Accessibility navigation

Balanced Ocean-Data Assimilation near the Equator

Burgers, G., Balmaseda, M. A., Vossepoel, F. C., van Oldenborgh, G. J. and Van Leeuwen, P. J. (2002) Balanced Ocean-Data Assimilation near the Equator. Journal of Physical Oceanography, 32 (9). pp. 2509-2519. ISSN 0022-3670

[img] Text - Published Version
· Restricted to Repository staff only
· The Copyright of this document has not been checked yet. This may affect its availability.


It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1175/1520-0485-32.9.2509


The question is addressed whether using unbalanced updates in ocean-data assimilation schemes for seasonal forecasting systems can result in a relatively poor simulation of zonal currents. An assimilation scheme, where temperature observations are used for updating only the density field, is compared to a scheme where updates of density field and zonal velocities are related by geostrophic balance. This is done for an equatorial linear shallow-water model. It is found that equatorial zonal velocities can be detoriated if velocity is not updated in the assimilation procedure. Adding balanced updates to the zonal velocity is shown to be a simple remedy for the shallow-water model. Next, optimal interpolation (OI) schemes with balanced updates of the zonal velocity are implemented in two ocean general circulation models. First tests indicate a beneficial impact on equatorial upper-ocean zonal currents.

Item Type:Article
Divisions:No Reading authors. Back catalogue items
ID Code:49815

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation