CATChem Processes¶

This section contains documentation for all available CATChem processes.

Overview¶

CATChem processes are modular components that implement specific atmospheric physics or chemistry mechanisms. Each process follows a standardized interface and can be configured independently.

Process Categories¶

Emission Processes¶

Source processes that add species to the atmosphere: - Anthropogenic emissions - Biogenic emissions - Dust emissions - Sea salt emissions

Transformation Processes¶

Processes that convert species through chemical or physical mechanisms: - Gas-phase chemistry - Aerosol chemistry - Particle settling - Coagulation

Loss Processes¶

Removal processes that remove species from the atmosphere: - Dry deposition - Radioactive decay - Photolysis

Transport Processes¶

Processes that move species spatially: - Advection - Turbulent mixing - Convective transport

Multi-Phase Processes¶

Processes involving multiple atmospheric phases: - Aqueous chemistry (gas-liquid) - Heterogeneous chemistry (gas-solid) - Phase transitions

Available Processes¶

SeaSalt - SeaSalt atmospheric process
Dust - Dust atmospheric process
Dust - Emission process (sources)
CleanTest - Emission process (sources)
SeaSalt - Emission process (sources)
TestProcess - Emission process (sources) This section will be automatically updated as new processes are generated.

Using Processes¶

Basic Configuration¶

All processes are configured through YAML files:

processes:
  - name: process_name
    enabled: true
    scheme: scheme_name
    species: [species_list]
    parameters:
      param1: value1
      param2: value2
    diagnostics: [diagnostic_list]

Process Interface¶

All processes implement the standard interface:

type, extends(ProcessInterface) :: MyProcessType
contains
  procedure :: init => my_process_init
  procedure :: run => my_process_run
  procedure :: finalize => my_process_finalize
end type

Creating New Processes¶

See the Process Generator Tutorial for detailed instructions on creating new processes.

Process Development¶

For information on developing processes manually or extending generated processes: