Assessment of simulations of a polar low with the Canadian Regional Climate Model

observations, whereas the other simulations, including those that represent the PL, have mod- est correlation with the observations. Although the time series of the ME of each simulation is quite different, all the simulations show a positive ME during all or almost all the time Fig 9. Scatterplots displaying, for each simulation, the relationship between the simulated 2-m temperature and the 2-m temperature measured at the surface stations. The scatterplot on the bottom displays the relationship between the ERA5 2-m temperature and the observed 2-m temperature. The red line represents the regression line that would correspond to a perfect match between the values. https://doi.org/10.1371/journal.pone.0292250.g009 Table 3. Aggregate statistics computed to verify the simulated and ERA5 2-m temperature against the observa- tions from surface stations. ME [˚C] RMSE [˚C] r 23d00h 1 2 0.75 23d06h 0.8 1.9 0.74 23d12h 1.7 2.3 0.74 23d18h 1.2 2 0.73 24d00h 1.3 2.1 0.75 24d06h 1.2 1.9 0.77 24d12h 2 2.4 0.78 24d18h 2 2.4 0.78 ERA5 0.9 1.5 0.87 https://doi.org/10.1371/journal.pone.0292250.t003 PLOS ONE Assessment of simulations of a polar low with the canadian regional climate model PLOS ONE | https://doi.org/10.1371/journal.pone.0292250 October 5, 2023 15 / 28