Fig. 1: 2013–2022 springtime MDA8 O3 variations across 57 sites in the PRD.
From: Rapid increase in spring ozone in the Pearl River Delta, China during 2013-2022
a Spatial distribution of trends based on monthly MDA8 O3 anomalies following the method adopted by Cooper et al. 68. The color of the circles indicates the range of values, while the size of each circle represents the magnitude of the value within its respective range. b Probability density functions of spring daily MDA8 ozone. The thick blue and red lines represent 2013–2017 and 2018–2022 values, respectively.
