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 revealed relative maxima of power in the frequncy bands of 200 months (~16. 7 years), 25 months (the quasi-biennial oscillation), 5-6 months, and 2-3 months. Cross-spectal characteristics between chebyshev coefficients and the Southern Oscillation Index (SOI) were also explored. Coherency spectrum for the zonal (A₀₁) and meridional (A₁₀) circulation index with the SOI was significant near 4 years, the QBO, and 2-3 months. Some physical reasons were offered for the spatial linkages (i. e. , teleconnections) between the SO and atmospheric circulation anomalies over East Asia.