Large Amplitude Solitary Waves Observed During TOGA COARE

TOGA COARE 期间观测到的大振幅孤立波

• 批准号: 9415979
• 负责人: Mark Merrifield
• 金额: $ 5万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9415979&HistoricalAwards=false
• 关键词: Large; Amplitude; Solitary; Waves; Observed

9415979 Merrifield During the TOGA COARE experiment, an extensive set of observations concentrated in the Intensive Flux Array (IFA) documented the unexpected occurrence of large amplitude internal wave trains propagating towards the northwest with a seemingly permanent form. These distinctive features are associated with near-surface current speeds of about 1m/s and downward displacements in the thermocline of approximately 50 meters. Much like solitary waves observed in other locations, these events are closely linked with the semidiurnal tide; this suggests that barotropic tidal flow over island ridge topography in the vicinity of the observation site may contribute to their generation. This project seeks to (1) examine the effects of background conditions, particularly the strong vertical shear associated with the large-scale equatorial current systems, on the solitary wave groups; (2) compare finite-depth wave theory with the observed wave structure, propagation speed, and attenuation; and, (3) investigate the processes that may lead to wave generation.

9415979 Merrifield 在 TOGA COARE 实验期间，集中在密集通量阵列 (IFA) 中的大量观测记录了意外发生的大振幅内波列以看似永久的形式向西北传播。 这些独特的特征与约 1m/s 的近地表水流速度和约 50 米的温跃层向下位移有关。 就像在其他地方观察到的孤立波一样，这些事件与半日潮密切相关。这表明观测地点附近岛脊地形上的正压潮汐流可能有助于其产生。 该项目旨在（1）研究背景条件，特别是与大规模赤道流系统相关的强垂直切变对孤立波群的影响； （2）将有限深度波理论与观测到的波结构、传播速度和衰减进行比较； (3) 研究可能导致波浪产生的过程。