Abstract Lake Qinghai mass variation can cause local crustal deformation and lake level is sensitive to the change of regional climate. Hence, in order to explore the possibility of the Global Positioning System (GPS) technology to monitor the water-induced crustal deformation, we use the Cryosat-2/SIRAL altimeter data to investigate the variations of Lake Qinghai level and its impacts on local crustal deformation from July 1, 2010 to December 31, 2018. We apply the load Green's function method to model the loading deformation field around the Lake Qinghai region and compared it with GPS measurements. The results show that the Cryosat-2/SIRAL altimeter can effectively monitor the water level changes of Lake Qinghai, and the lake water level rises at a rate of 0.19 m/yr and exhibits obvious seasonality. The vertical deformation is more sensitive to changes in water level than the horizontal deformation. The apparent loading displacements induced by lake level change are mainly distributed within 25 km of the boundary of Lake Qinghai, with the horizontal and vertical displacements exceeding 1 and −3 mm, respectively. Furthermore, the accumulative vertical and horizontal displacements of −7 and 2 mm are found at the boundary of Lake Qinghai during the period from July 1, 2010 to December 31, 2018 and the detected linear trend of displacements are about −0.70 mm/yr and 0.15 mm/yr, respectively. The modeled loading displacements and GPS measurements at QHGC station have good trend consistency in the vertical component, but the amplitude consistency and correlation coefficient are not satisfactory, which may be caused by the resolution of GPS data, the uncertainty of modeled loading displacement and the remote geographical location of QHGC station. The feasibility to monitor the local crustal deformation caused by Lake Qinghai level change with geodetic techniques such as Global Navigation Satellite System (GNSS) still needs further study.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Lake level changes determined by Cryosat-2 altimetry data and water-induced loading deformation around Lake Qinghai


    Beteiligte:
    Xu, Xiaofeng (Autor:in) / Yuan, Linguo (Autor:in) / Jiang, Zhongshan (Autor:in) / Chen, Changfu (Autor:in) / Cheng, Shuai (Autor:in)

    Erschienen in:

    Advances in Space Research ; 66 , 11 ; 2568-2582


    Erscheinungsdatum :

    2020-08-21


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Estimation of River and Lake Heights Using CryoSat-2 Altimetry

    Villadsen, H. / Andersen, O.B. / Stenseng, L. et al. | British Library Conference Proceedings | 2013


    Lake and Reservoir Water Level Measurements from ICESat Laser Altimetry

    Boy, J.-P. / Carabajal, C.C. | British Library Conference Proceedings | 2013


    Inland Water SAR Altimetry: New Techniques and Methods for the Hydrological Exploitation of CryoSat Data

    Dinardo, S. / Bercher, N. / Lucas, B.M. et al. | British Library Conference Proceedings | 2014


    Constraining Ice Sheet Mass Balance Trends Using Cryosat-2 and Laser Altimetry

    Schon, N. / Griggs, J.A. / Bamber, J.L. | British Library Conference Proceedings | 2013


    A Toolkit for CryoSat Investigations by the ESRIN EOP-SER Altimetry Team

    Dinardo, S. / Lucas, B.M. / Benveniste, J. et al. | British Library Conference Proceedings | 2014