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jimfrimel / jfHWRF

My HWRF repository for tracking issues and tasks.
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CldOvlp_2018VP CC #9

Closed jimfrimel closed 5 years ago

jimfrimel commented 5 years ago

The CldOvlp_2018VP branch changes have passed the CC and have been merged back in to the HWRF branch of WRF, and the HWRF scripts.

See the commit logs HWRF scripts: https://svn-dtc-hwrf.cgd.ucar.edu/trunk svn log -r6349 -v

For WRF: https://github.com/wrf-model/WRF/commit/2b585150537 https://github.com/wrf-model/WRF/commit/e9eabed5f93

jimfrimel commented 5 years ago

Changes to the CldOvlp_2018VP merge into HWRF, as a result

of the Consistency Check.

When running the Consistency Check we found the operational HWRF answers had slightly changed when the trunk is run with default settings (cldovrlp=4 and idcor=0).

This difference was a result of changing the decorrelation length to the inverse and multiplying instead of keeping it as division.

was changed to this: alpha(i, ilev) = exp( -(hgt(i,ilev) - hgt(i,ilev-1)) * Zo_inv(i))

is now this: alpha(i, ilev) = exp( -(hgt(i,ilev) - hgt(i,ilev-1)) / Zo(i))

Mathematically the two equations are equivalent, but results in rounding/precison differences when computing.

This change reverts back to dividing and the CC now passes.