How extensive will be the reorganization of the planet’s climate system and northern ecosystems in response to an 80% loss in summer arctic sea ice cover over the next few decades?

Arctic sea ice loss is happening at least 30 years earlier than anticipated by the IPCC AR4 Report. The arctic ocean is gaining excess heat which is already being given back to the atmosphere in the autumn and thus changing the winds down into the northern mid-latitudes and the northern part of the earth’s heat engine. We have lost 40 % of summer sea ice already; this impact will only increase as we lose 80 % of the summer sea ice over the next few decades.