Figure 3
From: The impacts of COVID-19, meteorology, and emission control policies on PM2.5 drops in Northeast Asia
Trends of period-mean PM2.5 concentrations and meteorology, and emission control policy and COVID-19-driven impacts on the change of PM2.5 concentrations in the first half (December and January) and the second half (February and March) during 2016–2019 over China (including North, Central and South China) and South Korea (including SMA). The gray and blue lines indicate the PM2.5 trends in the first and second halves, respectively. The black dots are the averaged PM2.5 concentrations in the non-COVID-19 period (2016–2018) and the COVID-19 period (2019). The blue, yellow, and red bars indicate the meteorology, emission control policy and COVID-19-driven impacts on PM2.5 changes. The yellow, blue, and green regions are Northern, Central, and Southern China. The red region is SMA in South Korea (pink). The map was generated using Interactive Data Language version 8.7.0 (Harris Geospatial Solutions, http://harrisgeospatial.com) with Global Administrative Areas (http://gadm.org) map data.
