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Most climate forecast agencies failed to make successful predictions of the strong 2020/2021 La Niña event before May 2020. The western equatorial Pacific warm water volume (WWV) before the 2020 spring failed to predict this La Niña event because of the near neutral state of the equatorial Pacific Ocean in the year before. A strong Indian Ocean Dipole (IOD) event took place in the fall of 2019, which is used as a precursor for the La Niña prediction in this study. We used observational data to construct the precursory relationship between negative sea level anomalies (SLA) in the southeastern tropical Indian Ocean (SETIO) in boreal fall and negative Niño 3.4 sea surface temperature anomalies index one year later. The application of the above relation to the prediction of the 2020/2021 La Niña was a great success. The dynamics behind are the Indo-Pacific "oceanic channel" connection via the Indian Ocean Kelvin wave propagation through the Indonesian seas, with the atmospheric bridge playing a secondary role. The high predictability of La Niña across the spring barrier if a positive IOD should occur in the previous year suggests that the negative SETIO SLA in fall is a much better and longer predictor for this type of La Niña prediction than the WWV. In comparison, positive SETIO SLA lead either El Niño or La Niña by one year, suggesting uncertainty of El Niño predictions.

University of Hawaii at Manoa's Philip THOMPSON of the Sea Level Center examined 25 years of interactions between the atmosphere and the ocean surface.

University of Hawaii at Manoa's Philip THOMPSON of the Sea Level Center examined 25 years of interactions between the atmosphere and the ocean surface.

Pakistan's coastal villagers retreat as seas gobble land.

Alerte au tsunami après un séisme de magnitude 8,6 au large de l'Indonésie.

African countries aren't doing enough to prepare for rising sea levels.

Expanding 'dead zone' in Arabian Sea raises climate change fears.

Ces îles menacées de submersion par le réchauffement climatique.

Ancient Aboriginal stories preserve history of a rise in sea level.

On the climate change frontline: the disappearing fishing villages of Bangladesh #GlobalWarning.

A new study published in the international journal Nature Communications has revealed how Western Australia's coral reefs have been affected by changing ocean currents, rising sea surface temperatures and sea level variability.

New Walls Aim to Hold Back Rising Seas off Tanzania.

What is a storm surge and why is it so dangerous?

In Madagascar, fishermen plant mangroves for the future.

Lost Civilization May Have Existed Beneath the Persian Gulf.

No climate breakthrough in Durban: Maldives.