Subarashii Sekai Ryokou: Alaska no Tabi "Daigo Hyougaki"

In the near future, Earth is engulfed in a new ice age as snow falls ceaselessly in summer and glaciers advance with uncharacteristic speed. In this SF spinoff of the live-action Wonderful World Travel series, humanity must decide whether to use science to fight the ice or to adapt to it.

(Source: Anime Encyclopedia)