INTERNATIONAL HYDROGRAPHIC REVIEW
MAY 2020
75
-0.3 -0.2 -0.1
0.0
0.1
0.2
m
0.3 0.4 0.5
Figure 5: DTU19MDT (Andersen and Knudsen 2009), a specimen for a geodetic model of the mean dynamic
topography, over the Baltic Sea. It can be considered as a smooth proxy for the height of the recent MSL above the
BSCD2000 height reference surface.
The model was derived by combining multi-mission altimetry over a 20 year period with the latest state-of-the-art global
potential model derived using the GOCE satellite. Consequently, the model is only a proxy for wavelength longer than
100 km. For this plot, the zero level has been shifted approximately from a global geoid to NAP to roughly match the
definition of the BSCD2000.