Scholarlink

<p>The quasi-stationary jets, called “J1” and “J2” in the western North Pacific Ocean, transport the warm and salty waters originating from the Kuroshio and form the transition domain (TD) between the subtropical and subarctic features. Although previous studies have revealed the Kuroshio water pathways from the Kuroshio Extension to the western part of the TD through J1, the pathways to the eastern part of the TD (ETD) have not been revealed yet. We use the backward particle-tracking method to evaluate the Kuroshio water pathways from the Kuroshio Extension to the ETD. Our results identify that the Kuroshio Extension Northern Branch is the dominant pathway. The subarctic Front, the main jet of the Kuroshio Extension, and J1 also contribute to the Kuroshio water intrusion with the aid of eddy transports. We also find that the Kuroshio water intrusion affects the decadal sea surface temperature and surface heat flux variations. When the Kuroshio water intrusion is enhanced, the heat transport into the transition domain from the Kuroshio Extension and the heat release to the atmosphere from the transition domain are enhanced. The decadal variation of Kuroshio water intrusion correlates with the J2 strength and not with the Kuroshio Extension latitude. Using the Hilbert Empirical Orthogonal Function, we show that the remote force in the Gulf of Alaska and the central North Pacific Ocean possibly drives the decadal variation of J2 strength. In addition to this remote mechanism, the geostrophic anomalies forced by the local wind stress anomalies are also important.</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

Kuroshio surface water intrusion into the eastern part of the transition domain: its pathways and decadal variations

  • 期刊论文

  • 发表日期：

    2025年5月17日

查看全文
  • Takuro Matsuta,
  • Humio Mitsudera,
  • Toru Miyama,
  • Hiroyuki Tomita

摘要

The quasi-stationary jets, called “J1” and “J2” in the western North Pacific Ocean, transport the warm and salty waters originating from the Kuroshio and form the transition domain (TD) between the subtropical and subarctic features. Although previous studies have revealed the Kuroshio water pathways from the Kuroshio Extension to the western part of the TD through J1, the pathways to the eastern part of the TD (ETD) have not been revealed yet. We use the backward particle-tracking method to evaluate the Kuroshio water pathways from the Kuroshio Extension to the ETD. Our results identify that the Kuroshio Extension Northern Branch is the dominant pathway. The subarctic Front, the main jet of the Kuroshio Extension, and J1 also contribute to the Kuroshio water intrusion with the aid of eddy transports. We also find that the Kuroshio water intrusion affects the decadal sea surface temperature and surface heat flux variations. When the Kuroshio water intrusion is enhanced, the heat transport into the transition domain from the Kuroshio Extension and the heat release to the atmosphere from the transition domain are enhanced. The decadal variation of Kuroshio water intrusion correlates with the J2 strength and not with the Kuroshio Extension latitude. Using the Hilbert Empirical Orthogonal Function, we show that the remote force in the Gulf of Alaska and the central North Pacific Ocean possibly drives the decadal variation of J2 strength. In addition to this remote mechanism, the geostrophic anomalies forced by the local wind stress anomalies are also important.