Moho Interface Changes Beneath the Tibetan Plateau Based on GRACE Data

Rao, Weilong; Sun, Wenke

doi:10.1029/2020jb020605

Cited by 12 publications

(12 citation statements)

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“…The Climate Prediction Center (CPC) of the National Oceanic and Atmospheric Administration (NOAA) provides a dataset of CPC hydrological models [64]. Compared with the GLDAS model, the CPC model uses more measurement data so that it greatly enhances the usability of real-time data [53]. Therefore, the SM data provided by CPC data is adopted in data processing.…”

Section: Cpc Hydrological Modelmentioning

confidence: 99%

“…The Kriging interpolation method is used to obtain the regular grid vertical velocity field data in the study area, which is usually suitable for data interpolation with uneven distribution [51,52,69]. The deformation characteristics of GPS observations are usually the superposition of GIA, tectonic activity, and surface loading deformation [20,53]. We need to separate or correct surface loading information and GIA changes to obtain mass changes caused by tectonic activities.…”

Section: Vertical Velocities Caused By Surface Movementmentioning

confidence: 99%

“…Hydrological factors mainly include changes in SM, SWE, GW, LWS, glacier changes and other signals, while TECs usually lead to the vertical movement of the crust, including surface uplift, surface erosion and sedimentation and Moho depth changes, etc. They generally satisfy the following relationships [52,53]:…”

Section: Tectonic Information Acquisitionmentioning

confidence: 99%

“…The tectonic information obtained by the calculation method provided in Section 3.7 mainly includes surface uplift (subsidence) changes, sedimentation and erosion changes, GIA effect and Moho changes [53]. The method of Section 3.8 is used to estimate the mass change caused by surface deformation (EWH), and then the surface deformation information will be deducted from the tectonic information to get the mass changes caused by Moho changes (EWH).…”

Section: Estimation Of Moho Interface Changesmentioning

confidence: 99%

“…Jiao et al [52] extracted tectonic signals of the Tibetan Plateau by using GRACE data, GPS data and hydrological model and further interpreted the tectonic signals as the result of the Moho changes. Rao and Sun [53] considered the impact of erosion and sedimentation on the Tibetan Plateau documented by the previous works and used GRACE data to conduct a further research on the changes of Moho interface and crustal thickness beneath the Tibetan Plateau. Previous studies have manifested that GRACE observations, combined with other Earth science data, can provide effective estimates and explanations for Earth surface information changes caused by subsurface mass migration.…”

Section: Introductionmentioning

confidence: 99%

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GRACE Data Explore Moho Change Characteristics Beneath the South America Continent near the Chile Triple Junction

Sun

Guo

2022

Remote Sensing

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The internal and external mass migration and redistribution of the Earth system are usually accompanied by changes in the gravity field, and the Gravity Recovery and Climate Experiment (GRACE) has been proven to be able to effectively monitor and evaluate such changes. The Chile Triple Junction (CTJ) is the convergence point of the Nazca plate, the Antarctic plate and the South American plate. Subductions of different forms and rates in the north and south of the CTJ have varying degrees of impact on the surface and underground material changes of the South American plate. In this study, GRACE data are used in the estimation of the comprehensive mass changes in the South America Continent (SAC) Near the CTJ (~15° range). In addition, surface movement changes constrained by GNSS data cannot fully explain the GRACE results after deducting hydrological information, which indicates that residual signals might be attributed to mass changes beneath the crust, that is, the Moho interface deformation. After eliminating surface movement and hydrological signals from the comprehensive mass changes of GRACE, this study obtains the deep structural information and calculates the Moho changes of three significant regions with rates of −2.12 ± 0.67 cm/yr, 0.18 ± 0.19 cm/yr and −6.46 ± 1.31 cm/yr, respectively. Results have demonstrated that the subductions of the Nazca plate and the Antarctica plate have an effect on the uneven deformation of the Moho interface beneath the SAC. The Moho beneath the SAC mainly shows a deepening trend, but it is uplifted in some areas north of CTJ. On the whole, the rate of Moho changes is greater in the south than in the north. The relationship between Moho changes and surface changes also indicates that a longer timescale may be needed for maintaining isostatic balance.

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Section: Cpc Hydrological Modelmentioning

confidence: 99%