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Atmospheric excitation of time variable length-of-day on seasonal scales
Ma, LH; Han, YB
2006
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
Volume6Issue:1Pages:120-124
AbstractWe use the method of wavelet transform to analyze the time series of the Earth's rotation rate of the EOP (IERS) C04. The result shows that the seasonal (annual and semiannual) variation of the length-of-day (LOD) has temporal variability in its period length and amplitude. During 1965.0-2001.0, the periods of the semiannual and annual components varied mainly from 175-day to 190-day and from 360-day to 3 70-day, respectively; while their amplitudes varied by more than 0.2 ms and 0.1 ms, respectively. Analyzing the axial component of atmospheric angular momentum (AAM) during this period, we have found that time-variations of period lengths and amplitudes also exist in the seasonal oscillations of the axial AAM and are in good consistency with those of the seasonal LOD change. The time variation of the axial AAM can explain largely the change of the LOD on seasonal scales.
KeywordEarth Rotation Seasonal Variation Wavelet Transform
Indexed BySCI
Language英语
WOS IDWOS:000235501700013
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8329
Collection应用天文研究部
AffiliationChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Ma, LH,Han, YB. Atmospheric excitation of time variable length-of-day on seasonal scales[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2006,6(1):120-124.
APA Ma, LH,&Han, YB.(2006).Atmospheric excitation of time variable length-of-day on seasonal scales.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,6(1),120-124.
MLA Ma, LH,et al."Atmospheric excitation of time variable length-of-day on seasonal scales".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 6.1(2006):120-124.
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