极地研究2025，Vol.37Issue(2)：189-197,9.DOI:10.13679/j.jdyj.20230047
西南极GPS测站高程时间序列周期特征分析
Periodicity of GPS height time series in West Antarctica
摘要
Abstract
Analysis of the periodicity of height time series of regional Global Position System(GPS)reference stations is vital when studying geophysical phenomena such as plate tectonics,postglacial rebound,and sea level changes at different spatiotemporal scales.In this study,using BERNESE 5.2 software for dou-ble-difference positioning,observational data acquired over 11 a at 63 GPS stations in West Antarctica were processed,and single-day coordinate time series were derived for each station under the ITRF2014 frame-work.Wavelet multiscale decomposition and singular spectrum analysis were combined to eliminate noise in the height time series.The fast Fourier transform method was applied to analyze the spectra and periodicity of the time series,and the harmonic analysis method was used to extract the amplitude and phase of the an-nual cycle of the height time series and its distributional characteristics.Results revealed that the height time series of the GPS stations not only have periodicity of 1 a,0.5 a,0.3 a,2 months,and 1 month,but also have longer periodic signals,e.g.,2,4.2,and 6.3 a,with periodicity of 1,2,and 0.5 a being most notable.The amplitude of the annual cycle of observations is 0.9～8.2 mm,with gradual increase from coastal to inland areas.The peak of the annual cycle occurs during January—June,and there is no statistically significant correlation between its distribution and latitude.The findings of this study,demonstrating that the height time series of GPS stations in West Antarctica exhibit multiscale periodicity,provide scientific support for in-depth interpretation of relevant geophysical phenomena.关键词
全球定位系统(GPS)/高程时间序列/周期项提取/年周期/西南极Key words
GPS/heighttime series/period extraction/annual cycle/West Antarctica引用本文复制引用
王朝阳,邢喆,马丹,孙毅,王剑..西南极GPS测站高程时间序列周期特征分析[J].极地研究,2025,37(2):189-197,9.基金项目
国家自然科学基金(42206200)和极地考察业务化与科研项目(121153000000200027)资助 （42206200）
