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International study identifies 14 key measures to reduce methane and black carbon emissions; reduction in projected global mean warming of ~0.5 °C by 2050

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A study by an international team of researchers, led by Drew Shindell of NASA’s Goddard Institute for Space Studies (GISS) in New York City, has identified 14 measures targeting methane and black carbon (BC) emissions that could reduce projected global mean warming ~0.5°C All 14 would curb the release of either black carbon or methane.

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NOAA Arctic Report Card finds Arctic entering into new phase: warmer, greener, and less ice

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An international team of scientists who monitor the rapid changes in the Earth’s northern polar region say that the Arctic is entering a new state, one with warmer air and water temperatures, less summer sea ice and snow cover, and a changed ocean chemistry.

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EPA Issues Proposed Endangerment Finding for Greenhouse Gases; Proposed Cause or Contribute Finding Identifies Motor Vehicles as Contributing Source

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There are two public hearings scheduled for this proposed finding: 18 May at the EPA Potomac Yard Conference Center, Arlington, VA; and 21 May at the Bell Harbor International Conference Center in Seattle, WA. Climate change has the potential to produce increases in ground-level ozone in many regions, according to the report.

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The New Supersonic Boom

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government established a Supersonic Transport Advisory Committee, which began discussions with international partners about building a supersonic airliner. The 1964 Oklahoma City tests involved more than 1,000 flights, which sparked more than 15,000 complaints, as documented in a 1971 report prepared by the National Bureau of Standards.

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

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Ocean acidification caused by the absorption of carbon dioxide in seawater is already increasing along the California coast decades earlier than existing models predict. Key developments documented since the IPCC Fourth Assessment Report include: Earth Systems. Global emissions were growing by 1.1% per year from 2000-2007. Ecosystems.

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Royal Society Report Concludes Geoengineering and its Consequences May be the Price for Failure to Act on Climate Change; Recommendations for Plan B

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Unless emissions of carbon dioxide can be greatly reduced—i.e., The report assesses the two main kinds of geoengineering techniques: Carbon Dioxide Removal (CDR) and Solar Radiation Management (SRM). However, there are some serious questions over adverse effects, particularly depletion of stratospheric ozone.

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Flying first class on a single domestic round trip can contribute more greenhouse gas emissions than a year of driving

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Average greenhouse gas emissions (carbon dioxide equivalent) per passenger from flying were obtained from an online emissions calculator at myclimate (a nonprofit spin-off from the Swiss Federal Institute of Technology). A documentation for the myclimate calculator includes other aspects of the method used.).

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