Data assimilation sensitivity experiments in the East Auckland Current system using 4D-Var

Santana, Rafael; Macdonald, Helen; O'Callaghan, Joanne; Powell, Brian; Wakes, Sarah; H. Suanda, Sutara

doi:https://doi.org/10.5194/gmd-16-3675-2023

Articles | Volume 16, issue 13

https://doi.org/10.5194/gmd-16-3675-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-16-3675-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 13

Development and technical paper

|

06 Jul 2023

Development and technical paper |

| 06 Jul 2023

Data assimilation sensitivity experiments in the East Auckland Current system using 4D-Var

Rafael Santana, Helen Macdonald, Joanne O'Callaghan, Brian Powell, Sarah Wakes, and Sutara H. Suanda

Data sets

Across-shelf mooring array from the northeast shelf of New Zealand Joanne O'callaghan, Mike Brewer, and Fiona Elliott https://doi.org/10.17882/78971

Model code and software

East Auckland Current ocean model configuration and analysis files Rafael Santana https://doi.org/10.5281/zenodo.7306271

Short summary

We show the importance of assimilating subsurface temperature and velocity data in a model of the East Auckland Current. Assimilation of velocity increased the representation of large oceanic vortexes. Assimilation of temperature is needed to correctly simulate temperatures around 100 m depth, which is the most difficult region to simulate in ocean models. Our simulations showed improved results in comparison to the US Navy global model and highlight the importance of regional models.