Article: Limited Regional Aerosol and Cloud Microphysical Changes Despite Unprecedented Decline in Nitrogen Oxide Pollution During the February 2020 COVID-19 Shutdown in China.
2020 Volume 47, Issue 17, Page(s) e2020GL088913
Abstract: ... value, but regional-scale column aerosol loadings and cloud microphysical properties were not detectably ... that nitrogen dioxide pollution declined by an unprecedented amount (~50% regionally) from its expected unperturbed ... Following the emergence of a novel coronavirus in Wuhan, China instituted shutdown measures ...
| Abstract | Following the emergence of a novel coronavirus in Wuhan, China instituted shutdown measures starting in late January and continuing into February 2020 to arrest the spread of disease. This resulted in a sharp economic contraction unparalleled in recent Chinese history. Satellite retrievals show that nitrogen dioxide pollution declined by an unprecedented amount (~50% regionally) from its expected unperturbed value, but regional-scale column aerosol loadings and cloud microphysical properties were not detectably affected. The disparate impact is tied to differential economic impacts of the shutdown, in which transportation, a disproportionate source of nitrogen oxide emissions, underwent drastic declines (~90% reductions in passenger traffic), whereas industry and power generation, responsible for >90% of particulate emissions, were relatively less affected (~20% reductions in electricity and thermal power generation). A combination of anomalously warm and humid meteorological conditions and complex chemical interactions further decreased nitrogen dioxide concentrations but likely enhanced secondary aerosol formation. |
|---|---|
| Keywords | covid19 |
| Language | English |
| Publishing date | 2020-08-25 |
| Publishing country | United States |
| Document type | Journal Article |
| ZDB-ID | 7403-2 |
| ISSN | 0094-8276 |
| ISSN | 0094-8276 |
| DOI | 10.1029/2020GL088913 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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