Publication Date:
2020-11-17
Description:
Ongoing sea level variations and vertical land movements measured by tide gauges
and continuous GPS stations along the Italian coasts stem from several factors
acting on different spatiotemporal scales. Conversely to tectonics and anthropogenic
effects, which are characterized by a heterogeneous signal, the adjustment of solid
Earth and geoid to the melting of the late– Pleistocene ice sheets results in a smooth
long–wavelength pattern of sea level variation and vertical deformation across the
Mediterranean, mostly driven by the melt water load added to the basin. In this
work we define upper and lower bounds of the effects of glacial isostatic adjustment
(GIA) on current sea level variations and vertical ground movements along the
coasts of Italy. For plausible mantle viscosity profiles we explore to what extent the spatial variability of observed rates may be attributed to delayed isostatic recovery of both solid Earth and geoid. In addition, we show that long–wavelength patterns of sea level change are tuned by the effects of GIA, and that coastal retreat in Italy is broadly correlated with the expected ongoing rates of post–glacial sea level variations.
Description:
Published
Description:
129-144
Description:
1T. Struttura della Terra
Description:
N/A or not JCR
Description:
open
Keywords:
Sea level, archaeology, geology, geophysics, modelling, climate change
;
04. Solid Earth::04.03. Geodesy::04.03.03. Gravity and isostasy
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
