Anticipating the Novel Coronavirus Disease (COVID-19) Pandemic.

We find that NO 2 column quantities started following a decreasing trend during the last week of February in Italy and the US, which indicates a partial unofficial closure of anthropogenic activities, taking into consideration that the official COVID-19-induced lockdown was enforced on March 09 and around March 25 in Italy and the US, respectively.

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We observe that the short-term memory of the time series data exhibits an increasing trend in most of the countries ( Figure 2 ).

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