Analysis and prediction of polar motion using MSSA method
Abstract Polar motion is the movement of the Earth's rotational axis relative to its crust, reflecting the influence of the material exchange and mass redistribution of each layer of the Earth on the Earth's rotation axis. To better analyze the temporally varying characteristics of polar m...
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Online Access: | https://doi.org/10.1186/s40623-021-01477-2 |
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doaj-7540cbe44ad34669bd85306c926b1f9f2021-07-25T11:34:24ZengSpringerOpenEarth, Planets and Space1880-59812021-07-0173111310.1186/s40623-021-01477-2Analysis and prediction of polar motion using MSSA methodXin Jin0Xin Liu1Jinyun Guo2Yi Shen3College of Geodesy and Geomatics, Shandong University of Science and TechnologyCollege of Geodesy and Geomatics, Shandong University of Science and TechnologyCollege of Geodesy and Geomatics, Shandong University of Science and TechnologySchool of Geographical Sciences, Xinyang Normal UniversityAbstract Polar motion is the movement of the Earth's rotational axis relative to its crust, reflecting the influence of the material exchange and mass redistribution of each layer of the Earth on the Earth's rotation axis. To better analyze the temporally varying characteristics of polar motion, multi-channel singular spectrum analysis (MSSA) was used to analyze the EOP 14 C04 series released by the International Earth Rotation and Reference System Service (IERS) from 1962 to 2020, and the amplitude of the Chandler wobbles were found to fluctuate between 20 and 200 mas and decrease significantly over the last 20 years. The amplitude of annual oscillation fluctuated between 60 and 120 mas, and the long-term trend was 3.72 mas/year, moving towards N56.79 °W. To improve prediction of polar motion, the MSSA method combining linear model and autoregressive moving average model was used to predict polar motion with ahead 1 year, repeatedly. Comparing to predictions of IERS Bulletin A, the results show that the proposed method can effectively predict polar motion, and the improvement rates of polar motion prediction for 365 days into the future were approximately 50% on average.https://doi.org/10.1186/s40623-021-01477-2Polar motionMulti-channel singular spectrum analysisTime series analysis and predictionAutoregressive moving average |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xin Jin Xin Liu Jinyun Guo Yi Shen |
spellingShingle |
Xin Jin Xin Liu Jinyun Guo Yi Shen Analysis and prediction of polar motion using MSSA method Earth, Planets and Space Polar motion Multi-channel singular spectrum analysis Time series analysis and prediction Autoregressive moving average |
author_facet |
Xin Jin Xin Liu Jinyun Guo Yi Shen |
author_sort |
Xin Jin |
title |
Analysis and prediction of polar motion using MSSA method |
title_short |
Analysis and prediction of polar motion using MSSA method |
title_full |
Analysis and prediction of polar motion using MSSA method |
title_fullStr |
Analysis and prediction of polar motion using MSSA method |
title_full_unstemmed |
Analysis and prediction of polar motion using MSSA method |
title_sort |
analysis and prediction of polar motion using mssa method |
publisher |
SpringerOpen |
series |
Earth, Planets and Space |
issn |
1880-5981 |
publishDate |
2021-07-01 |
description |
Abstract Polar motion is the movement of the Earth's rotational axis relative to its crust, reflecting the influence of the material exchange and mass redistribution of each layer of the Earth on the Earth's rotation axis. To better analyze the temporally varying characteristics of polar motion, multi-channel singular spectrum analysis (MSSA) was used to analyze the EOP 14 C04 series released by the International Earth Rotation and Reference System Service (IERS) from 1962 to 2020, and the amplitude of the Chandler wobbles were found to fluctuate between 20 and 200 mas and decrease significantly over the last 20 years. The amplitude of annual oscillation fluctuated between 60 and 120 mas, and the long-term trend was 3.72 mas/year, moving towards N56.79 °W. To improve prediction of polar motion, the MSSA method combining linear model and autoregressive moving average model was used to predict polar motion with ahead 1 year, repeatedly. Comparing to predictions of IERS Bulletin A, the results show that the proposed method can effectively predict polar motion, and the improvement rates of polar motion prediction for 365 days into the future were approximately 50% on average. |
topic |
Polar motion Multi-channel singular spectrum analysis Time series analysis and prediction Autoregressive moving average |
url |
https://doi.org/10.1186/s40623-021-01477-2 |
work_keys_str_mv |
AT xinjin analysisandpredictionofpolarmotionusingmssamethod AT xinliu analysisandpredictionofpolarmotionusingmssamethod AT jinyunguo analysisandpredictionofpolarmotionusingmssamethod AT yishen analysisandpredictionofpolarmotionusingmssamethod |
_version_ |
1721282981259116544 |