Vertical Crustal Motion along the Mediterranean and Black Sea Coast Derived from Ocean Altimetry and Tide Gauge Data |
| |
Authors: | D García I Vigo B F Chao M C Martínez |
| |
Institution: | (1) Space Geodesy Laboratory, Department of Applied Mathematics, University of Alicante, Alicante, Spain;(2) College of Earth Sciences, National Central University, Chung-li, Taiwan, ROC |
| |
Abstract: | Tide gauge (TG) data along the northern Mediterranean and Black Sea coasts are compared to the sea-surface height (SSH) anomaly
obtained from ocean altimetry (TOPEX/Poseidon and ERS-1/2) for a period of nine years (1993–2001). The TG measures the SSH
relative to the ground whereas the altimetry does so with respect to the geocentric reference frame; therefore their difference
would be in principle a vertical ground motion of the TG sites, though there are different error sources for this estimate
as is discussed in the paper. In this study we estimate such vertical ground motion, for each TG site, from the slope of the
SSH time series of the (non-seasonal) difference between the TG record and the altimetry measurement at a point closest to
the TG. Where possible, these estimates are further compared with those derived from nearby continuous Global Positioning
System (GPS) data series. These results on vertical ground motion along the Mediterranean and Black Sea coasts provide useful
source data for studying, contrasting, and constraining tectonic models of the region. For example, in the eastern coast of
the Adriatic Sea and in the western coast of Greece, a general subsidence is observed which may be related to the Adriatic
lithosphere subducting beneath the Eurasian plate along the Dinarides fault. |
| |
Keywords: | Mediterranean and Black Seas sea level altimetry tide gauge vertical crustal motion continuous GPS |
本文献已被 SpringerLink 等数据库收录! |
|