Volcanic eruptions in the tropics can lead to a stronger polar vortex during winter for as long as two years afterwards. The strength and position of the polar vortex shapes the flow pattern in a broad area about it. An index which is used in the northern hemisphere to gauge its magnitude is the Arctic oscillation.= = = Geisha = = =
v ɑ l k æ n ɪ k WORD_BOUNDARY ɪ ɹ ʌ p ʃ ə n z WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY t ɹ ɑ p ɪ k s WORD_BOUNDARY k æ n WORD_BOUNDARY l iː d WORD_BOUNDARY t ʊ WORD_BOUNDARY ʌ WORD_BOUNDARY s t ɹ ɔ ŋ ɡ ə ɹ WORD_BOUNDARY p oʊ l ə ɹ WORD_BOUNDARY v ɔ ɹ t ɛ k s WORD_BOUNDARY d ʊ ɹ ɹ ɪ ŋ WORD_BOUNDARY w ɪ n t ə ɹ WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY æ z WORD_BOUNDARY l ɔ ŋ WORD_BOUNDARY æ z WORD_BOUNDARY t uː WORD_BOUNDARY j ɪ ɹ z WORD_BOUNDARY æ f t ə ɹ w ə ɹ d z WORD_BOUNDARY ð ə WORD_BOUNDARY s t ɹ ɛ ŋ θ WORD_BOUNDARY æ n d WORD_BOUNDARY p ə z ɪ ʃ ə n WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY p oʊ l ə ɹ WORD_BOUNDARY v ɔ ɹ t ɛ k s WORD_BOUNDARY ʃ eɪ p s WORD_BOUNDARY ð ə WORD_BOUNDARY f l oʊ WORD_BOUNDARY p æ t ə ɹ n WORD_BOUNDARY ɪ n WORD_BOUNDARY ʌ WORD_BOUNDARY b ɹ ɔ d WORD_BOUNDARY ɛ ɹ iə WORD_BOUNDARY ʌ b aʊ t WORD_BOUNDARY ɪ t WORD_BOUNDARY ʌ n WORD_BOUNDARY ɪ n d ɛ k s WORD_BOUNDARY w ɪ t̠ʃ WORD_BOUNDARY ɪ z WORD_BOUNDARY j uː z d WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY n ɔ ɹ ð ə ɹ n WORD_BOUNDARY h ɛ m ɪ s f ɪ ɹ WORD_BOUNDARY t ə WORD_BOUNDARY ɡ eɪ d̠ʒ WORD_BOUNDARY ɪ t s WORD_BOUNDARY m æ ɡ n ɪ t uː d WORD_BOUNDARY ɪ z WORD_BOUNDARY ð ɪ WORD_BOUNDARY ɑ ɹ k t ɪ k WORD_BOUNDARY ɑ s ɪ l eɪ ʃ ə n WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY d̠ʒ eɪ ʃ ə WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY