SAM CARANA. Sam Carana (very likely the moniker for collection of climate scientists and/or science-informed activists) (2015): “ Sediments underneath the Arctic Ocean hold vast amounts of methane. Just one part of the Arctic Ocean alone, the East Siberian Arctic Shelf (ESAS, rectangle on map below, from the methane page), holds up to 1700 Gt of methane. A sudden release of just 3% of this amount could add over 50 Gt of methane to the atmosphere, and experts consider such an amount to be ready for release at any time “ (Sam Carana, “Strong winds and high waves hit Arctic Ocean”, Arctic News, 8 December 2015: http://arctic-news.blogspot.com.au/ ).
[Editor’s note: The Global Warming Potential (GWP) of CH4 on a 20 year time frame and with aerosol impacts considered is 105 times that of CO2 [Drew T. Shindell , Greg Faluvegi, Dorothy M. Koch , Gavin A. Schmidt , Nadine Unger and Susanne E. Bauer , “Improved Attribution of Climate Forcing to Emissions”, Science, 30 October 2009: Vol. 326 no. 5953 pp. 716-718: http://www.sciencemag.org/content/326/5953/716 and Shindell et al (2009), Fig.2: http://www.sciencemag.org/content/326/5953/716.figures-only ). The German WBGU (2009) and the Australian Climate Commission (2013) have estimated that no more than 600 billion tonnes of CO2 can be emitted between 2010 and zero emissions in 2050 if the world is to have a 75% chance of avoiding a catastrophic 2C temperature rise (WBGU, “Solving the climate dilemma: the budget approach”: http://www.ecoequity.org/2009/10/solving-the-climate-dilemma-the-budget-approach/ and Australian Climate Commission, “The critical decade 2013: a summary of climate change science, risks and responses”, 2013, p7: http://climatecommission.gov.au/wp-content/uploads/The-Critical-Decade-2013-Summary_lowres.pdf ).. The 50 Gt (billion tonnes) CH4 in the East Siberian Arctic Shelf is thus equivalent to 50 billion tonnes CH4 x 105 tonnes CO2-equivalent/tonne CH4 = 5,250 tonnes CO2-e or about nine (9) times more than the world’s terminal greenhouse gas (GHG) pollution budget. And as for 1700 Gt CH4 ... We are utterly doomed unless we can stop this Arctic CH4 release.]