Fig. 2: Quantile regressions of tropical cyclone (TC) activity with western Atlantic basin spring Genesis Potential Index (GPI) values.
From: Earlier onset of North Atlantic hurricane season with warming oceans
Trends of 1st–99th percentile threshold date between 1979–2020 in days per April–May mean unit of GPI23 over 10–36°N, 100–70°W for (a) Atlantic Accumulated Cyclone Energy (ACE), (b) ACE over the continental United States (USACE), and (c) Atlantic ACE excluding short-lived TCs. d Mean values of April-May GPI from ERA5 reanalysis over 10–36°N, 100–70°W for 1979–2020, with the linear trend displayed with a dashed line. Light, medium, and dark shading indicates the 99%, 95%, and 90% confidence intervals, as in Fig. 1.
