[WIP] Add capability to run GEOS-Chem at 0.125x0.15625 resolution #1980
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…lution NASA GMAO has provided 1-hourly mass flux fields for GEOS-FP meteorology at c720 resolution to drive GCHP. The mass flux fields have been converted to derived winds fields and further regridded from c720 to 0.125x0.15625 lat-lon resolution. The new files include the following collections and met fields: - GEOS.fp.asm.I1dyn : PS, SPHU - GEOS.fp.asm.A1dyn : U, V Signed-off-by: Melissa Sulprizio <mpayer@seas.harvard.edu>
msulprizio
added
category: Feature Request
Several IF statements have been expanded to include State_Grid%GridRes = 0.125x0.15625 resolution so that grid parameters and scale factors are properly determined. Also updated createRunDir.sh for GCClassic to correctly set transport and chemistry timesteps for 0.125x0.15625 resolution. For now the same default timesteps as 0.25x0.3125 and 0.5x0.625 will be used (transport=5 min, chemistry=10 min). This recommendation may later changed based on proper evaluation of the 0.125x0.15625 simulations. Signed-off-by: Melissa Sulprizio <mpayer@seas.harvard.edu>
…s for non-dynamic fields The 0.125x0.15625 files are only available for dynamic collections A1dyn and I1dyn. The remaining met fields when running at this resolution should be read at 0.25x0.3125. This file is currently hardcoded to use the North America (NA) files at 0.25x0.3125 resolution for testing, but this should be made more flexible in the future. The 0.125x0.15625 files have also been updated here so that daily files are used instead of hourly files. The use of daily 24-hour met field files has already been implemented in GEOS-Chem, but it does not currently know how to handle hourly files. Signed-off-by: Melissa Sulprizio <mpayer@seas.harvard.edu>
…tion Signed-off-by: Melissa Sulprizio <mpayer@seas.harvard.edu>
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There seems to be an issue in input_mod.F90 cutting off the longitude resolution string to 4 decimal places and changing 0.15625 to 0.1563. This causes differences in the longitude edge and center values saved to netCDF output. I will push a fix shortly and post difference plots to show the impact on model output. Tagging @xlwangg |
Xiaolin Wang identified the following bugs in the 12km simulations: 1. In GeosCore/pjc_pfix_window_mod.F90 for 12km code, we need to change the parameter dp in correspond with 12km resolution. 2. In the input_mod.F90, we need to improve floating point precision, otherwise the longitude resolution is 0.1563 rather than 0.15625. Signed-off-by: Melissa Sulprizio <mpayer@seas.harvard.edu>
msulprizio
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Apr 24, 2024
…n Wang The grid resolution option is expanded to include 0.125x0.15625. These modifications were obtained from Xiaolin Wang. These simulations require using the feature/0.125x0.15625_resolution in the GCClassic/src/GEOS-Chem repository (see also geoschem/geos-chem#1980). Signed-off-by: Melissa Sulprizio <mpayer@seas.harvard.edu>
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Name and Institution (Required)
Name: Melissa Sulprizio
Institution: Harvard / GCST
Describe the update
NASA GMAO has provided 1-hourly mass flux fields for GEOS-FP meteorology at c720 resolution to drive GCHP. The mass flux fields have been converted to derived winds fields and further regridded from c720 to 0.125x0.15625 lat-lon resolution. The new files include the following collections and met fields:
GEOS.fp.asm.I1dyn: PS, SPHUGEOS.fp.asm.A1dyn: U, VSo far only run directory files have been updated in this PR. The script
createRunDir.shhas been updated to include this resolution as an option when running with GEOS-FP meteorology. The use of this resolution and these fields is still being evaluated for it's impact on model output and performance.Expected changes
This update will not impact the full-chemistry benchmark simulations which are run at 4x5 resolution.
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