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eCLM-ParFlow: High ice concentrations when using dev-soil-ice branch  #66

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eCLM-ParFlow: High ice concentrations when using dev-soil-ice branch #66
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biogeophysicsIssues related to biogeophysical aspects of eCLM.coupled-parflowIssues related to eCLM-ParFlow coupling

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@kvrigor
kvrigor
opened on May 15, 2025

Migrated from https://gitlab.jsc.fz-juelich.de/HPSCTerrSys/tsmp-internal-development-tracking/-/issues/62

Originally reported by Mikael Kaandorp (Nov. 13, 2023).

To summarize; in the coupled simulations the volumetric soil moisture (H2OSOI) reaches unphysical values of much larger than 1 (I observed values larger than 10). When splitting the volumetric soil moisture in its liquid (SOILLIQ) and frozen (SOILICE) components, the liquid part looks reasonable (<1.0), the frozen part not so much. See the figures below, where I plotted the different variables at the end of february:

H2OSOI

SOILICE converted to volumetric soil ice

SOILLIQ converted to volumetric soil water

  • Input files and namelists: /p/project/cjibg36/kaandorp2/eTSMP_setups/setup_etsmp_cordex_444x432_v2
  • ERA5 forcing files: /p/largedata/jibg36/kaandorp2/setup_TSMP_DA/ERA5_EUR-11_CLM/

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  1. kvrigor
    added a parent issue on May 15, 2025

  2. kvrigor commented on May 15, 2025

    @kvrigor
    kvrigor
    on May 15, 2025
    MemberAuthor

    More from Haojin Zhao (reported June 7, 2024):

    To investigate ice coupling behavior, I modified the start date in drv_in from the original 1 July, 2017 to 1 Jan, 2017, as this colder period is more suitable for evaluation. Simulations were run for both the no-ice and dev-soil-ice repositories, focusing on the surface layer (0.02m depth). Here's a summary of the findings:

    1. The simulations from both runs give in general similar results for the variable H2OSOI.

    Diffs in H2OSOI

    1. Unrealistic values (>1) observed in the northern part appear to have vanished when compared with previous simulations by Mikael's, but still exists in central Europe. Note that the unrealistic soil moisture are only found in the first surface layer.

    SOILICE
    SOILLIQ

  3. AGonzalezNicolas
    added
    coupled-parflowIssues related to eCLM-ParFlow coupling
    on May 15, 2025

  4. kvrigor commented on May 15, 2025

    @kvrigor
    kvrigor
    on May 15, 2025
    MemberAuthor

    TODO

  5. kvrigor
    removed a parent issue on May 22, 2026
  6. kvrigor
    added a parent issue on May 22, 2026
  7. kvrigor
    changed the title [-]eCLM-ParFlow: high ice concentrations[/-] [+]eCLM-ParFlow: High ice concentrations when using `dev-soil-ice` branch [/+] on May 22, 2026
  8. kvrigor
    linked a pull request that will close this issueeCLM-ParFlow: Ice impedance #140on Sep 4, 2026
  9. kvrigor
    added
    biogeophysicsIssues related to biogeophysical aspects of eCLM.
    on Sep 30, 2026
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