Satellite reveals a steep decline in China’s CO 2 emissions in early 2022

[SDU] Sciences of the Universe [physics] China Earth, Environmental, Ecological, and Space Sciences 330 550 13. Climate action [SDU]Sciences of the Universe [physics] SARS-CoV-2 Communicable Disease Control Life Science Humans COVID-19 Carbon Dioxide
DOI: 10.1126/sciadv.adg7429 Publication Date: 2023-07-21T17:58:59Z
ABSTRACT
Response actions to the coronavirus disease 2019 perturbed economies and carbon dioxide (CO 2 ) emissions. The Omicron variant that emerged in 2022 caused more substantial infections than in 2020 and 2021 but it has not yet been ascertained whether Omicron interrupted the temporary post-2021 rebound of CO 2 emissions. Here, using satellite nitrogen dioxide observations combined with atmospheric inversion, we show a larger decline in China’s CO 2 emissions between January and April 2022 than in those months during the first wave of 2020. China’s CO 2 emissions are estimated to have decreased by 15% (equivalent to −244.3 million metric tons of CO 2 ) during the 2022 lockdown, greater than the 9% reduction during the 2020 lockdown. Omicron affected most of the populated and industrial provinces in 2022, hindering China’s CO 2 emissions rebound starting from 2021. China’s emission variations agreed with downstream CO 2 concentration changes, indicating a potential to monitor CO 2 emissions by integrating satellite and ground measurements.
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