Green Car Congress

NOVEMBER 7, 2017

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

Ozone Insight Netherlands North America 150

Green Car Congress

FEBRUARY 6, 2018

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

Ozone Global North America Colorado 255

Green Car Congress

NOVEMBER 9, 2016

They found that the increase in ozone burden due to the spatial distribution change slightly exceeds the combined influences of the increased emission magnitude and global methane. Based on their findings, they suggested that emission increases in Southeast, East and South Asia may be most important for the ozone change.

Ozone 230

Ozone Pollution Global North Carolina 230

Green Car Congress

JANUARY 16, 2012

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). —Welz et al.

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Ozone Climate Change Climate 2012 268

Green Car Congress

APRIL 12, 2013

The new measurements will provide further insight into hydrocarbon combustion and atmospheric chemistry. For unsaturated hydrocarbons—molecules with at least one C=C double bond—a prominent removal mechanism is reaction with ozone, called ozonolysis. Earlier post.).

Water 218

Water Universal Ozone Insight 218

Green Car Congress

OCTOBER 11, 2012

Researchers from the University of Minnesota have produced a spatially and temporally explicit life cycle inventory (LCI) of air pollutants from gasoline, ethanol derived from corn grain, and ethanol from corn stover for the contiguous US (the lower 48 states). Dashed lines show US average emissions. Credit: ACS, Tessum et al.

Gasoline 236

Gasoline Emissions Gasoline-Electric Pollution 236

Green Car Congress

AUGUST 9, 2009

Isoprene, a five-carbon diene formed naturally in plants and animals and a precursor of ozone, contributes more than 40% of these emissions. The discovery of these highly soluble epoxides, the authors wrote in their paper, provides a missing link tying the gas-phase degradation of isoprene to the observed formation of organic aerosols.

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Climate New Zealand Denmark 2009 150