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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 Finds On-Road Transportation Sector the Greatest Net Contributor to Atmospheric Warming Now and in Mid-Term; Power Sector Takes the Lead by 2050

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Radiative forcing due to perpetual constant year 2000 emissions grouped by sector for 2020 (left) and 2100 (right) showing the contribution from each species. The net sum of total radiative forcing is indicated by the title of each bar. From Unger et al., Click to enlarge. Unger et al. —Unger et al. A hat-tip to Tom!).

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Study projects net cooling of climate from ship emissions through 2050

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In addition to CO 2 , other compounds such as ozone (O 3 ) precursors (nitrogen oxides (NO x =NO+NO 2 ), carbon monoxide (CO), and volatile organic compounds (VOCs)) and aerosols such as black carbon (BC) and organic carbon (OC) are emitted by ships. 1 from shipping in 2007, corresponding to 3.3% 1 of the total ship emissions in 2007.

Climate 240
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Study finds paved surfaces in Houston worsen air quality

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Houston, with a mix of petrochemical facilities, sprawling suburbs, and traffic jams that stretch for miles, has some of the highest levels of ground-level ozone and other air pollutants in the United States. The article is in press in the Journal of Geophysical Research-Atmospheres , a publication of the American Geophysical Union.

Houston 247
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Critical review finds actual measurement data on segments of natural gas lifecycle sparse or lacking

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Between 2000 and 2011, the number of producing gas wells in the US increased by 50%, reaching 514,637. Air emissions from the natural gas life cycle include greenhouse gases, ozone precursors (volatile organic compounds and nitrogen oxides), air toxics, and particulates. jobs vs environmental stewardship). —Moore et al.

Gas 218
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Researchers suggest that air quality tests need simplifying to help reduce dangerous emissions

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Lead author Professor William Stockwell from the University of Texas at El Paso explains that accurate simulations of air pollutants require updated and accurate descriptions of the chemical processes for the changing chemical regimes of the atmosphere and emerging contaminants of concern.

Emissions 170
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Researchers Engineer Yeast to Produce Methyl Halides from Biomass; Precursors for Biohydrocarbon Fuels

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Researchers at the University of California San Francisco have engineered the industrial yeast S. Cicerone (2000) Emissions of Methyl Halides and Methane from Rice Paddies. fermentans ferments cellulosic feedstocks to acetate and ethanol, which the modified S. cerevisiae uses to produce methyl halides. Adapted from Bayer et al.

Engine 150