Terrestrial Water Storage Changes in Pearl River Region Derived from the Latest Release Temporal Gravity Field Models" />
<div style="line-height: 150%">Terrestrial Water Storage Changes in Pearl River Region Derived from the Latest Release Temporal Gravity Field Models</div>
Abstract In this paper, we select eight GRACE temporal gravity field models as research objects, including CSR05, GFZ05, JPL05, ITSG-Grace2016, CSR06, GFZ06, JPL06 and ITSG-Grace2018. The terrestrial water storage (TWS) in the Pearl river basin (PRB) from January 2005 to December 2012 is derived from GRACE temporal models processed by the Swenson de-striping filter and 300 km Gaussian smoothing filter algorithm. Finally, the ITSG-Grace2018 model, GLDAS hydrological model, precipitation data and measured groundwater data are selected to comprehensively analyze the variations of TWS in the PRB. The results show that: 1) The accuracy of the release-2006 GRACE temporal gravity field models released by the CSR, JPL and GFZ is significantly improved compared with the release-2005 models. The accuracy of the ITSG-Grace2018 model is also improved compared with the ITSG-Grace2016 model and the difference between the new versions of the temporal gravity field models is smaller. 2) The TWS of the PRB derived from the ITSG-Grace2018 model show an overall upward trend during this period, and seasonal changes are consistent with GLDAS hydrological model, precipitation data and measured groundwater data.
