Interannual variations in the length of day and ENSO events in 1982-1983 and 1997-1998

Dawei Zheng, Yonghong Zhou, Xinhao Liao, Xiaoli Ding, Yongqi Chen, Jason Chao, Zhilin Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

The length of day series during the period of 1962.0 - 2000.0, the atmospheric angular momentum and the Southern Oscillation Index are adopted to analyze the relationships among the ENSO events that have occurred since 1960, the changes in the length of day and the atmospheric angular momentum. Attention is particularly given to the different effects of the 1982-1983 and 1997-1998 ENSO events on the variations of Earth rotation. The synthetic excitation effects of multi-scale atmospheric oscillations on the anomalous variations of the interannual rates of Earth rotation are revealed by means of the time-frequency spectrum of the wavelet transform.
Original languageEnglish
Pages (from-to)128-136
Number of pages9
JournalScience in China, Series A: Mathematics, Physics, Astronomy
Volume44
Issue number1
DOIs
Publication statusPublished - 1 Jan 2001

Keywords

  • Atmospheric angular momentum
  • Change in length of day
  • ENSO events

ASJC Scopus subject areas

  • General

Cite this