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35 Current news about the topic atmospheric chemistry

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Lightning and subvisible discharges produce molecules that clean the atmosphere

04-May-2021

Lightning bolts break apart nitrogen and oxygen molecules in the atmosphere and create reactive chemicals that affect greenhouse gases. Now, a team of atmospheric chemists and lightning scientists have found that lightning bolts and, surprisingly, subvisible discharges that cannot be seen by ...

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Particulates are more dangerous than previously thought

Harmful substances are already formed in the atmosphere, not just in the human body

24-Mar-2021

Researchers at the Paul Scherrer Institute PSI have for the first time observed photochemical processes inside the smallest particles in the air. In doing so, they discovered that additional oxygen radicals that can be harmful to human health are formed in these aerosols under everyday ...

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Oxidation processes in combustion engines and in the atmosphere take the same routes

25-Feb-2021

Alkanes, an important component of fuels for combustion engines and an important class of urban trace gases, react via another reaction pathways than previously thought. These hydrocarbons, formerly called paraffins, thus produce large amounts of highly oxygenated compounds that can contribute to ...

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Surprise from the jungle soil

Soil microorganisms in the Amazon rainforest can affect atmospheric chemistry

01-Aug-2018

The Amazon rainforest is the largest forest on earth. Its trees emit huge amounts of volatile substances that influence the chemical composition of the air. Some of these substances are the so-called sesquiterpenes, very reactive chemicals that can rapidly consume ozone. Until recently scientists ...

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Rapid pair production: Detection of a new reaction path in the atmosphere

04-Apr-2018

Scientists have now observed a particularly rapid type of pair production in the laboratory: Hydrocarbons double when two peroxyl radicals react with each other. This means that stable products with the carbon skeleton of both peroxyl radicals are formed, which very likely will have a peroxide ...

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Reducing manure and fertilizers decreases atmospheric fine particles

A decrease of agricultural ammonia emissions avoids mortality attributable to air pollution

01-Nov-2017

Fine particulates have numerous sources – not only traffic, which is currently under particular scrutiny. Reducing agricultural emissions could also considerably reduce the particulate levels that are hazardous to health, concludes a study by researchers at the Max Planck Institute for Chemistry ...

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New method for identifying carbon compounds derived from fossil fuels

15-Sep-2017

Scientists at the National Institute of Standards and Technology (NIST) have developed a laboratory instrument that can measure how much of the carbon in many carbon-containing materials was derived from fossil fuels. This will open the way for new methods in the biofuels and bioplastics ...

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A hybrid material to spot organic contaminants in the atmosphere

31-Jul-2017

The development of hybrid materials is an emerging field in materials science. As the researcher explained, the interest in these materials stems from "the success in combining that stability of inorganic components with the versatility of organic components. Blending them causes the properties ...

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Tiny particles increase in air with ethanol-to-gasoline switch

18-Jul-2017

The concentration of ultrafine particles less than 50 nanometers in diameter rose by one-third in the air of São Paulo, Brazil, when higher ethanol prices induced drivers to switch from ethanol to gasoline, according to a new study by a Northwestern University chemist, a National University of ...

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Ozone recovery may be delayed by unregulated chemicals

29-Jun-2017

Recent increases in an unregulated ozone-depleting substance, could delay recovery of Antarctic ozone levels by 5-30 years, depending on emissions scenarios. The findings suggest that a previously ignored chemical called dichloromethane may now be contributing to ozone depletion and should be ...

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