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Combination of Sea-Level Observations and an Oceanographic Model for Geodetic Applications in the Baltic Sea

  • Kristin Novotny
  • Gunter Liebsch
  • Reinhard Dietrich
  • Andreas Lehmann
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 128)

Abstract

Satellite altimetry and tide gauges provide observations of the instantaneous sea surface. As a further source an oceanographic model of the Baltic Sea also provides sea-level heights. The different sea-surface heights are of comparable precision and complement each other well in terms of their spatial and temporal resolution and their information content.

When the different sea-level information are combined, variations in the time series can be reduced, the quality of the observations can be checked, and phenomena of special interest can be separated.

One application for the combination of observed and modelled heights is the estimation of secular sea-level changes. By reducing a large part of the high frequency sea-level variations in the observations, the trend estimation from short time series can be improved. This is of interest especially for satellite altimeter observations, which, though having a high spatial resolution, cover a rather short time span.

Keywords

Satellite altimetry tide gauge oceanographic model Baltic Sea 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Kristin Novotny
    • 1
  • Gunter Liebsch
    • 1
  • Reinhard Dietrich
    • 1
  • Andreas Lehmann
    • 2
  1. 1.Institut für Planetare GeodisieTU DresdenDresdenGermany
  2. 2.Institute für Meereskunde an der Universität KielKielGermany

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