Fig. 4From: Multi-year assessment of the impact of ship-borne radiosonde observations on polar WRF forecasts in the ArcticHorizontal distributions of temporal mean (contour; contours from 5340 to 5700 by 60 gpm) and standard deviation (shading; gpm) of 500-hPa geopotential height for the year a 2017, b 2018, c 2019, and d 2021. Temporal mean and standard deviation are calculated over the cycling period of the corresponding year. Locations of radiosonde launches (black dots) are also shownBack to article page