Figure 6

Composite mean daily evolution of SST (°C) from 10 days (Day -10) prior to the onset to 2 days before the onset (Day -2) for Early (extreme left), Late onset (middle) and its differences (extreme right). Dots indicate 95% confidence level based on a two tailed t-test. The maps in the figure are generated using NCL software [The NCAR Command Language (Version 6.6.2) [Software]. (2019). Boulder, Colorado: UCAR/NCAR/CISL/TDD. http://dx.doi.org/10.5065/D6WD3XH5].