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000
NOUS41 KWBC 271516
PNSWSH

Technical Implementation Notice 15-38
NOAA National Ocean Service Headquarters Washington DC
Relayed by National Weather Service Washington DC
1118 AM EDT Mon Jul 27 2015

To:       Subscribers:
          -Family of Services
          -NOAA Weather Wire Service
          -Emergency Managers Weather Information Network
          -NOAAPORT
           Other NWS and NOS partners and NWS and NOS employees

From:     Pat Burke
          Chief, Oceanographic Division
          NOS Center for Operational Oceanographic Products
          and Services (CO-OPS)

Subject:  Updating National Ocean Service Oceanographic Forecast
          Modeling Systems Effective October 6, 2015

Effective October 6, 2015 beginning at 15Z Coordinated Universal
Time (UTC) (10AM EST), updates of National Ocean Service
Operational Forecast Systems will be implemented on NOAA`s Weather
Climate Operational Supercomputing System (WCOSS) operated by NCEP
Central Operations (NCO). The updates include ROMS and FVCOM
version updating and shared framework (COMF) updates. COMF updates
include using NCO standard module files and other enhancements. The
details of this implementation are:

1. ROMS version Updates for CBOFS, DBOFS, and TBOFS

The core ocean model currently used for CBOFS, DBOFS and TBOFS
is ROMS3.6 v90 released in 2007, which is no longer supported by
ROMS developers at Rutgers University. The latest ROMS3.7
Version 766, released in June 2015, will replace the ROMS
version 90. Version 766 includes many bug fixes in ROMS version
90 and adds new features.

The horizontal and vertical mixing schemes for tracers are
replaced by Fourth-order Akima advection based on
recommendations of ROMS developers and semi-operational testing
results. A new option of C-preprocessor (CPP) in the surface
heat flux boundary condition subroutine (set_vbc.F) was
developed by Rutgers University to prevent the water temperature
decreasing beyond the freezing point of seawater (when a sea ice
model is not active). This option was tested by the CO-OPS
Modeling team using CBOFS and DBOFS and the expected results
were achieved. This option is critical for Cook Inlet OFS
(CIOFS), which will be implemented in FY16. There are not major
changes regarding hydrodynamics and physics in this version
compared with ROMS3.6 version 90. Therefore, the results
obtained from using ROMS3.6 and ROMS3.7 are similar for CBOFS,
DBOFS and TBOFS. There are no changes of CBOFS, DBOFS and TBOFS
products (e.g., file name and contents, deliver time, etc.) for
end users.

2. FVCOM version updates for NGOFS, NEGOFS, NWGOFS, and SFBOFS

FVCOM version updates will resolve and enhance the following
features:
a. Fix the jetty bug in the present FVCOM version used by NWGOFS
(vertvl_edge.F) which will currently impact NWGOFS. This bug
causes modeled water temperature near jetties to be
unrealistically cold for NWGOFS
b. Resolve repeatability issue, important for FVCOM model
failure debugging
c. Add a new module to calculate heat flux for Great Lakes OFS
(mod_solar.F)
d. Add similar feature as in ROMS to prevent the water
temperature decreasing beyond the freezing point of water when
an ice model is not active
e. Implement other enhancements required by FVCOM-based Lake
Erie OFS implementation

Gridded and point forecast guidance from parallel runs will be
available in netCDF files on the NCEP NOMADS server
(para.nomads.ncep.noaa.gov) in the directory,

/pub/data/nccf/com/nos/para/

Graphics products are displayed on the CO-OPS web page at

http://tidesandcurrents.noaa.gov/ofs/dev/{OFS}/{OFS}.html

Where OFS is cbofs, dbofs, tbofs, ngofs, sfbofs, etc.

