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    WMO Update predicts 60 per cent chance of La Niña

    EnvironmentClimate changeWMO Update predicts 60 per cent chance of La...
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    WMO Update predicts 60 per cent chance of La Niña

    Naturally occurring climate events such as La Nina and El Nino events are taking place in the broader context of human-induced climate change, which is increasing global temperatures, exacerbating extreme weather and climate, and impacting seasonal rainfall and temperature patterns.

    There is a 60 per cent chance of La Niña conditions emerging towards the end of this year, according to a new Update from the World Meteorological Organization (WMO).

    Latest forecasts from WMO Global Producing Centres of Long-Range Forecasts indicate a 55 per cent likelihood of a transition from the current neutral conditions (neither El Niño nor La Niña) to La Nina conditions during September-November 2024. This likelihood increases to 60% from October 2024 to February 2025, with the chance of El Niño redeveloping during this time being negligible.

    La Niña refers to the large-scale cooling of the ocean surface temperatures in the central and eastern equatorial Pacific Ocean, coupled with changes in the tropical atmospheric circulation, such as winds, pressure and rainfall. The effects of each La Niña event vary depending on its intensity, duration, time of year it develops, and the interaction with other climate drivers. Generally, La Niña produces the opposite climate impacts to El Niño, especially in tropical regions. 

    Climate change

    However, naturally occurring climate events such as La Nina and El Nino events are taking place in the broader context of human-induced climate change, which is increasing global temperatures, exacerbating extreme weather and climate, and impacting seasonal rainfall and temperature patterns.

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    WMO Secretary-General Celeste Saulo highlights that “Since June 2023 we have seen an extended streak of exceptional global land and sea surface temperature. Even if a short-term cooling La Niña event does emerge, it will not change the long-term trajectory of rising global temperatures due to heat-trapping greenhouse gases in the atmosphere.” 

    The past nine years have been the warmest on record even with the cooling influence of a multi-year La Niña from 2020 to early 2023. The 2023-24 El Niño event started emerging in June 2023 and peaked in November 2023 – January 2024 as one of the five strongest on record before dissipating – although some impacts continued. 

    “For the past three months, neutral conditions have prevailed – neither El Niño nor La Niña. But we have still seen widespread extreme weather conditions, including intense heat and devastating rainfall. This is why the Early Warnings for All initiative remains WMO’s top priority. Seasonal forecasts for El Niño and La Niña and the associated impacts on the climate patterns globally are an important tool to inform early warnings and early action,” said Celeste Saulo.

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