Wherein we can see the complete Ice Cap melt of a 1.5C Earth here in outline. The hypothesized complete decadal Arctic melt, will increase to an annual summer melt if the ambient global temperature of Earth reaches 2.0C above pre-industrial levels, according to the IPCC 2018 Report.
Figure 1. Arctic sea ice extent in July tracked at record low levels for multiple individual days and for the month as a whole. During the second half of the month, Europe experienced another record-breaking heat wave. By the end of the month, the European heat wave enhancing melt over the Greenland ice sheet. Look due north of the Alaska-Canada border above Northwest Territories (right). There is a warm water-hole in the ice cap similar to the one that existed above Siberia at the end of July and presaged the break-up of sea-ice there. (remember the “crab claw”?)
Figure 2. Arctic sea ice extent for August 26, 2012 (right) was 4.10 million square kilometers (1.58 million square miles), which was 70,000 square kilometers (27,000 square miles) below the September 18, 2007 daily extent of 4.17 million square kilometers (1.61 million square miles, left). The orange line shows the 1979 to 2000 median extent for that day. The black cross indicates the geographic North Pole.
Figure 3. Rapid ice loss for July 2019 was in part driven by warm conditions during the first half of the month. By July 30, the heat wave that had been plaguing Europe baked Greenland with temperatures at the 925 hPa/ 10C (18F) above average while parts of the Arctic Ocean saw temperatures 1-7C (2-13) above average. About 60 percent of the Greenland ice sheet experienced melt.