Fig. 1: Global and hemispheric time series of annual-mean tropical cyclone translation speed from the observations and simulations.
From: Global warming changes tropical cyclone translation speed

a–c The period of the time series is 1951–2011. Navy blue (red) line is for the observations (simulations). Yellow (blue) shading indicates the pre-satellite (post-geostationary satellite) era. Time series are shown for the global (a) data and for the Northern (b) and Southern (c) Hemisphere data. The period average annual-mean translation speed and one standard deviation in the pre-satellite (post-geostationary satellite) era are shown with p value using the two-tailed Student’s t test to assess the statistical significance of the difference between the observations and simulations in the bottom left (right) corner of each plot.