CAJ | 학술논문

通过对东沙群岛附近2009年夏季测到的三个孤立波事件的分析,结合现场的X波段雷达、ADCP和CTD观测,发现内孤立波经过时,伴有突发性强流,最大水平东西分量U大于0.5 m/s,周期大约15 min,各深度层海流均为西向。第三个孤立波事件中,雷达后向散射影像中包含至少4个亮条带,其中最后的条带雷达表面信号最强。而内波表面信号强弱不仅与内波的振幅有关,还可能与潮流、混合层深度等环境条件有关,该研究可加深对内波遥感观测的理解。
통과대동사군도부근2009년하계측도적삼개고립파사건적분석,결합현장적X파단뢰체、ADCP화CTD관측,발현내고립파경과시,반유돌발성강류,최대수평동서분량U대우0.5 m/s,주기대약15 min,각심도층해류균위서향。제삼개고립파사건중,뢰체후향산사영상중포함지소4개량조대,기중최후적조대뢰체표면신호최강。이내파표면신호강약불부여내파적진폭유관,환가능여조류、혼합층심도등배경조건유관,해연구가가심대내파요감관측적리해。
Three internal solitary waves (ISWs) around Dongsha were observed in the summer of 2009. Based on in situ onboard X-band radar, thermistor chains, ADCP and CTD data, we found that during the internal solitary waves passing the vessel, there was a strong abrupt current, with maximum east-west speed (U) of more than 0.5 m/s, and the whole course was about 15 minutes. All the deep ocean currents faced west. During the third insternal solitary waves, there were at least four light stripes in the radar backscatter power images, and the strongest internal wave surface signal lied at the rear of the stripes. Besides the amplitude of ISWs, the background current and mixing layer depth may also have impact on sea surface signal power. This study is very helpful to understanding of ISWs remote sensing and examination.