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Signals of the Pandemic Seen in Greenhouse Gas Levels at the Harvard-Tsinghua Observatory near Beijing?

May 11, 2020

The below figures show cumulative probability distributions of carbon dioxide (CO2) and methane (CH4), the two leading greenhouse gases, as measured in March of 2019 (red) and 2020 (green) at the Harvard-China Project’s joint observatory with Tsinghua University at Miyun, north of Beijing. Depending on prevailing winds, the site sometimes measures clean background air from the northwest and sometimes polluted air from Beijing and surrounding areas. The lowest parts of the distributions represent background air, which have higher values in...

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