Fig. 4: Wildfire upwind exposure estimation. | Nature Communications

Fig. 4: Wildfire upwind exposure estimation.

From: Wildfire smoke impacts respiratory health more than fine particles from other sources: observational evidence from Southern California

Fig. 4

The relationship between a given zip code centroid and a fire centroid is assessed by means of geospatial tools. Fires burning upwind are considered within the context of the north-easterly direction of Santa Ana Winds. We use the distance between centroids, as well as the angle of the spatial relationship as shown here, to classify a zipcode day as exposed (or not).

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