Scholarlink

<p>The boreal winter-peaked Atlantic Niño/Niña can influence La Niña/El Niño (the cold/warm phase of El Niño-Southern Oscillation, ENSO) in the following year. However, the Atlantic Niño-La Niña relationship is more uncertain than the Atlantic Niña-El Niño counterpart. Here, we show that this uncertainty arises from two distinct types of Atlantic Niño events: the Equatorial and Expanded types, which differ in their meridional sea surface temperature (SST) warming. The Equatorial type, with SST warming confined to the equator, has a weaker climate impact due to limited influence on local convective heating in spring when the intertropical convergence zone (ITCZ) shifts southward. In contrast, the Expanded type, with SST warming extending into the southern tropical Atlantic (STA), drive persistent local anomalous convection heating and strong remote atmospheric responses in the tropical Pacific from winter to spring. Our results emphasize the critical role of STA conditions in shaping the influence of winter Atlantic Niño on the Pacific.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Unveiling the role of South Tropical Atlantic in winter Atlantic Niño inducing La Niña

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年2月13日

查看全文
  • Guangli Zhang,
  • Jiepeng Chen,
  • Hanjie Fan,
  • Lei Zhang,
  • Mengyan Chen,
  • Xin Wang,
  • Dongxiao Wang

摘要

The boreal winter-peaked Atlantic Niño/Niña can influence La Niña/El Niño (the cold/warm phase of El Niño-Southern Oscillation, ENSO) in the following year. However, the Atlantic Niño-La Niña relationship is more uncertain than the Atlantic Niña-El Niño counterpart. Here, we show that this uncertainty arises from two distinct types of Atlantic Niño events: the Equatorial and Expanded types, which differ in their meridional sea surface temperature (SST) warming. The Equatorial type, with SST warming confined to the equator, has a weaker climate impact due to limited influence on local convective heating in spring when the intertropical convergence zone (ITCZ) shifts southward. In contrast, the Expanded type, with SST warming extending into the southern tropical Atlantic (STA), drive persistent local anomalous convection heating and strong remote atmospheric responses in the tropical Pacific from winter to spring. Our results emphasize the critical role of STA conditions in shaping the influence of winter Atlantic Niño on the Pacific.