2d ) increase in the mid-latitude stratosphere, and the EP flux convergence has an increasing trend in the mid-latitude troposphere and in the mid- and high-latitude lower stratosphere.
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Recent strengthening of the stratospheric Arctic vortex response to warming in the central North Pacific.
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The sentences
From a linear point of views, if a warming trend in the CNP was 1.0 K decade –1 , it would result in a decreasing trend of –60.84 gpm decade –1 in PCH.