# atmosphere Section

This section configures **atmospheric forcing** settings, including **wind**, **pressure**, **temperature**, and **radiation** parameters.

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 | **Parameter** | **Description** |
 |---------------|----------------|
 | `atmosphere_flag` | Flag to enable/disable atmospheric forcing (`TRUE`, `FALSE`). |
 | `pressure_flag` | Flag to enable/disable atmospheric pressure forcing (`TRUE`, `FALSE`). |
 | `pressure_directory` | Directory for atmospheric pressure input files (default: `AUTO`). |
 | `pressure_convention` | Filename formatting convention for pressure forcing (default: `AUTO`). |
 | `pressure_variable` | Variable name for atmospheric pressure (default: `MSL`). |
 | `pressure_equivalent_water_density` | Equivalent water density for pressure conversion (default: `1019.368`). |
 | `IB_equivalent_water_density` | Equivalent water density for inverse barometer (default: `1019.368`). |
 | `wind_flag` | Flag to enable/disable wind forcing (`TRUE`, `FALSE`). |
 | `uwind_variable` | Variable name for eastward wind (default: `U10M`). |
 | `vwind_variable` | Variable name for northward wind (default: `V10M`). |
 | `temperature_flag` | Flag to enable/disable temperature forcing (`TRUE`, `FALSE`). |
 | `surface_air_temperature` | Variable name for surface air temperature (default: `T2m`). |
 | `surface_water_temperature` | Variable name for surface water temperature (default: `SST`). |
 | `long_wave_radiation` | Flag to enable/disable long-wave radiation (`TRUE`, `FALSE`). |
 | `short_wave_radiation` | Flag to enable/disable short-wave radiation (`TRUE`, `FALSE`). |
 | `atmospheric_directory` | Directory for atmospheric forcing files. |
 | `file_format` | Format of atmospheric forcing files (`NETCDF`, `GRIB`, `CLX`, `ACADEMIC`, `HARMONIC`). |
 | `file_endian` | Endianness of atmospheric forcing files (`UNIX`, `LINUX`). |
 | `file_convention` | Filename construction rules for atmospheric forcing files. |
 | `MaskFile` | File for land/sea mask (`FILE`, `NONE`, `AUTO`). |
 | `mask_variable` | Variable name for land/sea mask. |
 | `apply_landsea_mask` | Flag to apply land/sea mask on meteorological fields (`TRUE`, `FALSE`). |
 | `keep_mean_pressure` | Flag to keep mean pressure (`TRUE`, `FALSE`). |
 | `keep_mean_wind` | Flag to keep mean wind (`TRUE`, `FALSE`). |
 | `time_interpolation` | Time interpolation method (`LINEAR`, `QUADRATIC`). |
 | `bulk_formula` | Bulk formula for wind stress (`CLASSIC`, `BULK`, `BULK-REDUCED`, `FRICTION-VELOCITY`, `WIND-STRESS`, `METEO-BULK-CHARNOK`). |
 | `wind_stress` | Wind stress mode (`BULK`, `MODEL`). |
 | `inversebarometer` | Flag to use inverse barometer in open boundary conditions (`TRUE`, `FALSE`). |
 | `verbose_level` | Verbosity level for atmospheric forcing (`NONE`, `MINIMAL`, `DEBUG`). |