Vertical Land Motion in the Mediterranean Sea from Altimetry and Tide Gauge Stations

Edited: 2011-02-18
TitleVertical Land Motion in the Mediterranean Sea from Altimetry and Tide Gauge Stations
Publication TypeJournal Article
Year of Publication2004
AuthorsFenoglio-Marc, L., C. Dietz, and E. Groten
JournalMarine Geodesy
Volume27
Issue3
Pagination683
Keywordssea_level, tide_gauge, topex
AbstractWe have computed estimates of the rate of vertical land motion in the Mediterranean Sea from differences of sea level heights measured by the TOPEX/Poseidon radar altimeter and by a set of tide gauge stations. The comparison of data at 16 tide gauges, using both hourly data from local datasets and monthly data from the PSMSL dataset, shows a general agreement, significant differences are found at only one location. Differences of near-simultaneous, monthly and deseasoned monthly sea level height time-series have been considered in order to reduce the error in the estimated linear-term. In a subset of 23 tide gauge stations the mean accuracy of the estimated vertical rates is 2.3 ± 0.8 mm/yr. Results for various stations are in agreement with estimates of vertical land motion from geodetic methods. A comparison with vertical motion estimated by GPS at four locations shows a mean difference of -0.04 ± 1.8 mm/yr, however the length of the GPS time-series and the number of locations are too small to draw general conclusions.
DOI10.1080/01490410490883441