Crustal vertical deformation of Amazon Basin derived from GPS and GRACE/GFO data over past two decades

In this study, the Gravity Recovery and Climate Experiment (GRACE) satellite observations, combining 71 continuous Global Positioning System (CGPS) data, are used to detect surface vertical loading deformation of the Amazon Basin during 2002–2020. The results show that the maximal annual amplitude o...

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Autores principales:	Jun Fang, Meilin He, Wei Luan, Jiashuang Jiao
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2021
Materias:	Amazon Basin GRACE/GFO GPS Pearson correlation analysis Loading deformation Geodesy QB275-343 Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/f107344ad63b440cb867715e729acac6
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spelling	oai:doaj.org-article:f107344ad63b440cb867715e729acac62021-11-18T04:46:12ZCrustal vertical deformation of Amazon Basin derived from GPS and GRACE/GFO data over past two decades1674-984710.1016/j.geog.2021.09.002https://doaj.org/article/f107344ad63b440cb867715e729acac62021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1674984721000677https://doaj.org/toc/1674-9847In this study, the Gravity Recovery and Climate Experiment (GRACE) satellite observations, combining 71 continuous Global Positioning System (CGPS) data, are used to detect surface vertical loading deformation of the Amazon Basin during 2002–2020. The results show that the maximal annual amplitude of the surface mass changes derived by GRACE is more than 80 cm in terms of the equivalent water height (EWH) in the Amazon Basin. Most part of Amazon experiences mass gain, especially the Amazon River, while there is little mass loss in the northern and eastern parts. Through the Pearson correlation analysis, the monthly de-trended time series of GPS-observed vertical deformation and GRACE-derived mass loading are in good agreement with an average correlation coefficient of about 0.75 throughout the Amazon region. The common seasonal signals of GPS vertical displacements and GRACE/GFO loading deformations are extracted using the stack averaging. The two kinds of common seasonal signals show a good consistency, and together indicate approximate 20 mm peak-to-peak seasonal amplitude. Strong annual variations are identified both in the monthly GPS and GRACE/GFO data by the wavelet analysis. However, the time-frequency spectrum of GPS has more signal details and more significant semi-annual variations than that of GRACE/GFO. These results may contribute to the understanding of secular crustal vertical deformation in the Amazon Basin.Jun FangMeilin HeWei LuanJiashuang JiaoKeAi Communications Co., Ltd.articleAmazon BasinGRACE/GFOGPSPearson correlation analysisLoading deformationGeodesyQB275-343Geophysics. Cosmic physicsQC801-809ENGeodesy and Geodynamics, Vol 12, Iss 6, Pp 441-450 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Amazon Basin GRACE/GFO GPS Pearson correlation analysis Loading deformation Geodesy QB275-343 Geophysics. Cosmic physics QC801-809
spellingShingle	Amazon Basin GRACE/GFO GPS Pearson correlation analysis Loading deformation Geodesy QB275-343 Geophysics. Cosmic physics QC801-809 Jun Fang Meilin He Wei Luan Jiashuang Jiao Crustal vertical deformation of Amazon Basin derived from GPS and GRACE/GFO data over past two decades
description	In this study, the Gravity Recovery and Climate Experiment (GRACE) satellite observations, combining 71 continuous Global Positioning System (CGPS) data, are used to detect surface vertical loading deformation of the Amazon Basin during 2002–2020. The results show that the maximal annual amplitude of the surface mass changes derived by GRACE is more than 80 cm in terms of the equivalent water height (EWH) in the Amazon Basin. Most part of Amazon experiences mass gain, especially the Amazon River, while there is little mass loss in the northern and eastern parts. Through the Pearson correlation analysis, the monthly de-trended time series of GPS-observed vertical deformation and GRACE-derived mass loading are in good agreement with an average correlation coefficient of about 0.75 throughout the Amazon region. The common seasonal signals of GPS vertical displacements and GRACE/GFO loading deformations are extracted using the stack averaging. The two kinds of common seasonal signals show a good consistency, and together indicate approximate 20 mm peak-to-peak seasonal amplitude. Strong annual variations are identified both in the monthly GPS and GRACE/GFO data by the wavelet analysis. However, the time-frequency spectrum of GPS has more signal details and more significant semi-annual variations than that of GRACE/GFO. These results may contribute to the understanding of secular crustal vertical deformation in the Amazon Basin.
format	article
author	Jun Fang Meilin He Wei Luan Jiashuang Jiao
author_facet	Jun Fang Meilin He Wei Luan Jiashuang Jiao
author_sort	Jun Fang
title	Crustal vertical deformation of Amazon Basin derived from GPS and GRACE/GFO data over past two decades
title_short	Crustal vertical deformation of Amazon Basin derived from GPS and GRACE/GFO data over past two decades
title_full	Crustal vertical deformation of Amazon Basin derived from GPS and GRACE/GFO data over past two decades
title_fullStr	Crustal vertical deformation of Amazon Basin derived from GPS and GRACE/GFO data over past two decades
title_full_unstemmed	Crustal vertical deformation of Amazon Basin derived from GPS and GRACE/GFO data over past two decades
title_sort	crustal vertical deformation of amazon basin derived from gps and grace/gfo data over past two decades
publisher	KeAi Communications Co., Ltd.
publishDate	2021
url	https://doaj.org/article/f107344ad63b440cb867715e729acac6
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Crustal vertical deformation of Amazon Basin derived from GPS and GRACE/GFO data over past two decades

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