南なん極きょく気き団だん

noun

Antarctic air mass

Technical term in meteorology referring to a large body of air originating over Antarctica, characterized by very cold and dry properties.

• 南なん極きょく気き団だんが北ほく上じょうすると、南みなみ半はん球きゅうの気き温おんが急きゅう激げきに下さがることがある。

  When an Antarctic air mass moves northward, temperatures in the Southern Hemisphere can drop sharply.