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En tidsseriestudie av varviga sjösediment fra?n Kassjön

This thesis aims to analyse a time series containing the annual accumulation rate of minerogenic matter in the lake Kassjo?n. First there is a theoretical survey of some frequently used tools for the analysis of time series in the time domain and in the frequency domain. This survey is followed by a simulation study that illustrates how the theoretical tools work in practice. After this, the time series "toolbox" is used to analyse the time series from Kassjo?n (5701 data points). The time series data is analysed in the time domain as well as in the frequency domain. The time domain study focuses on the behaviour of the autocorrelation and the partial autocorrelation function. The frequency domain study analyses the standard periodogram and the periodogram smoothed with Tukey weights. The periodogram study tells us that the important components - for the behaviour of the series - are those with low angular frequency which corresponds to slow oscillations. The interesting cycles are approximately 330 years and can be identified more or less throughout the series. 

Författare

Per-Ola Carlén

Lärosäte och institution

Umeå universitet/Institutionen för matematik och matematisk statistik

Nivå:

"Masteruppsats". Självständigt arbete (examensarbete) om 30 högskolepoäng (med vissa undantag) utfört för att erhålla masterexamen.

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