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Ocean Surface Topography from Space
SCIENCE
Regional sea level determination and ocean tides (retracking)


Author(s):

Ole Andersen (Technical University of Denmark - Geodetic Department)

Co-Investigator(s):
  Per Knudsen
Lars Stenseng
Yongcun Cheng
Xiaoli Deng
(Technical University of Denmark - Geodetic Department)
(Technical University of Denmark - Geodetic Department)
(Technical University of Denmark - Geodetic Department)
(University of Newcastle)


Abstract:


Image for Regional sea level determination and ocean tides (retracking)
The figure illustrates the standard deviation over sea level over the last 20 years of from available satellite altimetry (edited) after the standard range and geophysical corrections have been applied. The color scale ranges up to 25 cm. The figure illustrates the problems of using satellite altimetry in the Arctic Ocean. Large outliers as well as errors in the range and geophysical models increase the standard deviation in this region and hampers the ability to isolate oceanographic signal.
The overall aim of this research study is threefold.

  • Improving the climate data record focusing on sea level variations at high latitudes using multiple satellites like T/P, Jason-1, Jason-2, ERS-1, ERS-2, Envisat, ICESat, Cryosat-2 and bridging into Sentinel-3 and Jason-3.

  • Improving altimetric data through retracking. Both for the Arctic Ocean, but also for coastal ocean.

  • Determining improved ocean tide model exploring particularly the long timeseries and new inter-leaved tracks from T/P-Jason-1 and Jason-2



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