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MARI/CCPO Seminar Series
Global/Regional Multi-Time Scales of Sea Level Variations in Satellite Altimetry Era
Yongcun Cheng, Old Dominion University, Norfolk
Satellite altimetric data have been widely used for monitoring global/regional sea level changes. I will present an overview of my efforts in investigating sea level variations using satellite altimetric data. In order to study the residual sea level on multi-time scales, the ocean tide signal, which occupies more than 70% of the total sea level variations, has to be removed from the satellite altimetry-measured sea surface height. I developed a global ocean tide model with tide estimation improved in coastal regions and high latitudes. Furthermore, I will present the capability of satellite altimetric data in capturing storm surges in coastalregions. Especially, the global annual sea level cycle variations are investigated based on satellite altimetric data, tide gauge data and Ocean General Circulation Models outputs. The results estimated from the new reprocessed satellite altimetric data in the Arctic Ocean are also presented.