Interannual variation of the east Asian cold surge activity

Tsing Chang Chen, Wan Ru Huang, Jin Ho Yoon

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Abstract

The occurrence frequency of the east Asian cold surge exhibits an interannual variation in concert with the El Niño-Southern Oscillation (ENSO) cycle. That is, the cold surge occurs more (less) frequently during warm (cold) ENSO winters. Because the cold surge high-low dipoles are coupled with the upper-level synoptic short waves, any mechanism modulating the activity of these waves would affect the cold surge activity. The streamfunction budget analysis in the short-wave regime indicates that the development of the cold surge short-wave train over east Asia and the northwest Pacific is modulated by the North Pacific ENSO short-wave train. Due to the coupling between the upper-level cold surge short-wave train and the surface cold surge dipole, it is inferred from this streamfunction budget analysis that the interannual variation of the cold surge occurrence frequency is a result of this modulation.

Original languageEnglish
Pages (from-to)401-413
Number of pages13
JournalJournal of Climate
Volume17
Issue number2
DOIs
Publication statusPublished - 2004 Jan 15

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ASJC Scopus subject areas

  • Atmospheric Science

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