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Post-glacial Sediment Load and Subsidence in Coastal LouisianaSea level rise in the Gulf of Mexico has occurred at a rate of 1.8-2.2 mm/yr during the 20th century, or nearly the same as observed globally due to combined steric and water mass changes. Tide gauges in coastal Louisiana, however, record a substantially larger rate of rise and while a number of causal mechanisms may be responsible, their specific contribution is poorly understood. Using a realistic viscoelastic Earth model, detailed geologic parameters for south Louisiana and new GPS data, we demonstrate that Holocene sedimentary loading in the Gulf and Mississippi River delta is capable of contributing to 1-8 mm/yr of subsidence over areas of 30-0.75 x 10(exp 3) km(exp 2).
Document ID
20080044802
Acquisition Source
Jet Propulsion Laboratory
Document Type
Reprint (Version printed in journal)
Authors
Ivins, Erik R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dokka, Roy K.
(Louisiana State Univ. Baton Rouge, LA, United States)
Blom, Ronald G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 24, 2013
Publication Date
August 17, 2007
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 34
Subject Category
Geophysics
Distribution Limits
Public
Copyright
Other
Keywords
rheology mantle
coastal processes
sedimentary loading
non-tectonic deformation
sea level change

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