極きょく渦うず

noun

polar vortex; polar cell

Meteorological term for a large-scale cyclone near the poles. 極渦 usually refers to the polar vortex, while 極細胞 (polar cell) is a related but distinct concept; the source groups them together.

• 極きょく渦うずが南なん下かすると、寒かん波ぱがやってくる。

  When the polar vortex moves south, a cold wave arrives.

• 成せい層そう圏けんの極きょく渦うずは冬ふゆに強つよまる。

  The stratospheric polar vortex strengthens in winter.