文献类型：期刊文献

中文题名：南海西北部上层海洋对连续台风的近惯性响应

英文题名：Upper ocean near-inertial response to the passage of two sequential typhoons in the northwestern South China Sea

作者：马永贵[1];张书文[1,2];齐义泉[3];经志友[4]

机构：[1]广东海洋大学海洋与气象学院;[2]青岛海洋科学与技术国家实验室区域海洋动力学与数值模拟功能实验室;[3]河海大学海洋学院;[4]中国科学院南海海洋研究所热带海洋环境国家重点实验室

年份：2019

卷号：49

期号：4

起止页码：731

中文期刊名：中国科学：地球科学

外文期刊名：SCIENCE CHINA-EARTH SCIENCES

收录：SCI-EXPANDED(收录号：WOS:000463715900009)、CSTPCD、、EI(收录号：20190906550173)、北大核心2017、Scopus(收录号：2-s2.0-85061989870)、CSCD2019_2020、WOS、北大核心、CSCD

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 41676008 & 40876005), the National Key Research and Development Program of China (Grant No. 2016YFC14001403), and the National Program on Global Change and Air-Sea Interaction (Grant No. GASI-IPOVI-04).

语种：中文

中文关键词：连续台风;近惯性振荡;近惯性能量传播

外文关键词：Typhoon Nesat; Typhoon Nalgae; Near-inertial waves; Near-inertial kinetic energy; Inertial wave propagation

中文摘要：文章基于2011年9～11月南海西沙潜标观测资料,研究了西沙海域上层海洋对连续台风Nesat(1117)和Nalgae(1119)过境的近惯性响应.结果表明:两个台风过境都产生了强烈的近惯性振荡,且台风路径右侧的近惯性流速明显大于左侧. Nesat引起的近惯性内波平均垂向相速度为0.25cm s^(-1),垂向群速度为0.85m h-1,垂向波长为350m.Nalgae所引起的近惯性内波垂向相速度和群速度均小于Nesat,垂向波长仅为Nesat的1/2.两个台风引起的近惯性能量下传深度存在明显差异, Nalgae约为200m,而Nesat可下传至300m.产生这一差异的主要原因是Nesat引起的近惯性能量不易耗散,同时能够以较快的速度向深海传播.此外,两个台风引起的近惯性内波频率都存在明显的蓝移现象. Nesat引起的近惯性内波频率在100～150m深度受多普勒频移的影响明显增大;然而Nalgae引起的近惯性内波频率却在100～150m深度显著减小,这是由于两个台风过境期间,西沙海域背景场涡度差异所致.

外文摘要：Fifty-seven days of moored current records are examined, focusing on the sequential passage of Typhoons Nesat and Nalgae separated by 5 days in the northwestern South China Sea. Both typhoons generated strong near-inertial waves (NIW) as detected by a moored array, with the near-inertial velocity to the right of the typhoon path significantly larger than to the left. The estimated vertical phase and group velocities of the NIW induced by Typhoon Nesat are 0.2 cm s(-1) and 0.85 m h(-1), respectively, corresponding to a vertical wavelength of 350 m. Both the vertical phase and group velocities of the NIW induced by Typhoon Nalgae are lower than those of Typhoon Nesat, with the corresponding vertical wavelength only one-half that of Nesat. The threshold values of induced near-inertial kinetic energy (NIKE) of 5 J m(-3) reach water depths of 300 and 200 m for Typhoons Nesat and Nalgae, respectively, illustrating that the NIKE induced by Typhoon Nesat dissipated less with depth. Obvious blueshifts in the induced NIW frequencies are also detected. The frequency of NIW induced by Typhoon Nesat significantly increases at water depths of 100-150 m because of Doppler shifting, but decreases significantly at water depths of 100-150 m for Nalgae because of the greater influence of the background vorticity during the passage of Typhoon Nalgae.