Arctic sea ice extent meltdown has come 50% of the way from Winter Maximum to a Blue Ocean Event per July 13th. The lowest extent year ever, 2016, for comparison, was at 48%.
At 50% for sea ice volume meltdown, 2019 was 1 day behind 2012, down from 3 days behind at 25%. Currently, 2019 looks set to reach 75% within July, which would be a first in the satellite record.
At half–time for the year 2019, decadal averages for the 2010s H1 could be calculated. For the first 6 months of the year, the 2010s on average were at 19,861 km³. That’s down from 23,539 km³ for the 2000s, which amounts to a 15.6% drop per decade. (The 2nd half of the year has a much larger drop, but we’ll get to that when the data is in.)
The 2010s Q2 Average was 20,353 km³, down from 24,372 km³ for the 2000s, which means a 16.5% drop per decade. The 2010s Q1 Average was 19,364 km³, down from 22,697 km³ for the 2000s, which amounts to a 14.7% drop per decade. Please note how all of these decadal loss percentages are larger than the BS NASA drop rate of 12.8%, which is published for political purposes, and please also note that the drop rate will increase for Q3 & Q4 of the 2010s decade, as Q1 & Q2 have the smallest drop of the year. Also expect the full year decadal drop rate for the 2010s from the 2000s to be larger than 16.5% (Q2 drop rate), and of course way larger than the Wishful Thinking 12.8% drop rate from NASA.
And if you happen to be an Abrupt Climate Change Denier, send your thanks to NASA, as that’s your tax money at work, if you’re a citizen of the USA. As long as they lie to you every day, you don’t have to worry about a thing.