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rtodling edited this page Mar 21, 2026 · 28 revisions

List of X-Experiments

Exp Name Period Tag/Version Storage Strategy Blurb
x0016 Summer 2015; Winter 2015-16 GEOSadas-5_13_1_p2 N/A Full ADAS Baseline
x0027_ctl Winter 2016-17 EnADAS-5_17_0p5 /archive/u/mfuente2/ Full ADAS Baseline
x0027A Winter 2016-17 EnADAS-5_17_0p5 /archive/u/rtodling/ Full ADAS Hyb-4DEnVar
x0035_Ana Winter 2017-18; Summer 2018 GEOSadas-5_22_0 /archive/u/dao_it Full ADAS Baseline
x0039_p5 Winter 2019-20 rt-GEOSadas-5_25_1p5 /archive/u/dao_it Full ADAS Baseline
x0039_p6 Summer 2019 rt-GEOSadas-5_25_1p6 /archive/u/dao_it Full ADAS Baseline
x0041 Summer 2019; Winter 2019-20 GEOSadas-5_26_0_p3 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0042 Summer 2019; Winter 2019-20 GEOSadas-5_27_1 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0042c2 Summer 2019; Winter 2019-20 GEOSadas-5_27_1 PRJ/dadev/dao_it/archive Full ADAS COSMIC-2
x0043 Summer 2019; Winter 2019-20 GEOSadas-5_27_1 PRJ/dadev/dao_it/archive Full ADAS Baseline
--- -------- HERE ON: ALL GIT TAGS -------- -------- --------
x0044 S2019; W2019-20; W2020-21 rt-GEOSadas-5_27_1_p3 PRJ/dadev/rtodling/archive Full ADAS Baseline
x0045 Winter 2021 rt-GEOSadas-5_28_0_p3 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0045z Winter 2021 rt-GEOSadas-5_28_0_p5z PRJ/dadev/dao_it/archive Full ADAS Test
x0045a Winter 2021 rt-GEOSadas-5_28_0_p5 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0046 Winter 2021 rt-GEOSadas-5_29_1 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0046aRPY Winter 2021 rt-GEOSadas-5_29_2 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0046a S2019 W2021 W2022 rt-GEOSadas-5_29_3_p2(*) PRJ/dadev/dao_it/archive Full ADAS Baseline
x0046c W2022 GEOSadas-5.29.4.1 PRJ/dadev/rtodling/archive Full ADAS Baseline
x0046d W2022 GEOSadas-5.29.4.1 PRJ/dadev/rtodling/archive Full ADAS Baseline
x0046d S2022 GEOSadas-5.29.5-p1 PRJ/dadev/rtodling/archive Full ADAS Baseline
x0046d S2023 GEOSadas-5.29.5-p2 PRJ/dadev/rtodling/archive Full ADAS Baseline
x0046e S2023 GEOSadas-5.29.5-p4 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0047RPY S2022 rt-GEOSadas-5.30.0-x0047 PRJ/dadev/rtodling/archive Replay ADAS Baseline
x0048 S2022 GEOSadas-5.30.1 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0048 W2021-22 GEOSadas-5.30.2 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0049 S2023 GEOSadas-5.30.3 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0050RPY S2023 GEOSadas-5.41.0 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0050 S2023 GEOSadas-5.41.1 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0050tb S2023 GEOSadas-5.41.1 PRJ/dadev/dao_it/archive Full ADAS Baseline
x0051 F2023/W2024 GEOSadas-5.42.1 PRJ/dadev/rtodling/archive/542 Full ADAS Baseline
x0053RPY W2026 v5.43.0 PRJ/dadev/rtodling/archive/543 Replay to f5421_fppf/5430_fp Baseline
x0054 W2026 v5.44.4 PRJ/dadev/rtodling/archive/544 Full ADAS Baseline

Notes:

  • PRJ stands for /discover/nobackup/projects/gmao
  • Removed refers to experiments removed from archive and no longer available

