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TOAR shows present-day global ozone distribution and trends relevant to health; public database

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Ozone levels across much of North America and Europe dropped significantly between 2000 and 2014. People living in parts of southern Europe, South Korea and southern Japan and China also experienced more than 15 days a year of ozone levels above 70 ppb. Source: University of Leicester. Click to enlarge.

Ozone 255
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Study suggests air pollution may be linked to heightened mouth cancer risk; PM2.5 and ozone

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High levels of air pollutants, especially fine particulate matter (PM 2.5 ) and to a lesser extent, ozone, may be linked to a heightened risk of developing mouth cancer, suggests a study by a team of Taiwanese researchers. The number of new cases, and deaths from, mouth cancer is increasing in many parts of the world.

Ozone 255
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Study: 2/3 of aviation climate impact due to emissions other than CO2

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Eleven years have passed since the last time a similar study was conducted, and there has been a strong growth in the aviation sector since then, particularly in Asia. In the new study, we have analyzed 20 years of aviation emissions, up until and including 2018. —Marianne Tronstad Lund, co-author.

Climate 448
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Study: 87% of world’s population in 2013 lived in areas exceeding WHO PM2.5 guidelines

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increased by 20.4%, driven by trends in South Asia, Southeast Asia, and China, according to the team’s findings. Additionally, the study found that the population-weighted mean concentrations of ozone increased globally by 8.9% An additional 217,000 deaths were attributable to long-term ozone exposure. and ozone (O 3 ).

2013 150
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Fast action on black carbon, ozone and methane could help limit global temperature rise to 2 degrees C

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Fast action on pollutants such as black carbon, ground-level ozone and methane may help limit near term global temperature rise and significantly increase the chances of keeping temperature rise below 2 °C (3.6 °F)—and Perhaps the most intriguing link is between emissions of methane and the formation of tropospheric ozone.

Ozone 218
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HALO research aircraft measuring the emissions of megacities in EmeRGe project

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This scenario is particularly relevant in Asia, home to the world’s largest concentration of megacities. The transport and transformation of plumes from selected European and Asian major population centers (MPCs) will now be investigated with special focus on the rate of formation of ozone and aerosols.

Emissions 268
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Study Finds Asian Monsoon Carries Pollution Into the Stratosphere

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The Asian monsoon circulation provides an effective pathway for pollution from Asia, India, and Indonesia to enter the global stratosphere, according to a new international study led by scientists at the National Center for Atmospheric Research (NCAR) in Boulder, Colo. Source: Randel et al., Click to enlarge.

Pollution 246