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

and the simulations is more important during its dissipation stage (not shown). ERA5 shows a strong correlation with the observations (0.87), which is higher than that of the simulations (Table 3). The time series of the correlation coefficient of ERA5 follows a pattern similar to that of the simulations, but it becomes higher than the correlation coefficients of the simula- tions during its dissipation stage (not shown). 3.3.3 Dew point temperature at 2 m. The aggregate statistics indicate that the simulations that have captured the PL do not show better skill at representing the dew point temperature than those that have not captured it (Table 4). Most simulations have lower ME than 24d12h and 24d18h (2.2˚C and 2˚C, respectively). All simulations have similar RMSE, ranging from 2.9 to 3.4˚C. Some simulations that have not captured the PL have weak correlation with the Fig 8. Time series of the (a) ME, (b) RMSE, and (c) Spearman correlation coefficient of the simulated and ERA5 SLP. The dataset used as reference to compute the ME is the SLP measured at surface stations and drifting buoys. https://doi.org/10.1371/journal.pone.0292250.g008 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 14 / 28