets

09db230

hwangacme reviewed Oct 3, 2025

View reviewed changes

Fix DMS files for 1850-CMIP7 compsets

21bc3fc

mingxuanwupnnl reviewed Oct 5, 2025

View reviewed changes

wlin7 added 3 commits October 10, 2025 16:25

Update files for E90, oxidant, chlorine loading and linozv3 files

51b9de6

Update aerosol mode1 and mode5 physprops files for CMIP7 compsets

0da87a3

Add CMIP7 land use_case files and use CMIP7 popdens file

af1d1d4

wlin7 requested a review from bishtgautam October 15, 2025 19:38

hwangacme reviewed Oct 15, 2025

View reviewed changes

wlin7 added 2 commits October 16, 2025 14:11

Fix comment lines containing CMIP6 in EAM use_case files

7ad752d

Update sim_year_range in ELM 20thC_CMIP7 use_case

053b0e6

hwangacme approved these changes Oct 17, 2025

View reviewed changes

mingxuanwupnnl approved these changes Oct 17, 2025

View reviewed changes

wlin7 added 3 commits October 17, 2025 13:50

Update evelated SO2 emission file for CMIP7 20TR-HR use_case

7970016

Set r025 fsurdat and lulc for CMIP7 1850 and 20TR use_cases

92fa034

Set dust_emis_scheme=2 for CMIP7 compsets

2e06078

xuezhengllnl approved these changes Oct 21, 2025

View reviewed changes

wlin7 self-assigned this Oct 22, 2025

wlin7 merged commit 582e4be into master Oct 22, 2025

wlin7 deleted the wlin/v3hr_cmip7 branch October 22, 2025 15:15

darincomeau mentioned this pull request Nov 12, 2025

Add Polar CMIP7 based compsets #7881

Open

		<stream_fldfilename_popdens phys="elm" use_cn=".true." >lnd/clm2/firedata/elmforc.popden_cmip7_gr_0.5x0.5_simyr1850-2025_c250822.nc</stream_fldfilename_popdens>


		<!-- CMIP6 DECK compsets -->


		<sim_year>1850</sim_year>

		<sim_year_range>1850-2015</sim_year_range>



		<stream_year_first_ndep phys="elm" use_cn=".true." >1850</stream_year_first_ndep>
		<stream_year_last_ndep phys="elm" use_cn=".true." >2101</stream_year_last_ndep>

Create CMIP7 based compsets and eam use_case files #7735

Create CMIP7 based compsets and eam use_case files #7735

Uh oh!

Conversation

wlin7 commented Sep 29, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

rljacob commented Oct 1, 2025

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

rljacob commented Oct 2, 2025

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

hwangacme left a comment

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Choose a reason for hiding this comment

Uh oh!

hwangacme commented Oct 15, 2025

Uh oh!

rljacob commented Oct 16, 2025

Uh oh!

wlin7 commented Oct 16, 2025

Uh oh!

wlin7 commented Oct 21, 2025

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

6 participants

wlin7 commented Sep 29, 2025 •

edited

Loading