The Life Cycle of Annual Waves in the Indian Ocean as Identified by Seamless Diagnosis of the Energy Flux
The Life Cycle of Annual Waves in the Indian Ocean as Identified by Seamless Diagnosis of the Energy Flux
复制标题
通过能量通量的无缝诊断识别印度洋年度波浪的生命周期
DOI：
10.1029/2019gl085670
复制
发表时间：
2020
影响因子：
5.2
通讯作者：
Aiki Hidenori
中科院分区：
文献类型：
--
作者：
Li Zimeng;Aiki Hidenori
在以前的研究中，由于缺乏适当的诊断技术，在波浪能量转移方面很少研究大尺度波浪在热带-温带相互作用中的作用。使用新的无缝方案，本研究每年确定了印度洋一系列明确的波浪能水平环流路线。其中一个特征代表了每个半球西部边界附近的局部气旋性环流，而另一个特征则表现为东印度洋的盆地规模的气旋性环流。对于第二斜压模式，当纬向速度异常响应季风-风周期而表现出向东和向西的峰值（每年四次）时，就会出现与赤道开尔文波相关的向东能量通量。识别波浪能循环的这些关键路径使我们能够更好地了解热带和亚热带地区的波浪如何在印度洋的地带边界处相互连接。
In previous studies, the role of large‐scale waves in tropical‐extratropical interactions has been little investigated in terms of wave energy transfer owing to the lack of appropriate diagnostic techniques. Using a new seamless scheme, the present study identifies a series of well‐defined horizontal circulation routes of wave energy in the Indian Ocean on an annual basis. One of these features represents a localized cyclonic circulation close to the western boundary in each hemisphere while the other manifests as a basin‐scale cyclonic circulation in the eastern Indian Ocean. For the second baroclinic mode, eastward energy fluxes associated with equatorial Kelvin waves appear when zonal velocity anomaly exhibits eastward and westward peaks (four times per year) in response to the monsoon‐wind cycle. Identification of these key pathways of wave energy circulation enables us to better understand how waves in the tropical and subtropical regions interconnect at the zonal boundaries of the Indian Ocean.