Days with heavy smoke have been increasing across California

Annual increase between 2011 and 2020

Source: National Oceanic and Atmospheric Administration NOTES: Adapted from processed NOAA data in Burke et al 2022 (www.nature.com/articles/s41562-022-01396-6). Map shows annual increase in number of days with smoke plumes designated as 'heavy' by National Oceanic and Atmospheric Administration (NOAA) analysts, their densest plume classification, characterized by a density of 27 μg/m3. Estimates are based on linear models that capture the variation in number of days with heavy smoke density from 2011 to 2020. FROM: PPIC Blog, December 2023 Get the data Embed