Equatorial wave diagnosis for the Atlantic Niño in 2019  with an ocean reanalysis

Song, Qingyang; Aiki, Hidenori

doi:https://doi.org/10.5194/os-19-1705-2023

Articles | Volume 19, issue 6

https://doi.org/10.5194/os-19-1705-2023

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

https://doi.org/10.5194/os-19-1705-2023

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

Articles | Volume 19, issue 6

Research article

|

05 Dec 2023

Research article |

| 05 Dec 2023

Equatorial wave diagnosis for the Atlantic Niño in 2019 with an ocean reanalysis

Qingyang Song and Hidenori Aiki

Data sets

ERA5: Fifth generation of ECMWF atmospheric reanalyses of the global climate Copernicus Climate Change Service http://apdrc.soest.hawaii.edu:80/dods/public_data/Reanalysis_Data/ERA5/monthly_2d/Surface

The eddy-resolving (1/12°) Global Ocean Physics Reanalysis (GLORYS12V1): GLOBAL_MULTIYEAR_PHY_001_030 E.U. Copernicus Marine Service Information https://data.marine.copernicus.eu/product/GLOBAL_MULTIYEAR_PHY_001_030/services

NOAA Optimum Interpolation 1/4 Degree Daily Sea Surface Temperature (OISST) Analysis W. Reynolds Richard, F. Banzon Viva, and NOAA CDR Program https://doi.org/10.7289/V5SQ8XB5

Short summary

There has been a long-standing need for a rapid-detection method for waves using simulation data for Atlantic Niño events. This study addresses this by utilizing an ocean reanalysis and an energy flux scheme during the 2019 Niño event. The results confirm the significant influence of subseasonal Kelvin waves on the event and also suggest that wave energy from off-equatorial regions likely preconditioned the event. This study is thus a useful tool for warning systems for Atlantic Niño events.