NSIDC

Some interesting goings-on in the cryosphere these days. In this chart (click the link for an interactive, larger resolution version) from the cryosphere today we can see that we are on the 45th day in a row of daily record lows in sea ice area. Note that this is area which is different from extent.  Area refers to the actual ice cover, I am not sure of the details of how that is defined in practice, whereas extent refers to any ocean surface that contains 15% or more ice cover.  Again, there will be technical details I am not familiar with for determining the edges of extent (e.g. grid size…