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DLR: cleaner aircraft emissions reduce the climate impact of contrail cirrus

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Fewer soot particles in the exhaust stream of aircraft reduces the formation of ice crystals and therefore the climate impact of the resulting contrail cirrus. The results are published in an open-access paper in the Nature Partner Journal (npj) Climate and Atmospheric Science. —Ulrike Burkhardt.

Climate 278
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Black carbon is a much larger cause of climate change than previously assessed; about twice previous estimates, and 2/3 the effect of CO2

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Schematic overview of the primary black-carbon emission sources and the processes that control. the distribution of black carbon in the atmosphere and determine its role in the climate system. Accounting for all of the ways black carbon can affect climate, it is believed to have a warming effect of about 1.1

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Carnegie study finds climate impact of particulates varies greatly depending on where the pollution originated

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However, while greenhouse gases cause warming by trapping heat in the atmosphere, some aerosols can have a cooling effect on the climate because the aerosol particles cause more of the sun’s light to be reflected away from the planet. In many cases, the strongest climate effects of aerosols are felt far from where the aerosols are emitted.

Climate 170
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Reducing Black Carbon Emissions and Ground-Level Ozone Would Provide Immediate Benefit Against Climate Change

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Reducing emissions of black carbon soot and ground-level ozone would quickly make a considerable dent in the climate change problem and would also contribute to public health and protect crop yields, according to an essay in the September/October issue of Foreign Affairs. Besides a danger to breathe, ozone lowers crop yields.

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Government of Canada releases framework for ending fossil fuel subsidies

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Subsidies will be considered inefficient unless they meet one or more of the following six criteria: Enable significant net greenhouse gas emissions reductions in Canada or internationally in alignment with article 6 of the Paris Agreement. Support clean energy, clean technology, or renewable energy. definition of subsidies as a reference.

Canada 150
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3 Oil Majors That Bet Big On Renewables

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BIT:ENI) recently unveiled what has been hailed as the most ambitious climate pledge yet by an oil supermajor. Further, Equinor plans to reduce its net carbon intensity by at least 50% by 2050 by deploying CCUS (Carbon Capture, Utilization, and Storage) and hydrogen technologies. #2 Link to original article: [link].

Oil 418
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Study: IMO low-sulfur fuel standards will decrease childhood asthma cases, premature deaths; climate tradeoffs

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While the health benefits are clear, the research also quantifies tradeoffs in terms of climate. These sulphur containing particles reflect sunlight and help form brighter clouds, creating a global effect—radiative cooling—that temporarily diminishes the warming effects of carbon dioxide. —Sofiev et al.

Standards 170