Articles | Volume 14, issue 5
Ocean Sci., 14, 947–957, 2018
Ocean Sci., 14, 947–957, 2018

Technical note 04 Sep 2018

Technical note | 04 Sep 2018

Technical note: Two types of absolute dynamic ocean topography

Peter C. Chu

Related authors

Technical Note: Volume Transport Equations in Combined Sverdrup-Stommel-Munk Dynamics without Level of no Motion
Peter C. Chu
Ocean Sci. Discuss.,,, 2016
Preprint withdrawn
Short summary

Related subject area

Depth range: Surface | Approach: Analytic Theory | Geographical range: All Geographic Regions | Phenomena: Current Field
The Ekman spiral for piecewise-uniform viscosity
David G. Dritschel, Nathan Paldor, and Adrian Constantin
Ocean Sci., 16, 1089–1093,,, 2020
Short summary
Single super-vortex as a proxy for ocean surface flow fields
Imre M. Jánosi, Miklós Vincze, Gábor Tóth, and Jason A. C. Gallas
Ocean Sci., 15, 941–949,,, 2019
Short summary

Cited articles

Bingham, R. J., Haines, K., and Hughes, C. W.: Calculating the ocean's mean dynamic topography from a mean sea surface and a geoid, J. Atmos. Ocean. Technol., 25, 1808–1822, 2008. 
Chu, P. C.: P-vector method for determining absolute velocity from hydrographic data, Mar. Tech. Soc. J., 29, 3–14, 1995. 
Chu, P. C.: Determination of dynamic ocean topography using the minimum energy state, Univ. J. Geosci., 6, 25–39,, 2018. 
Chu, P. C. and Li, R. F.: South China Sea isopycnal surface circulations, J. Phys. Oceanogr., 30, 2419–2438, 2000. 
Chu, P. C., Fan, C. W., Lozano, C. J., and Kerling, J.: An AXBT survey of the South China Sea, J. Geophy. Res., 103, 21637–21652, 1998. 
Short summary
Two types of marine geoid exist with the first type being the average level of sea surface height if the water is at rest (classical definition), and the second type being satellite-determined with the condition that the water is usually not at rest. The associated absolute dynamic ocean topography (DOT) also has two types. Horizontal gradients of the two DOTs are different with the 1st (2nd) type representing the absolute (relative) surface geostrophic currents.