Articles | Volume 14, issue 5
Ocean Sci., 14, 947–957, 2018
https://doi.org/10.5194/os-14-947-2018
Ocean Sci., 14, 947–957, 2018
https://doi.org/10.5194/os-14-947-2018

Technical note 04 Sep 2018

Technical note | 04 Sep 2018

Technical note: Two types of absolute dynamic ocean topography

Peter C. Chu

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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, https://doi.org/10.13189/ujg.2018.060201, 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. 
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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.