[Ncep.list.fv3-announce] NEMSfv3gfs and FV3 git repository updates 20190429

Jun Wang - NOAA Federal jun.wang at noaa.gov
Mon Apr 29 13:39:35 UTC 2019

Dear all,

Following changes were committed to the NEMSfv3gfs and FV3 repositories:

Ticket #61788 <https://vlab.ncep.noaa.gov/redmine/issues/61788>: enhance
restart capability for continuous accumulated diagnostic fields

Currently fv3 model can restart with minimal set of fields to ensure the
reproducibility of forecast integration. However some continuous
accumulated diagnostic fields are requested to output in model history
files, these fields are not computed correctly in current restart run as
the previous accumulations are not saved in restart file and their values
are lost. In this ticket, the restart capability is enhanced so that these
continuous accumulated diagnostic fields are output to restart file and all
the fields from the restart run have identical results to those from
non-restart run.

Two additional code changes are added to Ticket #61788
1) previous code change of removing time checking for coupled fields is
reversed. This change causes several coupled systems not to get updated
coupled fields. A solution that works for all the coupled system has been
worked on and will be committed later.
2) Several regression tests are still using old PBL scheme. These tests are
updated with the standard hybrid EDMF pbl scheme.

Ticket #61740 <https://vlab.ncep.noaa.gov/redmine/issues/61740>: Incorrect
units in calculation of Sfcprop%srflag for GFDL-MP

It is reported that the units in the calculation of Sfcprop%srflag for
GFDL-MP are incorrect in current master branch. A consistent unit (meter
per physics time step) is now used to compute the total precipitation. This
total precipitation is then used to compute the snow rain flag
(Sfcprop%srflag) for GFDLMP.

Due to above code changes, regression test baseline is changed. A new RT
baseline (trunk-20190424) is created and Regression test passes on theia
and wcoss(phase1/2, cray and dell). Thanks.

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