Fig. 1: Example and illustration of the spatiotemporally contiguous events tracking.
From: Two different propagation patterns of spatiotemporally contiguous heatwaves in China
a An example of a contiguous heatwave event that propagated eastward from 21 June to 23 June 1961, with black dots marking the intensity-weighted centroid throughout all participating days of the event. b An illustration of the 3D tracking of spatiotemporally contiguous heatwaves. Pink cell indicates that there is a heatwave day, while gray indicates not. The tracking process in b starts with the lower-left red cell in Step 1, and it searches the connected heatwave day in neighboring pink cells (Steps 2–4). It keeps searching until all connected cells are assigned to a contiguous event (Step 4).
