The evaluation of hydroclimatic variables over Nordic Fennoscandia using WRF‐CTSM

Mužić, I., Hodnebrog, Ø., Yilmaz, Y. A., Berntsen, T. K., Lawrence, D. M., et al. (2025). The evaluation of hydroclimatic variables over Nordic Fennoscandia using WRF‐CTSM. Journal of Geophysical Research: Atmospheres, doi:https://doi.org/10.1029/2024JD043103

Title The evaluation of hydroclimatic variables over Nordic Fennoscandia using WRF‐CTSM
Genre Article
Author(s) I. Mužić, Ø. Hodnebrog, Y. A. Yilmaz, T. K. Berntsen, David M. Lawrence, Negin Sobhani
Abstract This study is the first to evaluate the state‐of‐the‐art coupled land‐atmosphere regional climate model WRF‐CTSM. It comprises the Weather Research and Forecasting model, WRF, and the Community Terrestrial Systems Model, CTSM (using a configuration that is the same as the Community Land Model Version 5, CLM5). The evaluation is conducted over Nordic Fennoscandia (Norway, Sweden, and Finland) since there is uncertainty in climate models' representation of key hydroclimatic variables in high‐latitude regions as they experience accelerated transformation in a changing climate. A 13‐year WRF‐CTSM simulation (2010–2022) is performed using a 10.5 km horizontal grid spacing to assess the model biases in simulating mean, minimum, and maximum 2 m temperature, precipitation, snow cover (snow depth, snow water equivalent, fractional snow‐covered duration), and surface energy balance components. The analysis is based on annual, seasonal, monthly, and daily mean comparisons against openly available observational data sets, comprising regional scale gridded station‐based and satellite‐based data sets, as well as point scale observations from ground stations. The model shows robust agreement with the evaluation data sets across all considered variables. Furthermore, in situ scale conditions in 2 m temperature, precipitation, snow cover variables, and latent heat are captured with considerable precision. WRF‐CTSM is thus considered a powerful research tool for the assessment of land‐atmosphere interactions over Nordic Fennoscandia.
Publication Title Journal of Geophysical Research: Atmospheres
Publication Date May 16, 2025
Publisher's Version of Record https://doi.org/10.1029/2024JD043103
OpenSky Citable URL https://n2t.net/ark:/85065/d71c228d
OpenSky Listing View on OpenSky
CISL Affiliations HPCD, CSG

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