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The Arctic Has a Cloud Problem

The Atlantic Tiny iodine particles are clumping together to trap sunlight and melt polar sea ice. Christian Vorhofer/ imageBROKER / Alamy To climate scientists, clouds are powerful, pillowy paradoxes. They can reflect away the sun’s heat but also trap it in the atmosphere; they can be products of warming temperatures but can also amplify their effects. Now, while studying the atmospheric chemistry that produces clouds, researchers have uncovered an unexpectedly potent natural process that seeds their growth. And as the Earth continues to warm from rising levels of greenhouse gases, this process could be a major new mechanism for accelerating the loss of sea ice at the poles one that no global climate model currently incorporates.

Intergovernmental panel on climate changeIntergovernmental panel on climateFifth assessment reportIntergovernmental panelClimate changeClimate scientistsStudies of aerosolsTiny particlesGlobal climate modelCloud chamberAtmospheric chemistrySenior scientistLoss of sea iceClimate modelsUrban areasAtmospheric research

Covid Cut Gases That Warm the Globe But a Drop in Other Pollution Boosted Regional Temperatures

Covid-19 Cut Gases That Warm the Globe But a Drop in Other Pollution Boosted Regional Temperatures A new study shows how tiny aerosol particles from industrial emissions have an outsized cooling effect. February 15, 2021 Two Iranian men wearing protective face masks walk along the Azadi (Freedom) Square in western Tehran during a spike in air pollution following the Covid-19 outbreak in Iran, on January 12, 2021. Credit: Morteza Nikoubazl/NurPhoto via Getty Images Related Share this article Efforts to slow the Covid-19 pandemic early last year by restricting travel and various forms of commerce pushed greenhouse gas emissions down, at least for a few months. But that didn’t slow global warming, as 2020 tied with 2016 as Earth’s warmest year on record and atmospheric greenhouse gases reached a new high.

United statesAndrew gettelmanMichael mannFranziska glassmeierPriestley centreGeophysical research lettersNational centerUniversity of colorado boulderInstitute for researchAtmospheric researchProceedings of the national academy sciencesUniversity of leedsGeophysical researchPenn stateComplex dancePiers forster

COVID Lock-Downs Responsible for Global Warming

COVID Lock-Downs Responsible for Global Warming
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United statesAndrew gettelmanGeophysical research lettersAtmospheric researchNational centerNational science foundationCommunity earth system modelSouthern hemisphereஒன்றுபட்டது மாநிலங்களில்புவி இயற்பியல் ஆராய்ச்சி எழுத்துக்கள்வளிமண்டலம் ஆராய்ச்சிதேசிய மையம்தேசிய அறிவியல் அடித்தளம்சமூக பூமி அமைப்பு மாதிரிதெற்கு அரைக்கோளம்

Weekly Meanderings 6 February 2021

Our weekly selection of links across the web. Scot McKnight Good morning! CHICAGO (NewsNation Now) A music student is reunited with his beloved and valuable flute after leaving it on a Chicago train. Donald Rabin says his flute is an extension of him. Worth $22,000, his grandmother left him the money to buy the gold and silver flute when she passed away in 2016. “When she left that in her will I always brought her with me no matter where I went,” Rabin said. Rabin was riding a Blue Line train from O’Hare International Airport on Jan. 29, during a layover before his return to the Berklee College of Music in Boston.

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Counterintuitive : The planet warmed as virus reduced CO2 - Governors Wind Energy Coalition

Counterintuitive : The planet warmed as virus reduced CO2 - Governors Wind Energy Coalition
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Andrew gettelmanGeophysical research lettersUs national centerAtmospheric researchபுவி இயற்பியல் ஆராய்ச்சி எழுத்துக்கள்எங்களுக்கு தேசிய மையம்வளிமண்டலம் ஆராய்ச்சி