La Niña May Bring a Colder, Drier Winter to China – What It Means for Hainan
As parts of China shivered through a cooler-than-usual autumn, many are wondering: will this winter be colder than normal?
According to Zhang Daquan, Deputy Director of the Climate Prediction Office at China’s National Climate Center, the answer depends largely on the Pacific.
Sea surface temperatures across much of the central and eastern equatorial Pacific are currently below average, a pattern associated with a developing La Niña event. If this trend continues, and experts expect it will, La Niña conditions are likely to be in place by late autumn and persist through the winter of 2025–2026.
What is La Niña, and Why Does It Matter?
La Niña is a climate pattern marked by the large-scale cooling of ocean surface temperatures in the central and eastern Pacific near the equator. This cooling shifts atmospheric circulation patterns and can significantly influence global weather.
For China, La Niña winters often bring:
Colder-than-normal temperatures, especially in northern and inland regions.
Increased risk of snowstorms and ice disasters in both the north and the south.
Drier conditions, particularly across southern China, including areas south of the Yangtze River.
This shift occurs because La Niña weakens the warm, moist airflow from the northwestern Pacific toward southern China. The result: less precipitation and longer dry spells.
What the Data Shows
Historically, La Niña winters have a strong track record of colder conditions in China, especially prior to the 1990s. Severe winters such as those in 2008 and 2018 were both La Niña years and brought widespread snow and freezing rain events.
However, recent decades have seen some variability. Due to global climate change, not all La Niña winters have been cold. In fact, 2020, 2022, and 2023 all featured La Niña events but turned out to be unusually warm, 2020 even registered as a “warm winter” across many parts of China.
What About Hainan?
While Hainan is far from China’s snow zones, La Niña still matters. The island typically doesn’t face harsh winters, but it could see longer dry periods and reduced rainfall, especially in the late dry season and early spring. For agriculture, tourism, and water management, this shift in moisture patterns could be significant.
More detailed forecasts for the 2025–2026 winter are expected at the end of October, when the National Climate Center releases its seasonal climate outlook.
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