Emulator Components

The Emulator Components framework provides AI-based replacements for computationally expensive E3SM component models. By leveraging trained neural network emulators, these components enable faster-than-real-time coupled climate simulations while maintaining physical fidelity.

Overview

The emulator framework is designed with extensibility in mind:

• Base Framework (common/) — Shared infrastructure for all emulator types
• Atmosphere Emulator (eatm/) — AI-based atmosphere component using ACE or similar models

graph TD
    A[EmulatorComp Base Class] --> B[EmulatorAtm]
    A --> C[EmulatorOcn - Future]
    A --> D[EmulatorLnd - Future]
    B --> E[STUB Backend]
    B --> F[LibTorch Backend]

Key Features

Feature	Description
MCT Coupling	Full integration with E3SM's Model Coupling Toolkit
Multiple Backends	STUB (testing), LibTorch (production C++)
Grid Flexibility	Supports various grid configurations via SCRIP files
MPI Parallel	Distributed across multiple processors

Documentation

• Quick Start — Get running with EATM
• Architecture — Technical design and class hierarchy
• Inference Backends — AI model integration options
• Standalone Build — Build without CIME for development

API Reference

Browse the Doxygen-generated API documentation:

Resource	Description
Class List	All classes with descriptions
Class Hierarchy	Inheritance relationships
Namespace List	Namespace organization
Files	Source file listing

Current Status

Note

The Emulator Components framework is under active development. Currently, the Atmosphere Emulator (EATM) is the primary supported component.