Dear Mr. Yuan!
You spotted an important point. There are positive impacts:
1) Mousazadeh, M., Paital, B., Naghdali, Z. et al. Positive environmental effects of the coronavirus 2020 episode: a review. Environ Dev Sustain (2021). https://doi.org/10.1007/s10668-021-01240-3 Open access: Article Positive environmental effects of the coronavirus 2020 episo...
2) J. C. Fyfe et al. (2021). Quantifying the influence of short-term emission reductions on climate, Science Advances 05 Mar 2021:Vol. 7, no. 10, eabf7133 DOI: 10.1126/sciadv.abf7133, Open access: https://advances.sciencemag.org/content/7/10/eabf7133
3) A case-study: Swades Pal et al. (2021). Effects of lockdown due to COVID-19 outbreak on air quality and anthropogenic heat in an industrial belt of India, Journal of Cleaner Production, Volume 297, 15 May 2021, Open access: Article Effects of lockdown due to COVID-19 outbreak on air quality ...
Yours sincerely, Bulcsu Szekely
No, I do not think so.
Highways are full of vehicles everywhere !
Some decline in air traffic can be registered
and may have a slight effect.
COVID-19 lockdown caused 50 percent global reduction in human-linked Earth vibrations. Here goes: https://www.imperial.ac.uk/news/200454/covid-19-lockdown-causes-50-global-reduction/
However long it may last, the "pandemic" cannot affect the climate.
The climatic variations, whether short, medium or long term, derive from phenomena that really involve the entire planet and for long periods of time (at least ten years).
If you look at the climate chart over the last 15,000 years, as derived from the Greenland ice cores, the world temperature is actually cooling. This is reinforced by barometric pressure data over the last 50 years, which shows steadily rising air pressure. Cold air is heavier. Rising pressure means cooling.
I doubt that COVID will have any effect since the statistics of all the nations (except America) show no increase in mortality in 2020 as compared to the ten previous years.
As viewed from satellite urban pollution dropped a year ago (https://www.space.com/italy-coronavirus-outbreak-response-reduces-emissions-satellite-images.html ; https://www.space.com/coronavirus-impacts-emissions-china-night-lights.html ; https://www.space.com/nasa-satellite-air-pollution-us-northeast-coronavirus.html) , but levels are returning to pre-pandemic levels as restrictions ease and people avoid public transport: https://www.cnn.com/2021/03/16/us/covid-air-pollution-return-trnd/index.html
Com a maioria da população confinada, a poluição e os deslocamentos diminuem, melhorando a qualidade do ar.
Dear Dan Yuan,
Yes, but the magnitude of this positive impact is very small.
Regards,
Dariusz Prokopowicz