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Atmospheric quasi-14 month fluctuation and excitation of the Chandler wobble

Earth, Planets and Space volume 55, pages e25–e28 (2003)Cite this article

Abstract

A quasi-14 month fluctuation in the atmospheric excitation function for the Earth’s wobble is discussed by using the re-analysis data of the European Center for Medium-range Weather Forecast for the 14 years between 1980 and 1993. The spectrum of the atmospheric wind excitation function shows a striking peak near the 14-month period. As a result, the atmospheric (wind plus pressure) excitation function shows exactly the same power as that of the geodetic excitation function inferred from the observed wobble at the Chandler wobble frequency (about 14 months), suggesting that the atmosphere excited the Chandler wobble between 1980 and 1993. The wind fluctuation comes mostly from the tropospheric wind.

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Author notes

  1. Tetsuya Iwabuchi

    Present address: University Coorperation for Atmospheric Research, Boulder, USA

Authors and Affiliations

  1. Radio Science Center for Space and Atmosphere, Kyoto University, Uji, Japan

    Yuichi Aoyama

  2. National Astronomical Observatory, Graduate University for Advanced Studies, Tokyo, Japan

    Isao Naito

  3. Meteorological Research Institute, Tsukuba, Japan

    Tetsuya Iwabuchi & Nobuo Yamazaki

Authors
  1. Yuichi Aoyama
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  2. Isao Naito
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  3. Tetsuya Iwabuchi
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  4. Nobuo Yamazaki
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Correspondence to Yuichi Aoyama.

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Aoyama, Y., Naito, I., Iwabuchi, T. et al. Atmospheric quasi-14 month fluctuation and excitation of the Chandler wobble. Earth Planet Sp 55, e25–e28 (2003). https://doi.org/10.1186/BF03352480

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