The first is the three holes that have suddenly appeared in the Siberian tundra and are reportedly caused by a methane explosion. There have always been worries about the possibility of a warming climate melting the permafrost and releasing methane from the frozen soil. This soil really consists of massive amounts of organic matter, grass and wood which is half rotted and held in suspension by the extreme cold. If the ice melts the organic matter rots and huge quantities of methane are released. As methane is a greenhouse gas that is 72 times as powerful as CO2 over a twenty year period this has the potential to change the world’s climate very rapidly.
Two swallows do not make a summer but these incidents highlight the type of problem that a warming world can bring.