[Ncep.list.emc.fv3gfs_tickets] FV3GFS Ticket #18: update to global_chgres and regrid_nemsio

[FV3GFS Trac Ticket]

#18: update to global_chgres and regrid_nemsio
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  Reporter:  philip.pegion@…  |      Owner:  Philip Pegion
      Type:  enhancement      |     Status:  new
  Priority:  major            |  Milestone:
 Component:  component1       |    Version:
Resolution:                   |   Keywords:
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Comment (by fanglin.yang@…):

 In NCEP POST two different algorithms are used for deriving sea-level
 pressure. They probably can be used for vertical interpolation below
 terrain as well. One is the constant lapse rate method, with a Shuwll
 correction.  Results can be very noisy over mountainous terrain in higher-
 resolution model runs.   The second is membrane method: Underground
 temperatures recomputed by relaxing using successive overrelaxation
 (Poisson equation).
 Hydrostatic integration of this smooth underground temperature field
 yields a much smoother SLP field.  See www.dtcenter.org/nems-
 nmmb/users/tutorial/upp_tutorial_for_nmmb_2015.pptx for more detail.

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Ticket URL: <https://svnemc.ncep.noaa.gov/trac/fv3gfs/ticket/18#comment:4>
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