[Ncep.list.emc.fv3gfs_tickets] FV3GFS Ticket #17: Explore use of GMTED2010 terrain data
FV3GFS Trac Ticket
ncep.list.emc.fv3gfs_tickets at noaa.gov
Tue Aug 15 21:11:26 UTC 2017
#17: Explore use of GMTED2010 terrain data
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Reporter: george.gayno@… | Owner: george.gayno@…
Type: task | Status: accepted
Priority: major | Milestone:
Component: component1 | Version:
Resolution: | Keywords: GMTED2010
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Comment (by george.gayno@…):
One final test of the impact of switching from "-O0" to "-O3" for the Cray
build (done at r96596, see comment:8). A uniform C768 grid was tested and
the raw orography fields were checked.
Timing: The "-O3" orography generation test ran in 4:51, and the "-O0"
test ran in 9:43.
Differences in the raw orography were confined to the center row and
column of each tile. Some tiles had differences along a tile edge. The
max/min differences for each tile were:
* Tile 1, minus 15 to 9 meters
* Tile 2, minus 12 to 9 meters
* Tile 3, minus 1.5 to 2.5 meters
* Tile 4, minus 5 to 5 meters
* Tile 5, minus 8 to 6 meters
* Tile 6, minus 0.9 to 1.8 meters
A graphic to follow.
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Ticket URL: <https://svnemc.ncep.noaa.gov/trac/fv3gfs/ticket/17#comment:13>
fv3gfs <https://svnemc.ncep.noaa.gov/trac/fv3gfs>
NGGPS FV3GFS Development
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