Comparison of Arctic Sea Ice Thickness for 2014-2021 with Margo (July 14, 2021) Comparison of Arctic Sea Ice Thickness for 2014-2021 with Margo (July 14, 2021) July 14, 2021 admin Comments 0 Comment Margo and I discovered some time back that you cannot compare the the US Navy’s ice thickness data from 2012 and now because they changed their model. Here is Margo’s latest report Methane, Sea Ice & Climate Roundup with Margo (July 11, 2021)