Arctic Emissions of Nitrous Oxide GHG a Dozen Times Worse Than Expected. OOPS.
Surprise... Nitrous oxide emissions from our rapidly warming north are up to 12-times higher than we previously thought, since thawing Arctic permafrost is a huge source. The problem is: 1)the top 3 meters of permafrost contains 73 billion tons of nitrogen; 2)as it thaws microbial action releases bucket loads of N2O; and 3)N2O is a very powerful Greenhouse Gas, with a Global Warming Potential about 300 times that of CO2 (lifetime in atmosphere of 114 years). In this video I chat about what this all means; in the next I show the science in plots and images from the paper.
Abrupt Climate System Risks from Hydrogen Sulphide Ocean Outgassing
Various ocean coastlines, off Africa, Gulf of Mexico, California, and India have periodic emissions of hydrogen sulphide gas. Concentrations less than 1 ppm smell like rotten eggs, while 500 ppm and higher levels are deadly. Warming, stratifying oceans have more anoxic dead zones (lack oxygen, produce methane, H2S), threats to flora and fauna increases. In the “granddaddy of extinctions” 252 million years ago with over 80% death-rates of many species, a so-called Canfield Ocean was the smoking gun. I discuss present-day incidents/locations of H2S emissions, and discuss future risks.