<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The Earth's pole moves on the Earth's surface along the spiral curve known as "polhody". Polhody computed from the IERS C04 pole coordinates were compared with those computed after removing successively oscillations with periods shorter than 150, 30, 10, 2 days. The comparison of these polhody show that the loops in the winter seasons of 2005-2006 and 1999-2000 are caused by the oscillations of polar motion with periods shorter than 30 days. These short periodical oscillations of geodetic excitation function of polar motion were correlated with those of the atmospheric and oceanic excitation functions. There are high correlations with coefficients equal to 0.8-0.9 during epochs when loops occur.</p></abstract>

The Earth's pole moves on the Earth's surface along the spiral curve known as "polhody". Polhody computed from the IERS C04 pole coordinates were compared with those computed after removing successively oscillations with periods shorter than 150, 30, 10, 2 days. The comparison of these polhody show that the loops in the winter seasons of 2005-2006 and 1999-2000 are caused by the oscillations of polar motion with periods shorter than 30 days. These short periodical oscillations of geodetic excitation function of polar motion were correlated with those of the atmospheric and oceanic excitation functions. There are high correlations with coefficients equal to 0.8-0.9 during epochs when loops occur.

Spectral Characteristic of Polar Motion in the 2005-2006 and 1999-2000 Winters Seasons

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The Earth's pole moves on the Earth's surface along the spiral curve known as "polhody". Polhody computed from the IERS C04 pole coordinates were compared with...

Spectral Characteristic of Polar Motion in the 2005-2006 and 1999-2000 Winters Seasons

Publié en ligne: 10 déc. 2007

Pages: 1 - 7

DOI: https://doi.org/10.2478/v10018-007-0013-5

Mots clés
Polar motion loops, short periodic oscillations of polar motin and geophysical excitation

This content is open access.

Spectral Characteristic of Polar Motion in the 2005-2006 and 1999-2000 Winters Seasons

Publié en ligne: 10 déc. 2007

Pages: 1 - 7

DOI: https://doi.org/10.2478/v10018-007-0013-5

Mots clésPolar motion loops, short periodic oscillations of polar motin and geophysical excitation

This content is open access.

Mots clés
Polar motion loops, short periodic oscillations of polar motin and geophysical excitation