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Published in:
2010 | OriginalPaper | Chapter
Sea Level Rise in North Atlantic Derived from Gap Filled Tide Gauge Stations of the PSMSL Data Set
Authors : Heiko Reinhardt, Dimitry Sidorenko, Manfred Wenzel, Jens Schröter
Published in: System Earth via Geodetic-Geophysical Space Techniques
Publisher: Springer Berlin Heidelberg
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Abstract
A reconstruction of the sea level rise in the North Atlantic from the tide gauge station data is presented. As the time series contain numerous gaps these were first filled by applying the Multi-Channel-Singular-Signal-Analysis (MSSA). The method is based on spatial and temporal covariances. For reconstruction we observed the time span from 1950 to 2006 to receive consistent time series for that period. The station data are then interpolated to the full North Atlantic Ocean. To achieve this, a sequence of sea level analysis performed by the Inverse Finite Element Ocean model (IFEOM) was calibrated against the reconstructed gauges. We present the trend estimate for the period from 1950 to 1994. The results show 1.18 mm/year sea level rise for this period. About 27% are explained by steric expansion of the ocean while the remaining 73% are due to inflow of water from land or surrounding oceans.