On the Couplings between Chebyshev Coefficients as Derived from the Monthly Mean Geopotential Fields at 500 hPa over East Asia and the Southern Oscillation

Chen Wanlong; Chu Pao-Shin

doi:10.1007/BF03179766

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Volume 7 Issue 3

Jul. 1990

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Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1990 > 7(3): 347-353

On the Couplings between Chebyshev Coefficients as Derived from the Monthly Mean Geopotential Fields at 500 hPa over East Asia and the Southern Oscillation

1.
Department of Meteorology, Nanjing Institute of Meteorology, Nanjing 210044,Department of Meteorology, University of Hawaii, Honolulu, Hawaii 96822, U.S.A.

doi: 10.1007/BF03179766

Abstract
References
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Abstract:
The first six Chebyshev polynomial coefficients (i.e., A00, A01, A10, A11, A02, A20) were derived from monthly mean geopotential height over East Asia for the period 1951－1983. Spectral analysis of these coefficients reveals rela-tive maxima of power in the frequency bands of 200 months (~ 16.7 years), 25 months (the quasi-biennial oscillation), 5-6 months, and 2-3 months. Cross-spectral characteristics between Chebyshev coefficients and the Southern Oscillation Index (SOI) were also explored. Coherence spectrum for the zonal and meridional circulation index (A01 and A10) with the SOI was significant near 4 years, the QBO, and 2-3 months. Some physical explanations were offered for the spatial linkages (i.e., teleconnections) between the SO and atmospheric circulation anomalies over East Asia.
References

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Manuscript History

Manuscript received: 10 July 1990

Manuscript revised: 10 July 1990

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

On the Couplings between Chebyshev Coefficients as Derived from the Monthly Mean Geopotential Fields at 500 hPa over East Asia and the Southern Oscillation

1. Department of Meteorology, Nanjing Institute of Meteorology, Nanjing 210044,Department of Meteorology, University of Hawaii, Honolulu, Hawaii 96822, U.S.A.

Manuscript received: 1990-07-10
Manuscript revised: 1990-07-10

Abstract: The first six Chebyshev polynomial coefficients (i.e., A00, A01, A10, A11, A02, A20) were derived from monthly mean geopotential height over East Asia for the period 1951－1983. Spectral analysis of these coefficients reveals rela-tive maxima of power in the frequency bands of 200 months (~ 16.7 years), 25 months (the quasi-biennial oscillation), 5-6 months, and 2-3 months. Cross-spectral characteristics between Chebyshev coefficients and the Southern Oscillation Index (SOI) were also explored. Coherence spectrum for the zonal and meridional circulation index (A01 and A10) with the SOI was significant near 4 years, the QBO, and 2-3 months. Some physical explanations were offered for the spatial linkages (i.e., teleconnections) between the SO and atmospheric circulation anomalies over East Asia.