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Relationship between the Polar‐Night Jet Oscillation and the Annular Mode
Author(s) -
Kuroda Yuhji
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013933
Subject(s) - stratosphere , troposphere , atmospheric sciences , oscillation (cell signaling) , northern hemisphere , polar , southern hemisphere , polar night , jet (fluid) , climatology , environmental science , geology , physics , chemistry , astronomy , mechanics , biochemistry
The relationship between the Polar‐night Jet Oscillation (PJO) and the Annular Mode (AM) is examined based on a correlation analysis of winter in both the Northern Hemisphere (NH) and Southern Hemisphere (SH). The PJO becomes a nearly zonally symmetric structure from the troposphere to the upper stratosphere when a pattern similar to the AM appears at the troposphere. If the signal of the PJO is removed, the signal of the AM exists only in the troposphere, and the persistency of the signal is largely reduced in the stratosphere. This suggests that the AM is essentially a tropospheric process that tends to strongly interact with the PJO in the active season.