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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. Trends in daily maximum ozone levels (known as 4MDA8) at urban and non-urban sites.

Ozone 255
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US and UK researchers report direct measurement of key atmospheric reactant; more rapid formation of secondary aerosols

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Now, researchers from Sandia National Laboratory’s Combustion Research Facility, the University of Manchester and the University of Bristol report in a paper in Science the first direct kinetics measurements made of reactions of any gas-phase Criegee intermediate, in this case formaldehyde oxide (CH 2 OO). Carl Percival. —Welz et al.

Ozone 268
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NASA GISS Study Finds That Methane Has an Elevated Warming Effect Due to Interactions With Aerosols

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New research by a team at the NASA Goddard Institute for Space Studies (GISS) in New York suggests that gas-aerosol interactions can amplify the global warming impact of some greenhouse gases. Source: Shindell at al. Click to enlarge. Shindell et al.

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Researchers describe the “where” and “when” of life cycle emissions from gasoline and ethanol in the US

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Life cycle inventories have typically been presented at global, national, or regional levels—sufficient for understanding global processes such as climate change and fossil fuel depletion, but insufficient for the analysis of local processes such as air pollution, according to the researchers. the contiguous US).

Gasoline 236
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Researchers Determine Process Through Which Hydrocarbon Compounds Emitted by Trees Form Aerosols, With Impact on Human Health and Climate

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Aerosols impact human health, due to their ability to penetrate deep into lungs, and impact Earth’s climate through the scattering and absorption of solar radiation and through serving as the nuclei on which clouds form, noted co-author Prof. The latest finding can support the development of better models of global gas-aerosol chemistry.

Climate 150
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Berkeley study identifies diesel as main source of vehicular secondary organic aerosols

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Organic aerosol (OA) in the atmosphere is detrimental to human health and represents a highly uncertain forcing of climate change. The use of petroleum-derived fuels is an important source of reactive gas-phase organic carbon that provides key precursors to the formation of secondary OA (SOA) and tropospheric ozone.

Diesel 281