Pak-ke̍k chín-tōng

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Pak-ke̍k chín-tōng

Pak-ke̍k chín-tōng (北極振動; Arctic oscillation, AO) he̍k-chiá pak-ke̍k chìn-tōng (北極震盪) sī Pak-ke̍k ê khì-ap kap pak-poàn-kiû tiong-hūi-tō͘ só͘-chāi ê khì-ap chhut-hiān tian-tò piàn-tōng ê hiān-siōng.