Arctic Sea Ice Extent, Area, and Volume

[WolfStock1]

10 minutes ago, TheClimateChanger said:

Current State of Sea Ice Cover | Earth

 

OK thanks.

I see the description of the two: "Sea ice extent is the integral sum of the areas of all grid cells with at least 15% ice concentration, while sea ice area is the integral sum of the product of ice concentration and area of all grid cells with at least 15% ice concentration."

I *think* I get the distinction but not sure.   Is it the case that "extent" include 100% of every grid cell, for cells with > 15% concentration; whereas "area" includes only the area of ice itself within all those cells?

(thus why extent is larger than area)

(I had been using the NSIDC page which only shows extent - https://nsidc.org/sea-ice-today/sea-ice-tools/charctic-interactive-sea-ice-graph)