Key Forward Processing Upgrades and Corresponding X-Experiments

FP Tag/Version date X-Exp Baseline Main Feature
e513_fp GEOSadas-5_13_1_p2 ?? x0016 Hybrid 3DEnVar
f516_fp GEOSadas-5_16_0_p5 01 Nov 2016 xxx 12.5 km system
f517_fp GEOSadas-5_17_0_p5 24 Jan 2017 x0027A Hybrid 4DEnVar
f521_fp GEOSadas-5_21_2 11 Jul 2018 x0034 see
f522_fp GEOSadas-5_22_0_p9 13 Mar 2019 x0035_Ana see
f525_fp GEOSadas-5_25_1_p6 30 Jan 2020 x0039(p5/p6) see
f5271_fp GEOSadas-5_27_1_p2 25 Feb 2021 x0044 see, TM
f5293_fpp rt-GEOSadas-5_29_3_p2 1 Nov 2021 x0046a see, TM
f5293_fpp GEOSadas-5_29_4 3 Feb 2022 x0046a see, TM
f5294_fp GEOSadas-5_29_4 1 Mar 2022 x0046a see, TM
f5295_fpp GEOSadas-5.29.5-p2 Mar 2022 x0046d see, TM
f5295_fp GEOSadas-5.29.5-p3 Feb 2023 x0046d see, TM
f5295_fp GEOSadas-5.29.5-p4 Mar 2024 x0046e see, TM
f5295_fp GEOSadas-5.29.5-p6 May 2024 x0046e see, TM
f5413_fpp GEOSadas-5.41.3 Dec 2024 x0050 see, TM
f5421_fpp v5.42.8 May 2025 x0051 see, TM
f5430_fp v5.43.0 Feb 2026 none see, TM

Notes:

  1. Additional information on GEOS Forward Processing (FP) updates and other GEOS Atmospheric Assimilation Products is available by following this link.

  2. Release 5.29.5x for the ADAS uses GEOSgcm science from v10.19.3

Blurb on Experiments

x0035_Ana

GCM Jason + CrIS (FSR) and ATMS NOAA-20, retune the polar AMV’s, NEXRAD winds off, OMPS ozone mapper on, and AIRS and IASI correlated errors.

x0039

Mainly changes to AGCM: see the GEOSgcm_App ChangeLog file for GCM updates for Jason-3_3 & Jason-3_4

  • RRTMG updates for version 4.10 from Eli
  • Correction to GF diagnostics.
  • Updates to produce stratospheric forecast statistics
  • Correction to gcm_run.j & gcm_forecast.tmpl related to REPLAY with GAAS aod files
  • Updated Aerosol Tuning and Transport with GF.
  • Implement new regrid.pl for proper use with LAND (fixes long-standing errors with regridding)
  • many others; see ChangeLog

x0039_p6 (p5)

  • Correction to RRTMG Shortwave to remove/significantly_reduce stratospheric cold bias.

x0041

  • Merge with NCEP
  • All-sky MHS, AMSR-2
  • Aircraft bias correction
  • MetOp-C radiances (no IASI)
  • Ozone-sensitive hyper-IR radiances
  • Fix for passive thinning

x0042

  • Update to Atmos-Ocean Skin Layer (though same formulation as in x0041)
  • Revise GNSSRO foward operator (code change to reduce bias)

x0042c2

  • As x0042 plus COSMIC-2 GPSRO

x0042t1

  • Replay to x0042 ensemble, with Deterministic ADAS removing the Dry Mass Constraint

x0043

  • Variational bias correction of aircraft observations
  • Modified observation operator for GNSS RO
  • All-sky MHS and AMSR-2 radiances
  • Add Metop-C: AMSU-A and MHS radiances, as well as GRAS GNSS RO
  • Add COSMIC-2 GNSS RO
  • Revised CrIS radiance assimilation: (i) CrIS-FSR for SNPP; (ii) revised FSR channels for both SNPP and NOAA-20; (iii) account for inter-channel observation error correlations

x0044

As x0043 but:

  • Ozone-sensitive radiances for all hyperspectral IR
  • CrIS-FSR over ocean waters only
  • x0044 is also a skip-ahead experiment that moves the baseline to Winter 2020/21

x0045

Looks at the consequences of:

  • Additional sources of RO observations (#28): PAZ (kx=44), KOMPSAT(kx=825)
  • Additional commercial RO observations (#28): GeoOptics(kx=265) & Spire (kx=269)
    Note period of availability: 20201218_00z-20210114_18z
  • Additional IASI from Metop-C (kx=877; treated as IASI on Metop-A and -B)
  • Replace version of CRTM to CRTM-2.3.0
  • Correction for high-latitude buoy handling (#23)

Note 1: An error was found in the settings of this exp that cause RO data to be exactly doubled at read. As it turns out, given how GSI handles superob/RO weighting this turns out to be minor, but the experiment is being re-run (see x0045a).

