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The reduced human activities and associated decreases in aerosol emissions during the COVID‐19 pandemic are expected to affect climate. Assuming emission changes during lockdown, back‐to‐work and post‐lockdown stages of COVID‐19, climate model simulations show a surface warming over continental regions of the Northern Hemisphere. In January–March, there was an anomalous warming of 0.05–0.15 K in eastern China, and the surface temperature increase was 0.04–0.07 K in Europe, eastern U.S. and South Asia in March–May. The longer the emission reductions undergo, the warmer the climate would become. The emission reductions explain the observed temperature increases of 10–40% over eastern China relative to 2019. A southward shift of the ITCZ is also seen in the simulations. This study provides an insight into the impact of COVID‐19 pandemic on global and regional climate and implications for immediate actions to mitigate fast global warming.
originally posted by: ThatDamnDuckAgain
a reply to: 727Sky
The title and the text you quoted contradict each other.
Your title says the earth cooled, the text states the opposite (warmer).
I may just be confused by translation though, I leave that possibility open.
originally posted by: Bluntone22
a reply to: 727Sky
So if I’m reading this correctly, a slight reduction of emissions over a few months had a measurable effect on global warming.
Doesn’t this mean that all of the proposed draconian green new deals are way overkill?
Black carbon (BC) heats the atmosphere through absorbing solar radiation (Bond et al., 2013; Yang et al., 2017b) and influences the East Asian monsoon and frequency of the extreme ENSO events through thermodynamic and dynamic feedbacks (Lou et al., 2019a,b). BC can enhance the Arctic amplification when depositing on ice or snow surfaces
Fast climate responses to aerosol emission reductions during the COVID-19 pandemic
Black carbon is the sooty black material emitted from gas and diesel engines, coal-fired power plants, and other sources. It comprises a significant portion of particulate matter or PM, which is an air pollutant. Black carbon is a global environmental problem that has negative implications for both human health and our climate. Inhalation of black carbon is associated with health problems including respiratory and cardiovascular disease, cancer, and even birth defects. Black carbon also contributes to climate change causing changes in patterns of rain and clouds. Research findings and technical support will be provided to other EPA offices, the Global Alliance for Clean Cookstoves (GACC), the Partnership for Clean Indoor Air (PCIA) and other partners to: Set global standards for cleaner stoves and fuels Improve current stove designs while taking socio-economic costs into account for those affected. As black carbon deposits in the Arctic, the particles cover the snow and ice, decreasing the Earth’s ability to reflect the warming rays of the sun, while absorbing heat and hastening melt.
Black Carbon Research
Snow covered regions are the most vulnerable to the warming effects of black carbon, and any particles reaching them are of concern if they are darker than snow, because they can reduce reflectivity and speed melting. Glaciers are melting in the Andes, the Rocky Mountains, the Canadian Rockies, the Alps, the Himalayas and around the world. As glaciers melt and retreat, the ice melt that during the dry season feeds the rivers that supply irrigation systems will dwindle. The glaciers of the Himalayas and the Tibetan Plateau sustain the rivers of China and India and are critical to the fresh water and food supplies of these two countries.