GFSv16.2 - dev

GFSv16.2 for developers on WCOSS2 and R&D

Supported resolutions and platforms:

• C768C384L127 cycled & C768 forecast-only on WCOSS2
• C384C192L127 cycled & C384 forecast-only on WCOSS2, Hera, and Orion
• C192C96L127 cycled & C192 forecast-only on WCOSS2, Hera, and Orion

Note: No high res (C768C384L127) support on R&Ds Hera/Orion in this version.

Supported verification packages:

• Fit2Obs v1.5
• METplus EMC_verif-global.v2.9.5

Setup steps:

1. Quick clone and build instructions

git clone -b gfs.v16.2.2 https://github.com/NOAA-EMC/global-workflow.git
cd global-workflow/sorc
sh checkout.sh
sh build_all.sh
sh link_fv3gfs.sh emc [wcoss2][hera][orion]

Follow additional build and link instructions here: https://github.com/NOAA-EMC/global-workflow/wiki/Clone-and-build-global-workflow/08b2ec4d0956ea1936d567d9a1ac32614aedfec1

2. Run experiment setup scripts

See the following global-workflow wiki page: https://github.com/NOAA-EMC/global-workflow/wiki/Run-setup-scripts-to-generate-experiment/c85d5c2f87b298b6f0536a2fc2fb425a092c70fc

Note: the above wiki links are to older revisions of the global-workflow GitHub wiki (before updates were made for GFSv17/develop). Use wcoss2 for the machine where needed (e.g. link_fv3gfs.sh script) and ignore references to now unsupported machines (e.g. WCOSS-Dell and WCOSS-Cray).

Report any issues to @KateFriedman-NOAA

GFSv16.2.2

GFS update to the internal RTOFS version (rtofs_ver=v2.3.0) in the versions/run.ver file.

RFC 9814 - RTOFS v2.3.0 - On WCOSS2, implement RTOFS.v2.3.0 into production.

Downstream models (GFS, HMON, HWRF, NOSOFS, and NWPS) will be updated to pick up the RTOFS.v2.3.0 output files. NCO/IDSB/Dataflow will update the "prod" link for NOMADS and ftpprd to point to the new version number. RTOFS v2.3.0 accounts for bug fixes, bias corrections, and changes in data inputs for operations. The initialization scheme for the previous version of RTOFS creates an initialization shock, spurious waves, and systematic errors in the prediction of the ocean state in the equatorial ocean. The technical correction in v2.3.0 nearly eliminates these systematic errors.

Implemented August 2 2022 at 1400Z.

Supported on WCOSS2.

GFSv16.2.1

RFC 9682 - GFS v16.2.1 - On WCOSS2, update GFS package to v16.2.1. This includes fixes for two issues:

• Source code and resource configuration changes to address bufr sounding job failures.
• Script changes to address the gfs_forecast job restart issue that happened when the f1 filesystem was degraded.

Implemented July 5 2022 at 1330Z.

Supported on WCOSS2.

GFSv16.2.0

RFC 9652 - Switch operations from the WCOSS1 to WCOSS2 supercomputer. This will provide increased computational resources necessary
to continue improving numerical guidance.

The primary SCN can viewed here:

https://www.weather.gov/media/notification/pdf2/scn22-40_operational_supercomputer_go-live_aaa.pdf

WCOSS2 go-live was June 28th 12z cycle.

Supported on WCOSS2.

GFSv16.1.8

RFC 9515 - On WCOSS1, modify ‘global_convinfo.txt’ to turn on assimilation of Meteosat-9 AMVs (Atmospheric Motion Vectors). Meteosat-9 replaces Meteosat-8 as the operational geostationary platform over the Indian Ocean on June 1. In order to maintain continuity of operations, the above file needs to be modified.

Implemented on May 31st, 2022 at 1140Z.

Supported on WCOSS-Dell.

GFSv16.1.7

RFC 9365 - On WCOSS, implement GFS v16.1.7 to update the tropical storm names for the 2022 hurricane season and implement a syndat_getjtbul code change for the JTWC tcvital information format change.

Implemented on April 19th, 2022 at 1430Z.

Supported on WCOSS-Dell.

GFSv16.1.6

RFC 9296 - On WCOSS, update the GFS to v16.1.6 to turn on the active assimilation of GeoOptics (radio occultation) data. A change is also needed in the ‘global_convinfo.txt’ file to accompany a change in the observation processing (obsproc_global.v3.4.3) for vadwnd data.

Implemented on March 31st, 2022 at 1430Z.

Supported on WCOSS-Dell.

GFSv16.1.5

RFC 8823 - On WCOSS, update GFS to v16.1.5 which includes:

• Turn on the active assimilation of Metop-C IASI (Infrared Atmospheric Sounding Interferometer) data with correlated observation errors
• Update correlated observation errors for Metop-B IASI, N20 CrIS (Cross-track Infrared Sounder), and NPP CrIS
• Put in a minimum threshold for saturation specific humidity to avoid potential minimization issues.
• Add the 2022 CO2 projection files.

Implemented on October 26 at 1430Z.

Supported on WCOSS-Dell.

GFSv16.1.4

RFC 8702 - On WCOSS, implement GFS v16.1.4. This update includes turning on the active assimilation of Spire gpsro (GPS radio occultation) data and turning off the active assimilation of GeoOptics gpsro data. In addition, this update will fix a bug in the GFS/GSI where large errors are seen in SSTs.

Implemented on September 27 at 1430Z.

GFSv16.1.3

RFC 8691 - On WCOSS, turned off IASI (Infrared Atmospheric Sounding Interferometer) on Metop-A in multiple models' ‘satinfo.txt’ files. This was done because IASI on Metop-A has been significantly degraded since September 17. Since the instrument is being decommissioned next month, NCO permanently removed this instrument from assimilation.

Implemented on September 22 at 1140Z.