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Interhemispheric Synchronization Between the AO and the AAO
Author(s) -
Tachibana Y.,
Inoue Y.,
Komatsu K. K.,
Nakamura T.,
Honda M.,
Ogata K.,
Yamazaki K.
Publication year - 2018
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 - 10.1029/2018gl081002
Subject(s) - teleconnection , climatology , stratosphere , arctic oscillation , circumpolar star , zonal and meridional , troposphere , quasi biennial oscillation , oscillation (cell signaling) , environmental science , geology , atmospheric sciences , northern hemisphere , el niño southern oscillation , oceanography , biology , genetics
Teleconnections between lower and higher latitude regions are widely known in both the Northern and Southern Hemispheres. To broaden our view of these teleconnections, we searched a reanalysis data set for evidence of a teleconnection between the Arctic Oscillation (AO) and the Antarctic Oscillation (AAO), two widely separated circumpolar phenomena. Statistical analysis of the Japanese 55‐year reanalysis data set showed significant in‐phase synchronization between the AO and AAO, particularly in October and February, with a vertical structure extending from the troposphere to the stratosphere. This vertical structure may suggest a stratospheric control, and we did not find a significant signature indicating a tropical ocean control. We also observed decadal‐scale modulation of the synchronicity. Observational evidence implies that the stratospheric meridional circulation may be responsible for AO‐AAO synchronization.