在1993-2021年期间,Kuroshio延伸的向北转移
Yuma Kawakami1, Hideyuki Nakano2, L Shogo Urakawa2
1Department of Atmosphere, Ocean, and Earth System Modeling Research, Meteorological Research Institute, Tsukuba, Ibaraki, Japan. y-kawakami@mri-jma.go.jp.
Scientific reports
|September 27, 2023
概括
在1993年至2021年期间,Kuroshio延伸 (KE) 向北移动了210公里. 这种海洋电流的运动主要是由北太平洋风力应力曲线的变化驱动的.
科学领域:
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
- 地质物理学 地质物理学
背景情况:
- 库罗西奥延伸 (KE) 是北太平洋的一个重要电流,影响海面温度 (SST) 和海面高度 (SSH).
- 最近的研究表明,主要的海洋旋转中极向转移,但对KE的南极运动缺乏详细分析.
研究的目的:
- 为了调查库罗西奥延伸 (KE) 的长期南部运动.
- 了解在西北太平洋观察到的KE路径变化背后的驱动机制.
主要方法:
- 利用卫星衍生的SSH和表面电流速度数据.
- 应用了前部识别方法来确定KE路径.
- 分析了大气再分析数据,并使用高分辨率的海洋一般循环模型进行了数值实验.
主要成果:
- 从1993年到2021年,确定了KE的北向迁移,大约为210公里,从1993年到2021年.
- 确定北向KE转移的主要原因是北太平洋上风应力曲线的趋势.
结论:
- 在过去的三十年中,库罗西奥延伸 (KE) 呈现出显著的北向转移.
- 风应力曲线的变化是KE观测到的极向运动的主要驱动因素.
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