Mamani et al. (2026) Irrigation parameterization for the ICON model

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Identification

• Journal: bonndata
• Year: 2026
• Date: 2026-03-02
• Authors: Jane Leonor Roque Mamani, Arianna Valmassoi
• DOI: 10.60507/fk2/yiggoc

Research Groups

• German Weather Service (DWD)
• Max Planck Institute for Meteorology (MPI-M)

Short Summary

This study developed an irrigation parameterization for the ICON model to quantify the long-term impact of irrigation on surface and atmospheric variables over the EURO-CORDEX domain. Results indicate that irrigation leads to a cooling effect, increased latent heat flux and evapotranspiration, and decreased sensible heat flux in irrigated areas.

Objective

• Develop an irrigation parameterization for the ICOsahedral Nonhydrostatic model (ICON) and quantify its long-term impact on surface and atmospheric variables over the EURO-CORDEX domain using convection-permitting simulations.

Study Configuration

• Spatial Scale: EURO-CORDEX domain
• Temporal Scale: 12 years

Methodology and Data

• Models used: ICON (ICOsahedral Nonhydrostatic model) with TERRA land surface scheme and interface modules. The irrigation parameterization is an adaptation of Valmassoi et al. (2020) for the Weather Research and Forecasting Model (WRF).
• Data sources: Soil information (field capacity, permanent wilting point) for calculating Total Available Water (TAW); constant depletion fraction and root depth (in meters) for calculating Readily Available Water (RAW).

Main Results

• Irrigation significantly affects surface variables including 2-meter temperature, energy fluxes, evapotranspiration, and radiation variables.
• An irrigation cooling effect was observed in irrigated areas.
• Latent heat flux and evapotranspiration increased in irrigated regions.
• Sensible heat flux values decreased as a result of irrigation.

Contributions

• First development and implementation of an irrigation parameterization for the ICON model.
• Quantification of the long-term impact of irrigation on surface and atmospheric variables over the EURO-CORDEX domain using convection-permitting ICON simulations.
• Adaptation of an existing WRF irrigation parameterization for use in ICON, specifically defining daily irrigation volume as Readily Available Water (RAW).

Funding

• Not specified in the provided text.

Citation

@article{Mamani2026Irrigation,
  author = {Mamani, Jane Leonor Roque and Valmassoi, Arianna},
  title = {Irrigation parameterization for the ICON model},
  journal = {bonndata},
  year = {2026},
  doi = {10.60507/fk2/yiggoc},
  url = {https://doi.org/10.60507/fk2/yiggoc}
}