Earth rotation and ENSO events: Combined excitation of interannual LOD variations by multiscale atmospheric oscillations

Dawei Zheng, Xiaoli Ding, Yonghong Zhou, Yongqi Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)

Abstract

Time series of the length of day characterizing the rate of Earth rotation, the atmospheric angular momentum and the Southern Oscillation Index from 1962 to 2000 are used to reexamine the relationships between the ENSO events and the changes in the length of day, as well as the global atmospheric angular momentum. Particular attention is given to the different effects of the 1982-1983 and 1997-1998 ENSO events on the variations of Earth rotation. The combined effects of multiscale atmospheric oscillations (seasonal, quasi-biennial and ENSO time scales) on the anomalous variations of the interannual rates of Earth rotation are revealed in this paper by studying the wavelet spectra of the data series.
Original languageEnglish
Pages (from-to)89-97
Number of pages9
JournalGlobal and Planetary Change
Volume36
Issue number1-2
DOIs
Publication statusPublished - 1 Mar 2003

Keywords

  • Atmospheric angular momentum
  • ENSO
  • Variation of Earth rotation
  • Wavelet spectrum

ASJC Scopus subject areas

  • Earth-Surface Processes

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