CAJ | 학술논문

根据2014年9月1~9日现场观测温度、盐度、深度(CTD)资料和法国卫星中心(AVISO)提供的海表面高度异常(SLA)资料,调查南海西部冷涡和东向急流的三维结构。结果表明,该冷涡于8月3日开始出现,9月29日消亡,持续大约2个月。现场观测期间,冷涡水平尺度约为150km,其形态受其东南边缘的东向急流影响呈长轴为西南—东北向椭圆状,冷涡的垂直尺度为自海表面到200m深度。强的表层地转流(最大值达到1.0m×s-1)出现在靠近东向急流区的冷涡东南侧。航次观测期间东向急流的纬向范围是在109°E至113°E之间,最大地转流流速达到1.2m×s-1,流向基本呈偏东北向,且流幅约为100km；东向急流的垂直尺度可达到150m深度。现场观测期及其前后的SLA和海表面地转流分布表明,东向急流和北侧的冷涡的形态季节内演变过程可能受到南海海盆尺度风应力影响。
근거2014년9월1~9일현장관측온도、염도、심도(CTD)자료화법국위성중심(AVISO)제공적해표면고도이상(SLA)자료,조사남해서부랭와화동향급류적삼유결구。결과표명,해랭와우8월3일개시출현,9월29일소망,지속대약2개월。현장관측기간,랭와수평척도약위150km,기형태수기동남변연적동향급류영향정장축위서남—동북향타원상,랭와적수직척도위자해표면도200m심도。강적표층지전류(최대치체도1.0m×s-1)출현재고근동향급류구적랭와동남측。항차관측기간동향급류적위향범위시재109°E지113°E지간,최대지전류류속체도1.2m×s-1,류향기본정편동북향,차류폭약위100km；동향급류적수직척도가체도150m심도。현장관측기급기전후적SLA화해표면지전류분포표명,동향급류화북측적랭와적형태계절내연변과정가능수도남해해분척도풍응력영향。
By using in situ hydrographic measurements from a cruise during September 1~9, 2014 and real-time sea level anomaly (SLA) data provided by archiving validation and interpretaiton of satellite oceanographic data (AVISO), we survey three-dimensional structure of a cold eddy and eastward jet in the western South China Sea. The results indicate that the cold eddy began to appear on August 3 and disappeared on September 29, lasted for about two months. During the in situ observation, the horizontal scale of the cold eddy was about 150 km and its shape was an ellipse with the long axis located along the southwest-to-northeast direction, which was affected by an eastward jet on the southeast side of the cold eddy. And the cold eddy extended downward for more than 200 m with a vertically tilted central axis. Strong surface geostrophic flow (maximum value reaching 1.0 m×s-1) emerged on the southeastern area of the cold eddy, which was closest to the area of eastward jet. However, during the survey, the zonal range of the eastward jet was between 109°E and 113°E, its maximum geostrophic flow velocity reached 1.2 m×s-1 and it flowed in a northeast direction. The width of the eastward jet was approximately 100 km and the vertical structure of the eastward jet extended 150 m. The evolution of the SLA and the surface geostrophic currents during August and September showed that the development of the eastward jet and the northern cold eddy may be influenced by basin-scale wind stress in the South China Sea.