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WHO issues new, lower Global Air Quality Guidelines for classical pollutants

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New WHO has issued new Global Air Quality Guidelines (AQGs) that reduce levels of key air pollutants, some of which also contribute to climate change. Since WHO’s last 2005 global update, there has been a marked increase of evidence that shows how air pollution affects different aspects of health. WHO global air quality guidelines.

Pollution 435
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Satellite method provides insight into ozone-NOx-VOCs sensitivity for different locations

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Ozone pollution near Earth’s surface is one of the main ingredients of summertime smog. It is also not directly measurable from space due to the abundance of ozone higher in the atmosphere, which obscures measurements of surface ozone. —Jin et al.

Ozone 150
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Toyota develops tropospheric ozone-concentration simulator for South and East Asia

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have developed a simulator able to predict tropospheric ozone concentrations across the whole of South and East Asia. Tropospheric ozone is the main cause of photochemical smog, an atmospheric pollutant harmful to human health and plant growth. Toyota Motor Corporation (TMC) and Toyota Central R&D Labs.,

Ozone 199
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WMO reports GHG concentrations at highest in 800K years

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Globally averaged concentrations of CO 2 reached 403.3 Globally averaged concentrations for CO 2 reached 403.3 It also plays an important role in the destruction of the stratospheric ozone layer which protects us from the harmful ultraviolet rays of the sun. parts per million in 2016, up from 400.00 ppm in 2015.

2016 186
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HALO research aircraft measuring the emissions of megacities in EmeRGe project

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The University of Bremen is the scientific base of the international project known as EMeRGe (Effect of Megacities on the transport and transformation of pollutants on the Regional and Global scales). DLR will provide information about the location of the flights conducted via its social media channels. —Joohn Burrows.

Emissions 268
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Test of Planet-Cooling Scheme Could Start in 2022

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Up there, 10 to 50 kilometers above the Earth’s surface, ozone molecules absorb the sun’s ultraviolet light, protecting life far below. Even less is understood about the potential risks to people and the environment—could the particles deplete the ozone layer, for example, or significantly alter the weather?

Ozone 121
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DISCOVER-AQ project to begin flights to enhance measurement of ground-level air-quality from space

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The project—Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality ( DISCOVER-AQ )—will help researchers develop a three-dimensional view of how air pollutants are distributed and move between different levels of the atmosphere throughout the day.

Ozone 186