文献类型：期刊文献

中文题名：琼东上升流和越南沿岸上升流对超强厄尔尼诺事件响应的对比分析

英文题名：Comparison of the Responses of the Qiongdong Upwelling and the Vietnam Coastal Upwelling to Super El Niňo Events

作者：沈煜帆[1,2];经志友[2];谭可易[1];谢玲玲[1]

机构：[1]广东海洋大学广东省近海海洋变化与灾害预警技术重点实验室,广东湛江524088;[2]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,广东广州510301

年份：2019

卷号：37

期号：3

起止页码：374

中文期刊名：海洋科学进展

外文期刊名：Advances in Marine Science

收录：CSTPCD、、北大核心2017、CSCD2019_2020、北大核心、CSCD

基金：国家自然科学基金项目——南海西北陆架垂向环流动力诊断及其季节变化(41776034);热带气旋对琼东上升流动力过程和物质输送的影响机制研究(41476009);南海北部锋面海域的次中尺度动力过程与机制研究(41776040);广东省高等学校优秀青年教师项目——粤西陆架环流的调控机制研究(YQ2015088);热带海洋环境国家重点实验室自主项目——南海次中尺度动力过程与生态响应研究(LTOZZ1701)

语种：中文

中文关键词：沿岸上升流;厄尔尼诺现象;海表温度;海表高度;风应力

外文关键词：coastal upwelling;El Niňo;SST;SSH;wind stress

中文摘要：利用海表温度(SST)、海面高度(SSH)、风场、热通量等数据,比较分析琼东上升流和越南沿岸上升流对1998年和2016年两次超强厄尔尼诺事件的响应。结果发现,两个上升流对同一厄尔尼诺事件的响应以及同一上升流区对两次厄尔尼诺事件的响应均不同。1998年夏季,琼东海域风场异常利于上升流发展,上升流增强,越南沿岸风场异常不利于上升流发展,上升流减弱;2016年夏季,两个上升流区均为利于上升流的风场异常,但琼东沿岸冷水区却大幅缩小,SST明显升高,越南沿岸冷水区变化不大,但总体温度也升高。这表明,除风场外,琼东和越南沿岸上升流还受其他过程影响。海洋动力过程分析发现,同一时间同一上升流区的海表温度异常(SSTA)变化与海面高度异常(SSHA)变化最为一致。1998年夏季,琼东的负SSHA和越南以东的正SSHA均与风场异常作用一致,从而琼东上升流增强,越南沿岸上升流减弱。2016年夏季,琼东和越南以东均为正SSHA,抵消了利于上升流的风场异常,使得琼东和越南沿岸上升流减弱。同一时间不同海区相比,风应力旋度异常对琼东上升流SSTA影响更大,SSHA和沿岸风应力异常则对越南沿岸上升流影响更明显。海面高度异常表征的中尺度涡和风场异常(尤其是沿岸风应力异常和风应力旋度异常)是超强厄尔尼诺后沿岸上升流变化的重要影响因素。

外文摘要：Using the sea surface temperature(SST), sea surface height(SSH), sea surface wind and heat flux data, this study compares the responses of the Qiongdong Upwelling(QDU) and the Vietnam Coastal Upwelling(VCU) to two super El Niňo events in 1998 and 2016. The results show that the responses to the same El Niňo event in the two upwelling regions and the responses to two El Niňo events in the same upwelling region are all different. In the summer of 1998, the upwelling-favorable wind anomaly enhanced the QDU, while the upwelling-unfavorable wind anomaly weakened the VCU. In the summer of 2016, there were upwelling-favorable wind anomalies in both upwelling regions, but the area of cool water in the QDU region shrank even a warm SST anomaly(SSTA) appears, and the cool water in the VCU region did not show much change. This suggests that, in addition to the wind anomaly, other processes also affect the variability of the QDU and the VCU. By analyzing the influence of ocean dynamical processes, we find that the variability of SSTA is mostly consistent with that of SSH anomaly(SSHA) in the same region during the same period. In the summer of 1998, the negative SSHA in the QDU region and the positive SSHA in the VCU region enhanced the effects of the wind anomaly, and thus strengthened the QDU and weakened the VCU. In the summer of 2016, positive SSHA appeared in both the QDU region and the VCU region, counteracted the upwelling-favorable wind anomaly and thus weakened the QDU and the VCU. Comparing the responses in the two upwelling regions, we find that the impact of wind stress curl anomaly(WSCA) is stronger on the QDU than on the VCU, while the influence of SSHA and alongshore wind stress anomaly(AWSA) is larger in the VCU region than the QDU region. The mesoscale eddies represented by the SSHA and the wind anomaly, especially the AWSA and WSCA, are factors that significantly affected coastal upwelling after super El Niňo events.