# gamil-dycore

**Repository Path**: dongli85/gamil-dycore

## Basic Information

- **Project Name**: gamil-dycore
- **Description**: A dynamical core for global atmospheric modeling
- **Primary Language**: FORTRAN
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-10-14
- **Last Updated**: 2022-06-20

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# Introduction

This is a redesign and reimplementation of GAMIL dynamical core (shortly as
dycore) developed in IAP/LASG. New dycore should be devised with the following
considerations ordered by priority from high to low:

- Switch between hydrostatic and nonhydrostatic (e.g. hydrostatic-pressure coordinate)
- Better vertical coordinate (e.g. SLEVE)
- Nonhydrostatic (e.g. filter vertical acoustic wave or implicit solver)
- Deep atmosphere
- Good extendability

**Currently, only a barotropic dycore is implemented, and we are working on a moving reduced tendency scheme to improve numerical stability around Poles.**

# Prerequistes

You should install the following software with proper version yourself:

- CMake
- NetCDF
- NCL

# Usages

Obtain the codes by using `git` command:

```
$ git clone https://github.com/dongli/gamil-dycore --recursive
```

Build the model:

```
$ cd build
$ FC=gfortran cmake ..
$ make
$ cd ..
```

There should be `dycore_test.exe` file generated.

Run the Rossby-Haurwitz wave test:

```
$ cd run
$ ../build/dycore_test.exe namelist.rh_test
$ ls rh_test.360x181.dt240.h0.*.nc
$ ncl -Q ../src/test_cases/barotropic/plot_rossby_haurwitz_wave_test.ncl file_prefix=\"rh_test.360x181.dt240\"
```

You can modify the namelist file `namelist.rh_test`, such change the time step size. There should be `rh_test.360x181.dt240.pdf` file depending on your modification of the namelist file.

Run the mountain zonal flow test:

```
$ cd run
$ ../build/dycore_test.exe namelist.mz_test
$ ls mz_test.360x181.dt240.h0.*.nc
$ ncl -Q ../src/test_cases/barotropic/plot_mountain_zonal_flow_test.ncl file_prefix=\"mz_test.360x181.dt240\"
```

There should be `mz_test.360x181.dt240.pdf`.

Other test cases:

- `jet_zonal_flow`
- `steady_geostrophic_flow`

# Authors

- Bin Wang
- Li Dong
- ...