Dynamic features of near-inertial oscillations in the Northwestern Pacific derived from mooring observations from 2015 to 2018
Dynamic features of near-inertial oscillations in the Northwestern Pacific derived from mooring observations from 2015 to 2018
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2015-2018年系泊观测西北太平洋近惯性振荡动力学特征
DOI：
10.1007/s00343-020-9332-1
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发表时间：
2020
影响因子：
1.6
通讯作者：
Hu Dunxin
中科院分区：
文献类型：
--
作者：
Hu Shijian;Liu Lingling;Guan Cong;Zhang Linlin;Wang Jianing;Wang Qingye;Ma Jie;Wang Fujun;Jia Fan;Feng Junqiao;Lu Xi;Wang Fan;Hu Dunxin
近惯性振荡是将表面风能转移到深海的重要物理过程。 2015 年 9 月至 2018 年 1 月，我们使用声多普勒电流剖面仪测量部署在热带西太平洋沿 130°E、8.5°N、11°N、12.6°N、15°N 和 17.5°N 的系泊阵列，研究了近惯性动能 (NIKE) 变异性。空间特征、衰减时间尺度和显着的季节性变化。 观察到的NIKE进行了描述。在17.5°N、15°N和12.6°N的系泊点，NIKE波峰出现在北方秋季，NIKE波谷出现在北方春季。相比之下，NIKE 在 11°N 和 8.5°N 处的峰值出现在冬季，波谷出现在夏季。热带气旋和强风事件在高NIKE事件的出现中发挥了重要作用，并解释了观测到的NIKE的季节性和纬度特征。
Near-inertial oscillation is an important physical process transferring surface wind energy into deep ocean. We investigated the near-inertial kinetic energy (NIKE) variability using acoustic Doppler current profiler measurements from a mooring array deployed in the tropical western Pacific Ocean along 130°E at 8.5°N, 11°N, 12.6°N, 15°N, and 17.5°N from September 2015 to January 2018. Spatial features, decay timescales, and significant seasonal variability of the observed NIKE were described. At the mooring sites of 17.5°N, 15°N, and 12.6°N, the NIKE peaks occurred in boreal autumn and the NIKE troughs were observed in boreal spring. By contrast, the NIKE at 11°N and 8.5°N showed peaks in winter and troughs in summer. Tropical cyclones and strong wind events played an important role in the emergence of high-NIKE events and explained the seasonality and latitudinal characteristics of the observed NIKE.