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Summary: Tropical Pacific remains neutral; ocean warms.
Climate patterns across the equatorial Pacific now display few La Niña signals, with almost all indicators currently well within their neutral range. Both the equatorial Pacific Ocean surface and sub-surface has warmed through southern autumn, resulting in ocean surface temperatures now being near normal across most of the tropical Pacific. The stronger than normal easterly trade winds that had prevailed during the spring and summer have generally eased through March and April. Simultaneously, a sharp drop in the SOI has been observed, falling from +15 in February to zero in March. The SOI remains in the neutral range with a current 30-day value of +5 on the 13 April.
大部份ENSO指標都回復正常
Most international coupled climate models predict further warming of Pacific Ocean sea surface temperature (SST) until at least mid-winter, with SSTs remaining in the ENSO-neutral range. A small number of models are predicting the development of El Niño conditions during the southern winter or spring, while none are suggesting a return to La Niña conditions. The southern autumn is the "predictability barrier"¸ for model predictions, with skill levels at their minimum. However as March-June is the preferred El Niño genesis period, Pacific conditions and model predictions will be monitored closely for any indications of an event.
目前大部份模式預測太平洋SST在北平球盛夏之前會進一步回暖,但仍在正常水平.. |
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