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An Ocean Modelling and Assimilation Guide to Using Goce Geoid Products : Volume 7, Issue 1 (23/02/2011)

By Haines, K.

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Book Id: WPLBN0004020499
Format Type: PDF Article :
File Size: Pages 14
Reproduction Date: 2015

Title: An Ocean Modelling and Assimilation Guide to Using Goce Geoid Products : Volume 7, Issue 1 (23/02/2011)  
Author: Haines, K.
Volume: Vol. 7, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Lea, D., Knudsen, P., Johannessen, J. A., Davidson, F., Bertino, L., Haines, K.,...Hernandez, F. (2011). An Ocean Modelling and Assimilation Guide to Using Goce Geoid Products : Volume 7, Issue 1 (23/02/2011). Retrieved from

Description: Environmental Systems Science Centre, Harry Pitt Bld, 3 Earley Gate, Reading University, Reading RG6 6AL, UK. We review the procedures and challenges that must be considered when using geoid data derived from the Gravity and steady-state Ocean Circulation Explorer (GOCE) mission in order to constrain the circulation and water mass representation in an ocean general circulation model. It covers the combination of the geoid information with time-mean sea level information derived from satellite altimeter data, to construct a mean dynamic topography (MDT), and considers how this complements the time-varying sea level anomaly, also available from the satellite altimeter. We particularly consider the compatibility of these different fields in their spatial scale content, their temporal representation, and in their error covariances. These considerations are very important when the resulting data are to be used to estimate ocean circulation and its corresponding errors.

We describe the further steps needed for assimilating the resulting dynamic topography information into an ocean circulation model using three different operational forecasting and data assimilation systems. We look at methods used for assimilating altimeter anomaly data in the absence of a suitable geoid, and then discuss different approaches which have been tried for assimilating the additional geoid information. We review the problems that have been encountered and the lessons learned in order the help future users. Finally we present some results from the use of GRACE geoid information in the operational oceanography community and discuss the future potential gains that may be obtained from a new GOCE geoid.

An ocean modelling and assimilation guide to using GOCE geoid products

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