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GPS-derived ground deformation (2005-2014) within the Gulf of Mexico region referred to a stable Gulf of Mexico reference frame
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|Authors:||Yu, Jiangbo; Wang, Guoquan|
|Author Affiliations:||Primary: |
Sun Yat-sen University, School of Earth Science and Geological Engineering, Guangzhou, China
University of Houston, United States
|Volume Title:||Natural Hazards and Earth System Sciences (NHESS)|
|Source:||Natural Hazards and Earth System Sciences (NHESS), 16(7), p.1583-1602. Publisher: Copernicus GmbH on behalf of the European Geophysical Society, Katlenburg-Lindau, Germany. ISSN: 1561-8633|
|Note:||In English. Includes appendices. 73 refs.; illus., incl. 5 tables|
|Summary:||This study investigates current ground deformation derived from the GPS geodesy infrastructure in the Gulf of Mexico region. The positions and velocity vectors of 161 continuous GPS (CGPS) stations are presented with respect to a newly established local reference frame, the Stable Gulf of Mexico Reference Frame (SGOMRF). Thirteen long-term (> 5 years) CGPS are used to realize the local reference frame. The root mean square (RMS) of the velocities of the 13 SGOMRF reference stations achieves 0.2 mm yr-1 in the horizontal and 0.3 mm yr-1 in the vertical directions. GPS observations presented in this study indicate significant land subsidence in the coastal area of southeastern Louisiana, the greater Houston metropolitan area, and two cities in Mexico (Aguascalientes and Mexico City). The most rapid subsidence is recorded at the Mexico City International airport, which is up to 26.6 cm yr-1 (2008-2014). Significant spatial variation of subsidence rates is observed in both Mexico City and the Houston area. The overall subsidence rate in the Houston area is decreasing. The subsidence rate in southeastern Louisiana is relatively smaller (4.0-6.0 mm yr-1) but tends to be steady over time. This poses a potential threat to the safety of coastal infrastructure in the long-term.|
|Subjects:||Data processing; Displacements; Equations; Faults; Geodesy; Geodetic coordinates; Geologic hazards; Global navigation satellite systems; Global Positioning System; Horizontal movements; Infrastructure; Land subsidence; Natural hazards; Rates; Regional; Safety; Salt tectonics; Shorelines; Spatial variations; Statistical analysis; Tectonics; Time series analysis; Velocity; Vertical movements; Atlantic Ocean; Federal District Mexico; Gulf of Mexico; Harris County Texas; Houston Texas; Louisiana; Mexico; Mexico City Mexico; Mexico state; North Atlantic; Texas; United States; Aguascalientes Mexico; Reference frames; Stable Gulf of Mexico Reference Frame|
|Coordinates:||N160000 N360000 W0760000 W1060000|
|Copyright Information:||GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Copernicus Gesellschaft, Katlenburg-Lindau, Germany|
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