F. Trinoli, so many thanks for taking the opportunity to respond and to give your perspective!
<Discussion moved here from "The 2017 Melting Season" thread:>
Drawing from my 39-year experience (1978-2017) of hearing experts' sea ice forecasts, so that you perhaps understand my perspective listening to this almost four decades - and also drawing on complaints made to the UN Secretary-general's offices by nations outside the US-UK-EU axis:
that back:
- in 1980's when I was at school, I was taught that climatic warming from GHG was becoming a problem but it would be around year 3,500 (or about a millennium and a half) before the Arctic Ocean becomes "ice free" in summers.
- in February 2007, the Arctic Council's "Arctic Impact" report predicted summer sea ice loss occurring by the year 2150 (then 143 years in future). The Arctic Council also produced sea ice area and extent forecast maps for two periods (2040-2060's and 2070-2100) as enclosed
- in May 2012 Professor Sir John Beddington stated that summer sea ice may survive until the year 2099 or 2100 (for 87 or 88 summer seasons) as stated by HM Government reply to AMEC on 30.05.2012 as enclosed. This was apparently a stretch from the UK Meteorological Office's view of ice being lost by 2070 using creative wording "towards the end of the 21st century"
I see these 'geological time' scale-based optimisms melt time and again. Sadly, I fear to have to see more of them come and go. For me, "job finished" is that for all practical intents and purposes all frozen water of Arctic is gone soon after the blue ocean emerges:
(1) Bøllinger Warming by methane, followed by
(2) exhaustive North GrIS surface melting and
(3) Heindric Ice Berg Armada (= Ice Debris Flows + Slip-Slide Ice Discharges + Hydrofracturing of North Greenland Ice Sheet on land + Rapid Erosion Forces + Perimeter and Continental Slope Failures), producing the job finished:
(4) the Last Dryas as Greenland Ice Sheet land containment failure fills the Atlantic/Arctic Ocean with ice debris. During this final - brief - episode sea ice suddenly spreads out far to the Atlantic,
(4a) so that the Gulf Stream is pushed sideways (towards the Iberian Peninsula) and that
(4b) rapid ice and snow advance results until the ice bergs melt away and only then
(5) resumed warming of ice-free Northern Hemisphere emerges (with high CO2-base-load, unlike the Ice-Ages-of-185-ppm whose warming was driven by seabed and permafrost methane destabilization) as lighter-than-air methane accumulates at stratum well above land (ice) surfaces to leave no mark on ice cores.
I have expressed in geoengineering circles my view that at the point (5) Arctic Geoengineering will become acceptable to the general public to prolong the Last Dryas induced sea ice. Before that Solar Radiation Managment (SRM) is unlikely to get adequate public support for it to be tested, financed and deployed in large scale. My work at Sea Research Society is based on this time horizon. (Yet, I hope things do not go my way and I am totally wrong this time, but many earth systems are showing signs of great stress already). Neither is the past sea ice / ice shelf / land ice destruction time scaling proved anywhere reliable and so UN will see more complaints.
My position is that current "fast-forward" ice melting saga will continue seamlessly from sea to land at the same speed of change, or even greater than that we have seen since optimism of pre-Jim Hansen 1988 testimony era and Rio summit 1992 and all above misguided 'glacial' timescales.
We'll see within 10 years from now, if you are right or me, on post-blue ocean melting job finished on a fast or a slow lane. I exclude minor, thick ice in rugged elevated mountain pockets of Arctic. The totality prospects of absolute ice loss is comprehended my many nations of the world outside US-UK-EU group-think and reflected in the statement by the UN Secretary-general Ban ki-Moon (enclosed).
: F.Tnioli August 10, 2017, 12:09:31 PM
: VeliAlbertKallio August 10, 2017, 12:02:50 AM
"...to finish the job?"
Misconception. I disagree! The job isn't "finished" at that point, but only at its very beginning! The ocean melting advances and its re-freeze delays further. This exposes the ocean to sunlight much closer to the solstice and then staying exposed to that sunlight for longer. I say, this will be the beginning, not the end! This because sun's extra energy from growing insolation will be mopped up by the glaciers, permafrost soils and seabed containing methane. The real drama, 'ko.yaa.nis.katsi', then begins. 
Not misconception on his part. Misunderstanding on yours, rather. He meant the specific job of making Arctic go blue for the 1st time, most probably. Even if he didn't mean exactly that, - what he said _means_ exactly that. While what you described - is a set of "next jobs" in line. The term "job", itself, implies finite amount of work required to complete it; what you described is (practically) not finite, but rather geological thing in terms of its timescale. This topic is practical.