Fig. 2: Spatial and temporal patterns in med-high density smoke cover in California (CA) and at study sites between 2006 and 2022.
From: Wildfire smoke reduces lake ecosystem metabolic rates unequally across a trophic gradient
a Maps showing study sites (colored dots) and the annual number of days with med-high density smoke cover from 2018 to 2021 (red color gradient). Sites that are close together (ex. 5 lakes and ponds in Sequoia NP, multiple locations within the same lake) are represented by a single point. b Boxplots show the maximum spatial extent of med-high density smoke observed in each month (percentage of CA’s area; 2006−2022). Horizontal lines in boxplots show medians, box extents show the interquartile range (IQR), whiskers extend to the greatest or smallest values within 1.5 times the IQR, and data outside this range are shown as points (outliers). Smoke cover extent in September and October of 2020 and 2021 (red labeled points) were outliers. c Time series of the maximum spatial extent of med-high density smoke (averaged across months June-October; points connected with solid black lines). Study years are shown as red points. The dashed line shows a significant linear trend in maximum spatial extent through time (Sen’s slope). d Time series of the total annual days with med-high density smoke cover at study sites (points connected by solid lines, colors correspond to study sites), from 2006 to 2022. Data from study sites in close spatial proximity are not shown.
