Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3533
Authors: Piromallo, C.* 
Spada, G.* 
Sabadini, R.* 
Ricard, Y.* 
Title: Relative sea level variations caused by subduction
Issue Date: 1997
Series/Report no.: /18(1997)
URI: http://hdl.handle.net/2122/3533
Keywords: dynamic topography
geoid
sea level
subduction
viscosity profile
Subject Classification04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics 
Abstract: By means of a stratified Earth model with viscoelastic rheology, we have studied the long-term global fluctuations of Relative Sea Level (RSL) induced by subducting slabs. We have computed RSL variations for both a single subduction and a realistic distribution of slabs by a numerical simulation based on a simplified model of the subduction process. RSL is determined by the offset between the geoid and the dynamic topography; our analysis demonstrates that the latter provides the prevailing contribution. We have studied, in addition, the effects of rheological stratification upon the amplitude and time-evolution of these two quantities and, consequently, of RSL fluctuations. According to our results, an upper bound for the rate of RSL associated with subduction is of the order of 0.1 mm/yr, in agreement with previous studies. This rate of sea level variation is comparable with that attributed to changes in the tectonic regime on a large scale. This preliminary result corroborates the suggestion by other authors to include subduction in the list of geophysical mechanisms which contribute to long-term RSL fluctuations.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Piromallo_etal_SG_1997.pdfMain article257.42 kBAdobe PDFView/Open
Show full item record

Page view(s)

83
Last Week
0
Last month
0
checked on Aug 19, 2018

Download(s)

20
checked on Aug 19, 2018

Google ScholarTM

Check