People are overthinking and over-analyzing Arctic Ice extents, and getting wrapped around the axle (or should I say axis). So let’s keep it simple and we can all readily understand what is happening up North.
I will use the ever popular NOAA dataset derived from satellite passive microwave sensors. It sometimes understates the ice extents, but everyone refers to it and it is complete from 1979 to 2017. Here’s what NOAA reports (in M km2):
If I were adding this to the Ice House of Mirrors, the name would be The X-Ray Ice Mirror, because it looks into the structure of the time series. For even more clarity and simplicity, here is the table:
NOAA NH Annual Average Ice Extents (in M km2). Sea Ice Index v2.1 (here)
| Year | Average | Change | Rate of Change |
| 1979 | 12.328 | ||
| 1994 | 12.011 | -0.317 | 0.021 per year |
| 2007 | 10.474 | -1.537 | 0.118 per year |
| 2017 | 10.393 |
View original post 254 more words
Climate Collections 