CESM1_0_4 Major Features FAQ

  • Interannual forcing (IAF) compsets

    • See the CESM1 POP2 FAQ for information about the new IAF compsets and how to use them.

  • Thermosphere/Ionosphere extension of WACCM (WACCM-X)

    • Q: What is WACCM-X?
    • A: WACCM-X is an optional addition to WACCM that extends the model into the upper thermosphere, using an additional 15 vertical layers to cover this range. WACCM-X's ionosphere energetics and ion transport are still under development. For more details on the scientifically validated features of WACCM-X, please see WACCM-X Notable Improvements.

    • Q: What compset should I use for WACCM-X?
    • A: The new compset for WACCM-X is F_2000_WACCMX (short name: FWX). You can specify either the long name or the short name for the -compset option of create_newcase.

    • Q: What grid do I use with a WACCM-X case?
    • A: The only scientifically supported grid for WACCM-X at this time is 1.9x2.5_1.9x2.5 (short name: f19_f19), which was used for the initial control run.

    • Q: Does WACCM-X require any additional options or configuration?
    • A: There are no new settings or options exclusive to WACCM-X. Currently, a WACCM-X case is configured in exactly the same way as the corresponding WACCM case would be.