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

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of the human-made climate impact; two-thirds of this impact are caused by emissions other than CO 2 , according to a new study by researchers in Europe and the US. Schematic overview of the processes by which aviation emissions and increased cirrus cloudiness affect the climate system. Aviation accounts for 3.5% —Lee et al.

Climate 448
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Garnaut Climate Change Review issues first of 8 update papers in 2011; reaffirms decision-making framework and need for mitigation efforts

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As commissioned by the Australian Government in 2010, the Garnaut Climate Change Review, led by Professor Ross Garnaut, has issued the first of a series of papers scheduled for this month and next updating the 2008 Climate Change Review. A Final Update Report will be presented to Australia’s Prime Minister on 31 May 2011.

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Summary of decisions from Durban climate conference

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Governments at the COP17 meeting decided to adopt some form of a universal legal agreement on climate change as soon. markets all remain in action as effective tools to leverage global climate action and as models to inform. Nations Framework Convention on Climate Change (UNFCCC). Green Climate Fund. future agreements.

Climate 294
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EPA annual US GHG inventory shows 1.6% drop in 2011 from previous year; transportation CO2 down 1.1%

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Total US greenhouse gas emissions by economic sector in 2011. decrease in 2011 from the previous year. GHG emissions in 2011 showed a 6.9% Total emissions of the six main greenhouse gases in 2011 were equivalent to 6,702 million metric tons of carbon dioxide. million metric tons in 2011. billion gallons in 2011.

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EPA says methane emissions from natural gas production have dropped 36% from 2007-2011

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In its recently released Inventory of US Greenhouse Gas Emissions and Sinks: 1990 – 2011 ( earlier post ), the US Environmental Protection Agency (EPA) reported that methane (CH 4 ) emissions from the field production of natural gas have declined by 36% from 2007 to 2011 (from 83.1 Tg CO 2 eq) in 2011. Tg CO 2 eq (25%).

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A third effect of anthropogenic aerosols on the climate

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In a paper published in the journal Science , Natalie Mahowald at Cornell University reports on a third effect of anthropogenic aerosols on the climate—their slow impact on biogeochemical cycles potentially affecting the fluxes of CO 2 into and out of the atmosphere. —Mahowald 2011. Science Vol. 1207374.

Climate 261
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Study Concludes Peak Coal Will Occur Close to 2011

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A multi-Hubbert analysis of coal production by Tadeusz Patzek at The University of Texas at Austin and Gregory Croft at the University of California, Berkeley concludes that the global peak of coal production from existing coalfields will occur close to the year 2011. Gt C (15 Gt CO 2 ) per year, according to the study.

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