Note 2: A series of independently-run OSE's has identified assimilation of SatWind observations to degrade ADAS results. Further and closer investigation identifies the issue to be with how GOES-R is not being thinned and it is having its errors cut down to half, causing the fits to be overwhelmingly force toward GOES-R at the detriment of fits to other data.

x0045z (never actually ran)

As in x0044 and:

  • CRTM update to CRTM-2.3.0
  • Correction for high-latitude buoy handling (#23)
  • Revised handling of GOES-R: thinning applied to kx=245 and 246, and ob-error as in prep-error-table.

x0045a

As in x0045, and:

  • Additional sources of RO observations (#28): PAZ (kx=44), KOMPSAT(kx=825)
  • Additional commercial RO observations (#28): GeoOptics(kx=265) & Spire (kx=269)
    Note period of availability: 20201218_00z-20210114_18z
  • Additional IASI from Metop-C (kx=877; treated as IASI on Metop-A and -B)
  • Replace version of CRTM to CRTM-2.3.0
  • Correction for high-latitude buoy handling (#23)

but unlike x0045 this now includes:

  • Correction for double RO data error in original x0045, and
  • Revised handling of GOES-R: thinning applied to kx=245 and 246, and ob-error as in prep-error-table (bypass halving of ob error wired by NCEP).

x0046

  • From the analysis perspective the following has been changed:

    1. Removal of GeoOptics & Spire
    2. Mild revision to RO operator (see Revision from Lidia )
    3. Also includes Jing changes to support trace gas analysis (zero-diff for meteorology see)
    4. Windowed-out AIRS data for 1 Dec 2020; data is corrupt in its default location (see obsys.rc)

  • Updates MAPL to MAPL-2 and incorporates version v1.12.3 of the model (this having been shown to give largely neutral results as compared viz. z0044 vs x0044).

  • Tag for this experiment has not been versionized (but it will be to form a release for FPP)

  • REMARK: This run failed: CO2 from model was found to have a problem (it was being removed by deposition and affecting the radiance assimilation in an undesirable fashion). See x0046aRPY and x0046a for replacement.

x0046aRPY

  • This is identical to x0046, expect:
    1. CO2 bug is now fixed (no deposition of carbon species)
    2. Replay ensemble to x0045a: this is for a "quick" check to see that all is well with the fix (see x0046a for full run)

x0046a (under dao_it)

  • This is nearly identical to x0046aRPY, expect that:

    1. Turns off ASCAT from Metop-A (leaving that from Metop-B on) see full explanation
    2. Runs full ADAS (on Skylake nodes)
    3. Adds capability to run on Skylake and Cascade

  • Summer case actually uses: GEOSadas-5_29_3_p3; relevant changes from tag rt-GEOSadas-5_29_3_p2 used for Winter case are:

    1. Trim of aircraft bias correction file (to have reproducibility in Winter case, use ``setenv CLEANUP_BIAS 0'').
    2. Version 5 (as opposed to V4) MLS-T data; these data are presently only used passively for verification; so results are not really affected; reversal to v4 is possible by simply editing obsys.rc.
    3. Fix to auto-launch of monthly means script (zero diff).
    4. Fix for (SLURM) constraint in script controlling ASENS jobs (zero-diff).
    5. There also numerous other changes but those related to procedures not involved in x-exps or FP-like applications.

  • Second Winter covering Nov 2021 to Jan 2022 uses: FP tag GEOSadas-5_29_4

    1. Incorporates all changes in both Winter and Summer above.
    2. Moves control period ahead in time (see x0046b).

Milestone: Upgrade from 5.27.1 to 5.29.4

  • Additional sources of RO observations (#28): PAZ (kx=44), KOMPSAT(kx=825)
  • Additional IASI from Metop-C (kx=877; treated as IASI on Metop-A and -B)
  • Upgrade version of CRTM to CRTM-2.3.0
  • Correction for high-latitude buoy handling (#23)
  • Revised handling of GOES-R: thinning applied to kx=245 and 246, and ob-error as in prep-error-table
    Mild revision to RO operator (see Revision from Lidia )
  • Changes to support trace gas analysis (zero-diff for meteorology see)
  • MAPL-2.8.0 - patched
  • Integrated RadMon
  • On the model side:
    (i) no deposition of carbon species;
    (ii) revised Henry's Law constant for NH3 following https://doi.org/10.5194/acp-17-12911-2017
  • Running on Skylake
  • And a host of minor changes/fixes/expanded scripting workflow capabilities

x0046c (under rtodling)

  • As in x0046a, but running over Dec 2021 and Jan 2022 testing addition of Spire RO: commgpstop=45.,spiregpserrinf=2.
  • The follow parameters associated with RO have been adjusted: nsig_ext=18,gpstop=55 The justification for the top adjustment is to follow recommendation above others (Rick Anthes & U.K. Met Office) in thinking that RO above 55 km has error that are not properly handled in our current systems.

x0046d (under rtodling)

  • Winter 2021-22: Spire RO test in the configuration of NCEP's operations; also lower top of RO use to 55km.
  • Summer 2022: Similar RO configuration as from Winter case.
  • Winter and Summer based on mildly different tags (see table above); the difference being the model solar parameters.
  • Summer 2023 - run with slightly modified sat-db to match FP's choice (since running very two-weeks behind real-time).

