Fig. 3: Quantile regressions of Accumulated Cyclone Energy (ACE) with genesis parameters.
From: Earlier onset of North Atlantic hurricane season with warming oceans
Trends of Atlantic ACE 1st–99th percentile threshold date between 1979–2020 in days per April–May mean (a) sea surface temperatures (SST; °C), (b) 200 hPa temperatures (°C), (c) 600-hPa relative humidity (RH; %), (d) 850-200-hPa vertical wind shear (VWS; m s−1) over 10–36°N, 100–70°W. Mean values of April-May (e) ERSSTv5 SST (°C), (f) ERA5 200 hPa temperatures (°C), (g) ERA5 RH (%), and (h) ERA5 VWS (m s−1) over 10–36°N, 100–70°W for 1979–2020. Light, medium, and dark blue shading in (a–d) indicates the 99%, 95%, and 90% confidence intervals, as in Fig. 1.
