Estimates of vertical land motion along the southwestern coasts of Turkey from coastal altimetry and tide gauge data

Hasan Yildiz, Ole Baltazar Andersen, Mehmet Simav, Bahadir Aktug, Soner Ozdemir

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

The differences between coastal altimetry and sea level time series of tide gauges in between March 1993 and December 2009 are used to estimate the rates of vertical land motion at three tide gauge locations along the southwestern coasts of Turkey. The CTOH/LEGOS along-track coastal altimetry retrieves altimetric sea level anomalies closer to the coast than the standard along-track altimetry products. However, the use of altimetry very close to the coast is not found to improve the results. On the contrary, the gridded and interpolated AVISO merged product exhibits the best agreement with tide gauge data as it provides the smoothest variability both in space and time compared with along track altimetry data. The Antalya gauge to the south (in the Mediterranean Sea) and the Mentes/Izmir gauge to the west (in the Aegean Sea) both show subsidence while the Bodrum tide gauge to the south (in the Aegean Sea) shows no significant vertical land motion. The results are compared and assessed with three independent geophysical vertical land motion estimates like from GPS. The GIA effect in the region is negligible. The VLM estimates from altimetry and tide gauge data are in good agreement both with GPS derived vertical velocity estimates and those inferred from geological and archaeological investigations.
Original languageEnglish
JournalAdvances in Space Research
Volume51
Issue number8
Pages (from-to)1572-1580
ISSN0273-1177
DOIs
Publication statusPublished - 2013
EventSatellite Altimetry Calibration and Deformation Monitoring using GNSS - Chania, Crete, Greece
Duration: 20 Jan 201321 Jan 2013

Conference

ConferenceSatellite Altimetry Calibration and Deformation Monitoring using GNSS
CountryGreece
CityChania, Crete
Period20/01/201321/01/2013

Keywords

  • Vertical land motion
  • Coastal altimetry
  • Standard altimetry
  • Tide gauge
  • GPS
  • Southwestern coasts of Turkey

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