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The seasonal variations comparison between de-trended continuous GPS and GRACE-modeled loading time series in Southern China, and example time series for sites LUZH, XIAM, GZFG, HBZG, SCSN and ZJJD (red dots in the location map). LUZH and XIAM have longer observational time than other four GPS sites. Blue and green solid lines are fitted by least square (annual plus semi-annual components) for GPS and GRACE, respectively.