Milestone: Upgrade from 5.29.4 to 5.29.5

  • Tag: GEOSadas-5.29.5-p2 (same as GEOSadas-5.29.4-p3 - the GEOS-IT tag)
  • GEOS-IT ready
  • Add Spire RO (NOAA/NCEP operational version)
  • Lower RO top from 60km to 55km
  • Update model solar parameters
  • Revise MAPL regrid options in HISTORY (not for background fields, so zero-diff in this sense)
  • Introduce convinfo database as a means to control in/out data considered conventional (zero-diff)

x0047RPY (under rtodling)

  • Summer 2022: Similar x0046d, but updating model to v10.23.0 (including MAPL and related repos).
  • The main addition here is GOCART-2G.
  • This exp replays the ensemble to that from x0046d (its control).

x0048

  • As x0047PRY, but running full ADAS (including ensemble).
  • Main purpose: test various fixes related to assimilation of hyperspectral IR observations: revide cloud detection for CrIS-FSR; adjust QC; adjust varBC.
  • This experiment also introduces: CRTM v2.4.0 (in NCEP_Shared)
  • Supports tracer analysis with reference to minimal background information (no need for sfc and upper air meteorological fields).
  • Model version v10.25.1 (zero-diff to v10.25.0, but aided with R21C output needs).

x0048

  • Mostly similar to x0048-Summer, but set up using revised restarts for the satellite biases; both IR and MW.
  • Details of changes can be found in the release notes.

x0049

  • Main modifications are addition of Planet IQ (RO) and revised surface marine data handling.
  • Running over Summer 2023 (mid-July onward).
  • Baseline for comparison is x0046d.
  • Further details are found under: release notes.

Milestone: Upgrade from 5.29.5-p3 to 5.29.5-p4

  • Improved handling of ship observations (should see FSOI for ship going in right direction).
  • Enable Planet-IQ (RO)
  • Capable of handling OMPS-LP
  • Capable of handling NOAA-21 (ATMS)

x0046e

x0050RPY

  • Summer 2023 - Combines the following:

  • Model: 11.5.2 (with a change to GEOS_mkiau to allow for its handling of cubed background and analysis files)

  • Analysis:

    • CRTM-2.4.0 as in the 5.30.x system (notice this points to the CRTM as in M21C - i.e., with proper Cloud Coeff used in All-sky)
    • brings in changes from 5.29.5-p7
    • brings in changes x0049 (5.30.3)

  • Adds GridComp for LDAS - but inactive in any of the cases considered in 5.41.0

  • Restart for summer case differs from restarts used in x50R12rt experiment in that the satbias-pc are refreshed for MW.

x0050

x0050tb

  • As x0050, but using conversion from antenna to brightness temperatures and 20 vegetation types

x0051

  • Fall 2023 (Winter 2024)

  • Milan ready: notice Milan is still not as stable as we would hope

  • Model: v11.7.0

  • Analysis Main Features:

    • Addition of ATMS on NOAA-21
    • As x0050tb: using conversion from antenna to brightness temperatures and 20 vegetation types

Milestone: Upgrade from 5.29.5 to 5.43.0

See summary of changes here

x0053RPY

  • Winter 2026
  • Ensemble replay to f5421_fpp covering Dec-Jan 2026
  • This is to serve as baseline for experiments including other update soon to be aimed at an upgrade of f5430_fp
  • Notice that up to the end of Jan 2026 this run replays to the ensemble of f5421_fpp; from February onward it replays to the ensemble of f5430_fp

x0054

  • Winter 2026
  • Dec-Jan are aimed at testing new analysis features:
    • Revised Sat-Wind QC
    • Revised IR QC and use of CrIS-FSR-N21
    • Assimilation of ABI
  • This runs uses MODIS observations and QFED emissions up to the end of January. From February onwards the run switches to assimilating VIIRS observations in the AOD analysis and using VIIRS-based QFED emissions.

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