Mozambique: WMO declares La Nina event for second year running – AIM

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Mozambique: WMO declares La Nina event for second year running – AIM
Mozambique: WMO declares La Nina event for second year running – AIM

Africa-Press – Mozambique. The United Nations’ World Meteorological Organisation (WMO) has declared that a La Nina weather phenomenon has developed for the second year in succession, albeit that it is likely to be a weak to moderate event.

La Nina is the opposite of the better-known El Nino phenomenon. El Nino refers to higher than usual surface water temperatures in the eastern central Pacific, whereas in a La Nina period, the surface water temperature in the Pacific drops by three degrees or more. Both events can have a major impact on rainfall patterns and in the past La Nina has been associated with an increased number of cyclones and excessive rain in the south and centre of Mozambique.

Probabilistic forecasts of precipitation for the season for December – February 2021-2022. The baseline period is 1993– 2009. Figure is generated by The WMO Lead Centre for Long-Range Forecast Multi-Model Ensemble. [Source: WMO]As a result, according to the US-funded Famine Early Warning Systems Network (FEWS NET), “there is an increased likelihood of an above-average number of cyclone strikes in Mozambique”.

The World Meteorological Organisation pointed out that despite the cooling impact of the previous La Nina, 2021 will be “one of the ten warmest years on record, rather than THE warmest year”. According to its Secretary-General, Professor Petteri Taalas, “this is a short-lived respite and does not reverse the long-term warming trend or reduce the urgency of climate action”.

The big temperature divide

As we start the meteorological winter/summer, vast regions of the world are unusually warm or cold

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