Coupling of the Quasi‐Biweekly Oscillation of the Tibetan Plateau Summer Monsoon With the Arctic Oscillation | Zendy

Wang Meirong | Zendy; Wang Jun | Zendy; Duan Anmin | Zendy; Liu Yimin | Zendy; Zhou Shunwu | Zendy

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Coupling of the Quasi‐Biweekly Oscillation of the Tibetan Plateau Summer Monsoon With the Arctic Oscillation

Author(s) -

Wang Meirong,

Wang Jun,

Duan Anmin,

Liu Yimin,

Zhou Shunwu

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 - 10.1029/2018gl077136

Subject(s) - plateau (mathematics) , climatology , baroclinity , arctic oscillation , middle latitudes , oscillation (cell signaling) , geology , monsoon , barotropic fluid , atmospheric sciences , madden–julian oscillation , rossby wave , kelvin wave , flux (metallurgy) , the arctic , troposphere , physics , oceanography , meteorology , mathematical analysis , convection , mathematics , materials science , northern hemisphere , biology , metallurgy , genetics

The intraseasonal variation of the Tibetan Plateau summer monsoon (TPSM) during 1979–2011 is investigated. The TPSM shows a dominant quasi‐biweekly oscillation (QBWO) in most summer seasons, and its active/break phases are closely related to more/less precipitation over the Tibetan Plateau. We suggest that the TPSM QBWO is associated with a southeastward propagating nonstationary wave train in the middle and upper troposphere. It shows equivalent barotropic vertical structures over the midlatitudes and a baroclinic structure over the eastern Tibetan Plateau. Wave activity flux analysis indicates that it originates from northern Europe, which is an active center of the summertime Arctic Oscillation (AO). The AO also shows significant QBWO signals and leads TPSM QBWO by about 13 days. Phase composite and wave activity flux analyses of AO QBWO confirmed that the wave train influences TPSM QBWO, suggesting that AO plays an important role in the TPSM on a 10‐ to 20‐day timescale.

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