Numerical Study on the Coastal Upwelling and Its Seasonal Variation in the East China Sea
Numerical Study on the Coastal Upwelling and Its Seasonal Variation in the East China Sea
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DOI：
10.2112/jcr-si50-106.1
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发表时间：
2024-03
影响因子：
--
通讯作者：
Z. Jing;Z. Hua;Yq Qi;Xh Cheng
中科院分区：
文献类型：
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作者：
Z. Jing;Z. Hua;Yq Qi;Xh Cheng
摘要景志勇，华志玲，齐永庆，郑晓华，2007。低能量海滩上的海岸过程。《海岸研究杂志》，SI50(第九届国际海岸研讨会论文集)，555-563。利用QUIKSCAT风强迫的三维斜压非线性数值模式，研究了0749.0208-2004年中国东海浙江、福建沿岸的上升流结构及其季节变化，其中考虑了实际地形、边界流(台湾暖流、黑潮和长江流量)和热通量等重要因素。数值模式结果表明，浙江、福建沿海各季节均存在明显的上升流，其强度和空间分布具有明显的季节变异性。较强的上升流中心主要位于浙江沿海的舟山群岛和玉山群岛附近，福建沿海的海坛岛和妈祖群岛附近。冬季平均上升流速度约为0.3×10-3 cm/S，上升流强度约为10-3 cm/S，夏季分别约为0.3×10-2 cm/S和10-2 cm/S。模拟结果还表明，冬季上升流强度变化率较小，沿海上升流强度变化较弱，夏季则相反。
ABSTRACT Jing, Z. Y., Hua, Z. L., Qi, Y. Q. and Cheng, X. H., 2007. Coastal processes on a low energy beach. Journal of Coastal Research, SI 50 (Proceedings of the 9th International Coastal Symposium), 555 – 563. Gold Coast, Australia, ISSN 0749.0208 The upwelling structure and its seasonal variation along Zhejiang and Fujian coast of the East China Sea are studied using a three-dimensional baroclinic nonlinear numerical model forced by QuikSCAT winds over 2000-2004, in which other important factors such as realistic topography, boundary currents (Taiwan Warm Current, Kuroshio and Changjiang Discharge) and heat flux are all included. Numerical model results indicate that there exist obvious upwellings in the coastal area along Zhejiang and Fujian coast during every season and their intensity and spatial distribution have distinct seasonal variability. The stronger upwelling centres are mostly located in the vicinity of Zhoushan Islands and Yushan Archipelago of Zhejiang coast, Haitan Island and Mazu Archipelago of Fujian coast. In addition, the mean upwelling velocity is about 0.3×10-3cm/s and the magnitude of upwelling intensity is 10-3cm/s in winter, while in summer they are about 0.3×10-2cm/s and 10-2cm/s, respectively. The modelling results also show that the change rate of upwelling intensity is less in wintertime with the weaker coastal upwelling but quite to the contrary in summertime.