Numerical Study on the Coastal Upwelling and Its Seasonal Variation in the East China Sea

4区地球科学 Q3 Earth and Planetary Sciences

Journal of Coastal Research Pub Date : 2024-03-29 DOI:10.2112/jcr-si50-106.1

Z. Jing, Z. Hua, Yq Qi, Xh Cheng

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引用次数: 18

Abstract

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 20002004, 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 x 10(-3) cm/s and the magnitude of upwelling intensity is 10(-3) cm/s in winter, while in summer they are about 0.3 x 10(-2) cm/s and 10(-2) cm/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.

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东海沿岸上升流及其季节变化的数值研究

利用 2000~2004 年 QuikSCAT 风驱动的三维条带非线性数值模式研究了东海浙闽沿岸的上升流结构及其季节变化，并将现实地形、边界流（台湾暖流、黑潮和长江排流）和热通量等其他重要因素都包括在内。数值模式结果表明，浙闽沿海每个季节都存在明显的上升流，其强度和空间分布具有明显的季节变化。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。此外，冬季平均上升流速度约为 0.3 x 10(-3) cm/s，上升流强度约为 10(-3) cm/s；夏季平均上升流速度约为 0.3 x 10(-2) cm/s，上升流强度约为 10(-2) cm/s。模拟结果还表明，冬季沿岸上升流较弱，上升流强度的变化率较小，而夏季则相反。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Coastal Research 地学-地球科学综合

自引率

0.00%

发文量

审稿时长

3-8 weeks

期刊介绍： The Journal of Coastal Research (JCR) is one of the leading international journals for coastal studies and processes, and is published bi-monthly by the Coastal Education & Research Foundation [CERF]. By covering the entire field of coastal research, the JCR encompasses all subjects relevant to natural and engineered environments (freshwater, brackish, or marine) and the protection/management of their resources in the vicinity of coastlines of the world. Even though the journal broadly focuses on immediate shoreline zones, the JCR also embraces those coastal environments that either reach some indefinite distance inland or that extend seaward beyond the outer margins of the sublittoral (neritic) zone. The JCR disseminates accurate information to both the public and research specialists around the world on all aspects of coastal issues in an effort to maintain or improve the quality of our planet''s shoreline resources.