The relationship between the NAO and the winter precipitation in Yunnan province is much close during the warm phase of ENSO, while, they are barely linked during the cold phase of ENSO.

当ENSO为暖位相时，NAO和云南省冬季降水关系更为紧密，而当ENSO为冷位相时，NAO和云南省冬季降水的联系则不太显著。

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We are currently in a not-so-cold phase of an ice age - The Quaternary Ice Age.

BBC: Looking for the greenhouse signal

This pole-centred roundel of warm-in-cold is symptomatic of what climatologists call the negative phase of the Arctic oscillation (AO).

ECONOMIST: Britain��s cold snap is explained by the Arctic oscillation

The Little Devil chassis used for the purpose of this demo has an LED screen displaying the -40-degree operating temperature, but you won't need it: the system automatically shuts down if it gets too cold, and it won't boot into Windows until Phase Change is up and running.

ENGADGET: A closer look at Origin PC's Phase Change cooling system (and its new gaming laptops too)