Preprints
https://doi.org/10.5194/gmd-2022-228
https://doi.org/10.5194/gmd-2022-228
Submitted as: model evaluation paper
10 Nov 2022
Submitted as: model evaluation paper | 10 Nov 2022
Status: this preprint is currently under review for the journal GMD.

Multidecadal and climatological surface current simulations for the southwestern Indian Ocean at 1/50° resolution

Noam Sebastian Vogt-Vincent and Helen L. Johnson Noam Sebastian Vogt-Vincent and Helen L. Johnson
  • Department of Earth Sciences, South Parks Road, University of Oxford, Oxford, UK

Abstract. The Western Indian Ocean Simulation (WINDS) is a regional configuration of the Coastal and Regional Ocean Community Model (CROCO) for the southwestern Indian Ocean. WINDS has a horizontal resolution of 1/50° (~2 km) and spans a latitudinal range of 23.5° S–0° N, and a longitudinal range from the East African coast to 77.5° E. We ran two experiments using the WINDS confugration: WINDS-M, a full 28-year multidecadal run (1993–2020); and WINDS-C, a 10-year climatological control run with monthly climatological forcing. WINDS was primarily run for buoyant Lagrangian particle tracking applications, and horizontal surface velocities are output at a temporal resolution of 30 minutes. Other surface fields are output daily, and the full 3D temperature, salinity, and velocity fields are output every 5 days. We demonstrate that WINDS successfully manages to reproduce surface temperature, salinity, currents and tides in the southwestern Indian Ocean, and is therefore appropriate for use in regional marine dispersal studies for buoyant particles, or other applications using high-resolution surface ocean properties.

Noam Sebastian Vogt-Vincent and Helen L. Johnson

Status: open (until 05 Jan 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CEC1: 'Comment on gmd-2022-228', Astrid Kerkweg, 28 Nov 2022 reply

Noam Sebastian Vogt-Vincent and Helen L. Johnson

Data sets

WINDS-C Noam Vogt-Vincent, Helen Johnson http://dx.doi.org/10.5285/b2b9bfe408f14ea7a79d9ff7aee0d0b8

WINDS-M Noam Vogt-Vincent, Helen Johnson http://dx.doi.org/10.5285/BF6F0CFBD09E47498572F21081376702

Model code and software

CROCO v1.1 CROCO development team (croco-ocean.org) https://data-croco.ifremer.fr/CODE_ARCHIVE/croco-v1.1.tar.gz

Experiment configuration and data visualisation scripts Noam Vogt-Vincent https://dx.doi.org/10.5281/zenodo.7186244

Video supplement

Supplementary Video 1: One year of SST from WINDS-C Noam Vogt-Vincent https://youtu.be/txwekFS_G5Q

Noam Sebastian Vogt-Vincent and Helen L. Johnson

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Short summary
Networks of ocean currents transport things over large distances across the ocean surface. Predicting this transport is key for tackling many environmental problems, such as marine plastic pollution and coral reef resilience. However, doing this requires a good understanding ocean currents, which is currently lacking. Here, we present state-of-the-art simulations for surface currents in the southwestern Indian Ocean, which will support future marine dispersal studies across this region.