Characterizing the Spatial Patterns of Vertical Crustal Deformations Over the South American Continent Based on GNSS Imaging

Xiang, Yang; Yue, Jianping; Liu, Guoliang; Chen, Yuanyuan

doi:10.1007/s00024-022-03144-3

Cited by 2 publications

(1 citation statement)

References 47 publications

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“…Last but not least, most of the data are freely available. There are enough examples of GNSS measurements used to study geodynamic processes on major, minor, and microplates, for example, for the Eurasian Plate in Zhou et al (2016), Li et al (2019), Dimitrov and Nakov (2022), for the African Plate in Saria et al (2014), Savchyn (2023), for the North American Plate in Calais et al (2006), for the South American Plate in Xiang et al (2022) and of course, this list of publications can be extended.…”

Section: Introductionmentioning

confidence: 99%

Tectonic plates moment of inertia and angular momentum determination: the case of the Antarctic plate

Savchyn,

Tretyak

2023

UAJ

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The main goal of this study is to develop and test an algorithm for determining the moment of inertia and angular momentum of a tectonic plate based on the processing of time series of daily solutions of continuous GNSS (Global Navigation Satellite System) stations. The proposed algorithm consists of four consecutive stages: reformatting data to the internal format; dividing the plate into cells and determining their masses; determining the rotation poles and distances from cells to the poles; calculating the plate's moment of inertia and angular momentum. The algorithm uses freely available time series of daily solutions from continuous GNSS stations or any other data prepared in a similar format. The algorithm is tested for determining the moment of inertia and angular momentum of the Antarctic plate based on the processing of time series of daily solutions of continuous GNSS stations for the period 1995-2021. It is confirmed that the Antarctic Plate's rotation poles, moment of inertia, and angular momentum are dynamic parameters. However, additional calculations and in-depth comprehensive analysis are required to determine the causes of such dynamics. As a result of comparing, the dynamics of changes in the Antarctic Plate's rotation poles partially compensate for the unevenness of the Earth's rotation to keep the angular momentum of the Earth constant.

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Section: Introductionmentioning

confidence: 99%

Tectonic plates moment of inertia and angular momentum determination: the case of the Antarctic plate

Savchyn,

Tretyak

2023

UAJ

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Monitoring and Cause Analysis of Land Subsidence along the Yangtze River Utilizing Time-Series InSAR

Chen,

Guo,

et al. 2024

IJGI

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Time-series monitoring of the land subsidence in the Yangtze River coastal area is crucial for maintaining river stability and early warning of disasters. This study employed PS-InSAR and SBAS-InSAR techniques to monitor the land subsidence along the Yangtze River in Nanjing, using a total of 42 Sentinel-1A images obtained between April 2015 and November 2021. The accuracy of both methods was compared and validated, while a comprehensive analysis was conducted to ascertain the spatial distribution characteristics and underlying causes of land subsidence. The maximum deviation between the two methods and six leveling point data did not exceed ±5 mm. Within the 5 km buffer zone on either side of the Yangtze River in Nanjing, four subsidence funnels were identified. Analysis of the factors contributing to land subsidence in this area indicates that underground engineering construction and operation, increasing ground building area, and geological condition all have certain correlations to the land subsidence. The results obtained through PS-InSAR and SBAS-InSAR technologies revealed a high degree of consistency in monitoring outcomes, and the latter method exhibited superior monitoring accuracy than the former one in this area. This study holds significant implications for guiding the scientific management of urban geohazards along the Yangtze River.

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Characterizing the Spatial Patterns of Vertical Crustal Deformations Over the South American Continent Based on GNSS Imaging

Cited by 2 publications

References 47 publications

Tectonic plates moment of inertia and angular momentum determination: the case of the Antarctic plate

Tectonic plates moment of inertia and angular momentum determination: the case of the Antarctic plate

Monitoring and Cause Analysis of Land Subsidence along the Yangtze River Utilizing Time-Series InSAR

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