White House warned on Arctic ice loss

By Dr Nafeez Ahmed / via Guardian. National security officials worried by rapid loss of Arctic summer sea ice overlook threat of permanent global food shortages. Senior US government officials are to be briefed at the White House this week on the danger of an ice-free Arctic in the summer within two years. The meeting is bringing together Nasa’s acting chief scientist, Gale…

Runaway Climate – Extreme Greenhouse Effect

Runaway climate change Wikipedia: Runaway climate change describes a scenario in which the climate system passes a threshold or tipping point, after which internal positive feedback effects cause the climate to continue changing, even absent further external forcings. The runaway climate change continues until the feedback effects run out, possibly at a new climate state. The phrase “runaway climate change” is used to describe…