FlexGrid
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NOTE: This page is being actively edited right now and the information might be incomplete.
FlexGrid documentation by Jiawei Zhuang (jiaweizhuang@g.harvard.edu)
Overview
FlexGrid is a new functionality in GEOS-Chem v11-02 to unify all metfield I/O routines by HEMCO.
HEMCO's interface and regridding&cropping capability allow users to
- Set up a nested simulation over any custom domains without changing model's source code.
- Explicitly control each meteorological variable in configuration files to perform various experiments (an interface resembling GCHP).
FlexGrid implementation plan
The table below shows the implementation plan for FlexGrid:
| Stage | Detail | Status |
|---|---|---|
| Stage 1: Read metfields by HEMCO | Enable the compile option "MET=flexgrid" to read any NetCDF-format metfields through HEMCO. This unifies "MET=geosfp" and "MET=merra2" |
|
| Stage 2: Implement custom nested simulations | Enable the compile option "NEST=cu" (custom) to allow custom nested simulations. |
|
| Stage 3: Grid-independent GEOS-Chem classic | Unify compile options "GRID=xxx" by moving all grid size parameters and resolution-dependent parameters to run-time configuration files. | No specific plan right now. Need to be traded off against the nested-GCHP development. |
FlexGrid for different types of users
User with different research focus and different computational resource can get different benefits from FlexGrid:
FlexGrid Stage 1 User's Guide
Compile
Set up run directory
Use FlexGrid functionalities
FlexGrid Stage 2 User's Guide
=== Issues to discuss