For concerning these changes, please contact:
Dr. Aijun Zhang
NOS/CO-OPS
Silver Spring, MD
Email: Aijun.Zhang@noaa.gov

For questions regarding the dataflow aspects with respect to the
NCEP FTP server, please contact:
Rebecca Cosgrove
NCEP/NCO Dataflow Team
College Park, MD
Email: ncep.list.pmb-dataflow@noaa.gov

National Technical Information Notices are online at:

http://www.weather.gov/os/notif.htm

$$





000
NOUS41 KWBC 271516
PNSWSH

Technical Implementation Notice 15-38
NOAA National Ocean Service Headquarters Washington DC
Relayed by National Weather Service Washington DC
1118 AM EDT Mon Jul 27 2015

To:       Subscribers:
          -Family of Services
          -NOAA Weather Wire Service
          -Emergency Managers Weather Information Network
          -NOAAPORT
           Other NWS and NOS partners and NWS and NOS employees

From:     Pat Burke
          Chief, Oceanographic Division
          NOS Center for Operational Oceanographic Products
          and Services (CO-OPS)

Subject:  Updating National Ocean Service Oceanographic Forecast
          Modeling Systems Effective October 6, 2015

Effective October 6, 2015 beginning at 15Z Coordinated Universal
Time (UTC) (10AM EST), updates of National Ocean Service
Operational Forecast Systems will be implemented on NOAA`s Weather
Climate Operational Supercomputing System (WCOSS) operated by NCEP
Central Operations (NCO). The updates include ROMS and FVCOM
version updating and shared framework (COMF) updates. COMF updates
include using NCO standard module files and other enhancements. The
details of this implementation are:

1. ROMS version Updates for CBOFS, DBOFS, and TBOFS

The core ocean model currently used for CBOFS, DBOFS and TBOFS
is ROMS3.6 v90 released in 2007, which is no longer supported by
ROMS developers at Rutgers University. The latest ROMS3.7
Version 766, released in June 2015, will replace the ROMS
version 90. Version 766 includes many bug fixes in ROMS version
90 and adds new features.

The horizontal and vertical mixing schemes for tracers are
replaced by Fourth-order Akima advection based on
recommendations of ROMS developers and semi-operational testing
results. A new option of C-preprocessor (CPP) in the surface
heat flux boundary condition subroutine (set_vbc.F) was
developed by Rutgers University to prevent the water temperature
decreasing beyond the freezing point of seawater (when a sea ice
model is not active). This option was tested by the CO-OPS
Modeling team using CBOFS and DBOFS and the expected results
were achieved. This option is critical for Cook Inlet OFS
(CIOFS), which will be implemented in FY16. There are not major
changes regarding hydrodynamics and physics in this version
compared with ROMS3.6 version 90. Therefore, the results
obtained from using ROMS3.6 and ROMS3.7 are similar for CBOFS,
DBOFS and TBOFS. There are no changes of CBOFS, DBOFS and TBOFS
products (e.g., file name and contents, deliver time, etc.) for
end users.

2. FVCOM version updates for NGOFS, NEGOFS, NWGOFS, and SFBOFS

FVCOM version updates will resolve and enhance the following
features:
a. Fix the jetty bug in the present FVCOM version used by NWGOFS
(vertvl_edge.F) which will currently impact NWGOFS. This bug
causes modeled water temperature near jetties to be
unrealistically cold for NWGOFS
b. Resolve repeatability issue, important for FVCOM model
failure debugging
c. Add a new module to calculate heat flux for Great Lakes OFS
(mod_solar.F)
d. Add similar feature as in ROMS to prevent the water
temperature decreasing beyond the freezing point of water when
an ice model is not active
e. Implement other enhancements required by FVCOM-based Lake
Erie OFS implementation

Gridded and point forecast guidance from parallel runs will be
available in netCDF files on the NCEP NOMADS server
(para.nomads.ncep.noaa.gov) in the directory,

/pub/data/nccf/com/nos/para/

Graphics products are displayed on the CO-OPS web page at

http://tidesandcurrents.noaa.gov/ofs/dev/{OFS}/{OFS}.html

Where OFS is cbofs, dbofs, tbofs, ngofs, sfbofs, etc.

For concerning these changes, please contact:
Dr. Aijun Zhang
NOS/CO-OPS
Silver Spring, MD
Email: Aijun.Zhang@noaa.gov

For questions regarding the dataflow aspects with respect to the
NCEP FTP server, please contact:
Rebecca Cosgrove
NCEP/NCO Dataflow Team
College Park, MD
Email: ncep.list.pmb-dataflow@noaa.gov

National Technical Information Notices are online at:

http://www.weather.gov/os/notif.htm

$$




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