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Analysis of polar motion variations from 170-year observation series

Transactions of IAA RAS, issue 26, 44–53 (2012)

Keywords: polar motion, harmonic, Chandler wobble

Abstract

This work is devoted to investigation of low frequency variations in Polar motion (PM). It has been shown that the main PM features can be effectively investigated using not only time series of the Pole coordinates, but also using series of latitude variations obtained from observations at one observatory. Such an approach allows us to increase the length of observation series available for analysis. In our study, we extended the IERS PM series back to 1840. We investigate trends and (quasi) harmonic oscillations with periods from one year to decades. The main results were obtained making use of the Singular Spectrum Analysis. Other methods were also used for specific analysis and independent check. The most interesting results are detection of two new large phase jumps in the 1840s and 2000s, and revealing of 80-year period in the PM variations.

Citation

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RIS

N. Miller, Z. Malkin. Analysis of polar motion variations from 170-year observation series // Transactions of IAA RAS. — 2012. — Issue 26. — P. 44–53.

@article{miller2012,
  abstract = {This work is devoted to investigation of low frequency variations in Polar motion (PM). It has been shown that the main PM features can be effectively investigated using not only time series of the Pole coordinates, but also using series of latitude variations obtained from observations at one observatory. Such an approach allows us to increase the length of observation series available for analysis. In our study, we extended the IERS PM series back to 1840. We investigate trends and (quasi) harmonic oscillations with periods from one year to decades. The main results were obtained making use of the Singular Spectrum Analysis. Other methods were also used for specific analysis and independent check. The most interesting results are detection of two new large phase jumps in the 1840s and 2000s, and revealing of 80-year period in the PM variations.},
  author = {N. Miller and Z. Malkin},
  issue = {26},
  journal = {Transactions of IAA RAS},
  keyword = {polar motion, harmonic, Chandler wobble},
  pages = {44--53},
  title = {Analysis of polar motion variations from 170-year observation series},
  url = {http://iaaras.ru/en/library/paper/897/},
  year = {2012}
}

TY  - JOUR
TI  - Analysis of polar motion variations from 170-year observation series
AU  - Miller, N.
AU  - Malkin, Z.
PY  - 2012
T2  - Transactions of IAA RAS
IS  - 26
SP  - 44
AB  - This work is devoted to investigation of low frequency variations in
Polar motion (PM). It has been shown that the main PM features can be
effectively investigated using not only time series of the Pole
coordinates, but also using series of latitude variations obtained
from observations at one observatory. Such an approach allows us to
increase the length of observation series available for analysis. In
our study, we extended the IERS PM series back to 1840. We
investigate trends and (quasi) harmonic oscillations with periods
from one year to decades. The main results were obtained making use
of the Singular Spectrum Analysis. Other methods were also used for
specific analysis and independent check. The most interesting results
are detection of two new large phase jumps in the 1840s and 2000s,
and revealing of 80-year period in the PM variations.
UR  - http://iaaras.ru/en/library/paper/897/
ER  -