Graphs which plot 15+% concentration ice show Arctic ice extent dropping precipitously, while 30+% concentration ice and ice area aren’t dropping at all.
30% ice is flat, and just below 2006.
The reason this is happening, is because the low concentration ice is compacting. This reduces its extent, but doesn’t affect the area, and actually increases the extent of higher concentration ice. Bottom line is that the ice isn’t melting much, and hasn’t been for about a week.
The colored maps I generate use approximately 30% concentration ice, because it is a better indication of ice melt/freeze than the 15% graphs used by NSIDC and others.