Sea Ice Extent (Global Antarctic and Arctic) – Day 181 – 2021 Published on July 1, 2021 by sunshinehours1 . South / North Like Loading... Related
NASA-NSIDC reports global sea at -1.1 sigma as of 7/1/21. Sunshine hours indicates global sea ice at closer to -2 sigma. Why? Reply
sunshine hours 
NASA-NSIDC reports global sea at -1.1 sigma as of 7/1/21. Sunshine hours indicates global sea ice at closer to -2 sigma. Why?
I use the NOAA data.