An assessment of equatorial Atlantic interannual variability in Ocean Model Intercomparison Project (OMIP) simulations

Prigent, Arthur; Farneti, Riccardo

doi:https://doi.org/10.5194/os-20-1067-2024

Articles | Volume 20, issue 4

https://doi.org/10.5194/os-20-1067-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/os-20-1067-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 4

Research article

|

30 Aug 2024

Research article |

| 30 Aug 2024

An assessment of equatorial Atlantic interannual variability in Ocean Model Intercomparison Project (OMIP) simulations

Arthur Prigent and Riccardo Farneti

Supplement

https://doi.org/10.5194/os-20-1067-2024-supplement

Data sets

Output files for MOM5 driven by JRA55-do at 1-degree and 0.25-degree horizontal resolution R. Farneti https://doi.org/10.5281/zenodo.11047949

ORA-S5 European Centre for Medium-Range Weather Forecasts https://cds.climate.copernicus.eu/cdsapp\#!/dataset/reanalysis-oras5?tab=form

OI-SST National Oceanic and Atmospheric Administration https://psl.noaa.gov/data/gridded/data.noaa.oisst.v2.html

CCMP v2 Remote Sensing Systems https://apdrc.soest.hawaii.edu/erddap/griddap/hawaii_soest_3387_f2e3_e359.html

AVISO SLA Copernicus Climate change https://cds.climate.copernicus.eu/cdsapp\#!/dataset/10.24381/cds.4c328c78?tab=overview

The OMIP1 and OMIP2 model outputs Earth System grid Federation https://esgf-data.dkrz.de/projects/esgf-dkrz/

CORE-II Geophysical Fluid Dynamics Laboratory https://data1.gfdl.noaa.gov/nomads/forms/core/COREv2.html

JRA55-do Japan Meteorological Agency https://climate.mri-jma.go.jp/pub/ocean/JRA55-do/

Model code and software

The Modular Ocean Model aekiss https://github.com/mom-ocean/MOM5

Short summary

We evaluate the eastern equatorial Atlantic's (EEA's) seasonal cycle and interannual variability in the Ocean Model Intercomparison Project Phases 1 and 2 (OMIP1 and OMIP2) for 1985–2004. While both simulate EEA patterns, biases like a diffusive thermocline and insufficient cooling exist during the development of the Atlantic cold tongue. OMIP1 exhibits 51% (33%) larger interannual sea surface temperature (sea surface height) variability than OMIP2, attributed to differences in wind forcing.