[Reuters] Il semble que ce que les environnementalistes craignent le plus, c’est à dire l’emballement du climat soit en train de commencer. En effet la vitesse de fonte des glaces du cercle artique a, cette été, explosée. Nous sommes à 20% de moins de glace qu’en 2005…
OSLO (Reuters) – A record melt of Arctic summer sea ice this month may be a sign that global warming is reaching a critical trigger point that could accelerate the northern thaw, some scientists say.
« The reason so much (of the Arctic ice) went suddenly is that it is hitting a tipping point that we have been warning about for the past few years, » James Hansen, director of NASA’s Goddard Institute for Space Studies, told Reuters.
The Arctic summer sea ice shrank by more than 20 percent below the previous 2005 record low in mid-September to 4.13 million sq km (1.6 million sq miles), according to a 30-year satellite record. It has now frozen out to 4.2 million sq km.
« I’d say we are reaching a tipping point or are past it for the ice. This is a strong indication that there is an amplifying mechanism here, » said Paal Prestrud of the Center for International Climate and Environmental Research in Oslo.