New E3SM Tutorials: EAMxx and Offline Land Model Testbed (OLMT)
The 2025 Energy Exascale Earth System Model (E3SM) All-Hands Meeting, in addition to plenary sessions and project updates, featured hands-on tutorials designed to deepen participants’ understanding of key tools and workflows within the E3SM framework. These sessions focused on the EAMxx (the next generation E3SM Atmosphere Model in C++) and the OLMT (Offline Land Model Testbed), offering attendees practical guidance on using and customizing these essential components.
Both tutorials were recorded and all the materials, presentations and videos are publicly available.
EAMxx Tutorial
The tutorial, led by Aaron Donahue and Naser Mahfouz, provided a comprehensive walkthrough of the EAMxx model’s capabilities and development workflows. The session began with an introduction to running and modifying EAMxx cases, including runtime options and output control using Namelist and YAML files. Participants explored running doubly periodic simulations and building unit tests to validate model processes. The second part of the tutorial focused on adding new processes to EAMxx, with detailed explanations of the process interface and steps for integrating new functionality into the model. Open exercises allowed attendees to apply what they learned, fostering hands-on engagement and collaborative problem-solving.
OLMT Tutorial
This tutorial presented by Daniel Ricciuto, offered an in-depth look at the Offline Land Model Testbed, a tool for evaluating and customizing land model configurations. The session began with an overview of OLMT’s connections to other utilities and key resources for getting started. Participants learned how to set up runscripts, including defining paths, selecting run types, and customizing configurations for specific research needs. The tutorial also covered ensemble setups and featured a live demonstration to illustrate the workflow in action. By the end of the session, attendees had gained practical insights into leveraging OLMT for land model testing and development.
Recordings and resources from both sessions are publicly available, ensuring continued access to these valuable training materials.
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