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Study: traffic density, wind and air stratification influence concentrations of NO2

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In connection with the effects of the COVID-19 pandemic, satellite measurements made headlines showing how much the air pollutant nitrogen dioxide (NO 2 ) had decreased in China and northern Italy. The statistical analysis has also enabled the researchers to remove the influence of the weather from the time series of pollutant concentrations.

Wind 186
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Opinion: Reinventing fuel-based power for a more secure and resilient grid

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It is, however, a challenge that is being made all the greater as we continue to decentralize power generation with more distributed, variable and inflexible sources, such as wind and solar. Increasingly, wind and solar are replacing fossil fuels as our principle source of energy. 100% wind and solar is not feasible on its own.

Grid 332
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The Long View from SAE 2009 World Congress

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On 20 April, the opening day of the SAE 2009 World Congress, the AVL Technology Leadership Theater presented a forum on “Green Mobility—The Long View”. Prof Cervero acknowledges “ that it is easier to get the pollution, rather than the people, out of the car ” and is a big supporter of car sharing. by Bill Cooke. 27.5 / 22.2.

2009 150
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Study Finds Asian Monsoon Carries Pollution Into the Stratosphere

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Arrows denote winds at this level derived from meteorological analysis, showing that the HCN maximum is linked with the upper tropospheric Asian monsoon anticyclone. The finding, published online 25 March in the journal Science , provides additional evidence of the global nature of air pollution and its effects far above Earth’s surface.

Pollution 246
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Study illustrates impact of ship emissions on Shanghai air quality

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The aerosol time-of-flight mass spectrometer (ATOFMS) measurements were carried out at an urban site from April 2009 to January 2013. This may have caused substantial atmospheric pollution and worsened the current air-pollution situation in megacity Shanghai. When wind speed is less than 0.5 Credit: ACS, Liu et al.

Emissions 150
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NOAA and EPA Study Finds Highway Barriers May Reduce Pollutants as Well as Block Sound and Sight of Traffic

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Highway barriers erected along roadways to block the sound and sight of traffic for the adjoining neighborhoods may also be reducing the amount of pollutants, such as soot from diesel exhaust, reaching area residents, according to a study by NOAA and the US Environmental Protection Agency (EPA). Dennis Finn. Dennis Finn, Kirk L. 2009.10.012.

Pollution 170
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IRENA report finds renewable power costs at parity or below fossil fuels in many parts of world

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The report, “ Renewable Power Generation Costs in 2014 ”, concludes that biomass, hydropower, geothermal and onshore wind are all competitive with or cheaper than coal, oil and gas-fired power stations, even without financial support and despite falling oil prices. Report highlights include: Cape Wind’s troubles. Click to enlarge.

Renewable 150