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

the other simulations is negative from 1600 UTC on (not shown). Overall, the RMSE of 24d12h and 24d18h increases from 1100 UTC on, and the latter has smaller RMSE than the rest of the simulations most of the time (Fig 11B). The time series of the Spearman correlation coefficient varies widely between simulations, with correlation coefficients ranging from -0.19 to 0.85, and even the same simulation shows a wide range of correlation coefficients (not shown). The aggregate ME of ERA5 (1.9 m s-1) is almost twice as that of the simulations that have captured the PL, but its RMSE (3.9 m s-1) is lower and its correlation coefficient is higher (0.81) (Table 7). However, the difference in the RMSE and the correlation coefficient between ERA5 and 24d18h is very small. Like the simulations that have captured the PL, the ME of Fig 11. Time series of the (a) RMSE-VWD of the simulated and ERA5 10-m wind, and RMSE of the simulated and ERA5 (b) wind gusts and (c) 1-h accumulated precipitation. The datasets used as reference to compute the RMSE-WVD and RMSE are the observations at surface stations. https://doi.org/10.1371/journal.pone.0292250.g011 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 19 / 28