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Study: 2/3 of aviation climate impact due to emissions other than CO2

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Net positive RF (warming) contributions arise from CO 2 , water vapor, NO x , and soot emissions, and from contrail cirrus (consisting of linear contrails and the cirrus cloudiness arising from them). These contributions involve a large number of chemical, microphysical, transport and, radiative processes in the global atmosphere.

Climate 448
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California 2017 GHG inventory shows 1.2% total drop from 2016; transportation sector emissions up 1%

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Changes in emissions by Scoping Plan sector between 2000 and 2017. Transportation sector emission sources include combustion of fuels utilized in-state that are used by on-road and off-road vehicles, aviation, rail, and water-borne vehicles, as well as a few other smaller sources. Compared to 2016, California’s GDP grew 3.6%

2017 230
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Cutting Non-CO2 Pollutants Can Delay Abrupt Climate Change; The Fast Action Climate Agenda

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HFCs are powerful greenhouse gases originally developed as substitutes for ozone-depleting chemicals. By 2050, HFC emissions could equal up to 19% of global CO 2 emissions under business-as-usual scenarios. From Molina et al. 2009), reproduced from Ramanathan and Feng (2008) Click to enlarge. Earlier post.) Mario Molina. (Dr.

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UN Review of Recent Climate Research Concludes That Impacts Of Climate Change Coming Faster Than Anticipated

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Losses of tropical and temperate mountain glaciers affecting perhaps 20-25% of the human population in terms of drinking water, irrigation and hydro-power. Global emissions were growing by 1.1% per year from 2000-2007. each year from 1990-1999 and this accelerated to 3.5%

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UNEP Report Calls for More Sophisticated Approach to Developing Biofuels; Limitations of Current LCA Studies

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Here, RME show advantages for primary energy and GHG, but disadvantages in terms of acidification, eutrophication and ozone depletion. There is an obvious link between environmental impacts estimated by life-cycle impact assessments and water quality problems described at the regional scale. Source: “Assessing Biofuels”.

Ozone 186