CAJ | 학술논문

利用高分辨率卫星高度计观测海平面异常(SLA)数据, 结合潮位站观测资料, 研究 2005~2010 年南海海平面异常升高的空间分布特征.结果表明, 南海海平面显著上升, 平均速率为17mm·a–1, 上升速率在空间分布上存在显著差异.速率最大的海域出现在南海中西部, 大于30mm·a–1, 而南海南部海域上升速率则相对较小, 大约为12mm·a–1, 潮位站的观测结果与卫星高度计观测结果一致.1993~2004 年期间南海海平面线性变化主要与海面经向风场变化导致的海面温度变化密切相关; 2005~2010年3次强La Ni?a事件导致南海呈显著的正SLA;此外,受南方涛动、北太平洋的年代际振荡(PDO)等的低频变化影响, 南海中部海盆呈显著的东风异常, 由此在南海中西部海域产生负的风应力旋度, 是该海区海平面显著上升的另一重要因素.
이용고분변솔위성고도계관측해평면이상(SLA)수거, 결합조위참관측자료, 연구 2005~2010 년남해해평면이상승고적공간분포특정.결과표명, 남해해평면현저상승, 평균속솔위17mm·a–1, 상승속솔재공간분포상존재현저차이.속솔최대적해역출현재남해중서부, 대우30mm·a–1, 이남해남부해역상승속솔칙상대교소, 대약위12mm·a–1, 조위참적관측결과여위성고도계관측결과일치.1993~2004 년기간남해해평면선성변화주요여해면경향풍장변화도치적해면온도변화밀절상관; 2005~2010년3차강La Ni?a사건도치남해정현저적정SLA;차외,수남방도동、북태평양적년대제진탕(PDO)등적저빈변화영향, 남해중부해분정현저적동풍이상, 유차재남해중서부해역산생부적풍응력선도, 시해해구해평면현저상승적령일중요인소.
Based on the high spatial resolution satellite observation data of sea level anomalies (SLA) and tide gauge station observations, we studied spatial pattern and mechanism of the anomaly high sea level in the South China Sea (SCS) during 2005~2010. The results showed that the basin mean sea level in the SCS had an increasing rate of about 17 mm·a–1 during 2005~2010 and that the spatial distribution of the increasing rate had significant differences in the SCS. The largest rate appeared in the central-west SCS, with an increasing rate of more than 30 mm·a–1; on the other hand, the increasing rate was relatively small in the southern SCS, at about 12 mm·a–1, consistent with the results using tide gauge station data. During 1993~2004, the sea level trend in the SCS was closely associated with the sea surface temperature anomalies caused by the variability of meridional wind. During 2005~2010, three strong La Ni?a events led to abnormally high sea level in the SCS. In addition, affected by the low-frequency variation of the Southern Oscillation and the North Pacific decadal oscillation (PDO), the wind stress displayed strong easterly wind anomaly in the central-west basin of the SCS, resulting in anomaly negative wind stress curl, which also led to abnormally high sea level in the SCS.