POWER SPECTRUM ANALYSIS OF THE TIME SERIES OF TABRIZ ANNUAL TEMPERATURE

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ASAKEREH H.

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Journal: GEOGRAPHICAL RESEARCH Year:2009 | Volume:24 | Issue:3 (94) Page(s): 33-50

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Information Journal Paper

Title

POWER SPECTRUM ANALYSIS OF THE TIME SERIES OF TABRIZ ANNUAL TEMPERATURE

Author(s)

ASAKEREH H. | Issue Writer Certificate

Keywords

SPECTRUM ANALYSES FREQUENCY OSCILLATION HARMONIC TABRIZ TEMPERATUREQ2

Abstract

A spectral analysis is a technique to discover and analyses of obvious and latent different waves in climatic oscillation. The spectrum yields a measure of distribution of variance in a time series over all possible wavelengths. In this paper the periodic cycles of annual air temperature time series of Tabriz city for 1951-2005 (55 years) have been estimated based on harmonic analyses.Accordingly at first the periodogram smoothed, and then confidence interval of smoothed periodogram estimated to find out the significant cycles. The result of this method in Tabriz shows prominent sinusoidal periodicities at 2-2.6 and 4.5-5 years as well as a non – sinusoidal (trend) cycle. The periodic behaviors are proofed in many other studies as an ENSO or solar activities results and In others as a result of zonal winds change, while the 5 year cycles are related to the error of waveforms over relatively short, finite intervals.

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References

APPLICATION FOURIER MODELS TO ESTIMATE AND PREDICT CLIMATE ELEMENTS "A CASE STUDY: MONTHLY MEAN TEMPERATURE OF MASHHAD CITY MODELING"

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APA: Copy

ASAKEREH, H.. (2009). POWER SPECTRUM ANALYSIS OF THE TIME SERIES OF TABRIZ ANNUAL TEMPERATURE. GEOGRAPHICAL RESEARCH, 24(3 (94)), 33-50. SID. https://sid.ir/paper/30001/en

Vancouver: Copy

ASAKEREH H.. POWER SPECTRUM ANALYSIS OF THE TIME SERIES OF TABRIZ ANNUAL TEMPERATURE. GEOGRAPHICAL RESEARCH[Internet]. 2009;24(3 (94)):33-50. Available from: https://sid.ir/paper/30001/en

IEEE: Copy

H. ASAKEREH, “POWER SPECTRUM ANALYSIS OF THE TIME SERIES OF TABRIZ ANNUAL TEMPERATURE,” GEOGRAPHICAL RESEARCH, vol. 24, no. 3 (94), pp. 33–50, 2009, [Online]. Available: https://sid.ir/paper/30001/en

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