FIGURE 1. Analysis and model results of satellite-derived tropical cyclone lifetime-maximum wind speeds.
From the following article:
The increasing intensity of the strongest tropical cyclones
James B. Elsner, James P. Kossin & Thomas H. Jagger
Nature 455, 92-95(4 September 2008)
doi:10.1038/nature07234
a, Box plots by year. Trend lines are shown for the median, 0.75 quantile, and 1.5 times the interquartile range. b, Trends in global satellite-derived tropical cyclone maximum wind speeds by quantile, from 0.1 to 0.9 in increments of 0.1. Trends are estimated coefficients from quantile regression in units of metres per second per year. The point-wise 90% confidence band is shown in grey, under the assumption that the errors are independent and identically distributed. The solid red line is the trend from a least-squares regression of wind speed as a function of year and the dashed red lines delineate the 90% point-wise confidence band about this trend.
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