Trends in Global NO2 Emissions in the First Quarter of 2020
NASA Satellite Data Visualization
Figure 1: China NO2 tropospheric column density, screened for Cloud Fraction <30%( 1e+14 molec/cm2) for the first quarter (Q1),2020
In Italy, NO2 emissions data followed a different pattern than in China. In February, NO2 emissions were only marginally lower than in January. However, consistent with manufacturing shut downs, March 2020 data showed visible decreases in NO2 emissions (see Figure 2).
Figure 2: Italy NO2 tropospheric column density, screened for Cloud Fraction <30%( 1e+14 molec/cm2) for the first quarter (Q1),2020.
In the United States, the atmospheric NO2 emissions are substantially lower than in China (Figure 3; note the scale differences in Figures 1 and 3). NO2 emissions decreased between January and February and again, between February and March. Example locations with visible decreases in atmospheric NO2 emissions were around Houston, the New York City area, and Los Angeles. The mid-Atlantic region had NO2 emissions similar to January 2020.
Figure 3: United States NO2 tropospheric column density, screened for Cloud Fraction <30%( 1e+14 molec/cm2) for the first quarter (Q1),2020
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2 Source data: Ozone Monitoring Instrument (OMI) on NASA’s Aura satellite (https://disc.gsfc.nasa.gov/)