海洋科学2017，Vol.41Issue(12)：1-8,8.DOI:10.11759/hykx20151108001
苏北浅滩外侧潮汐锋的季节变化及结构分析
Analysis on seasonal variations and structures of the tidal front outside of the Subei Shoal
摘要
Abstract
This research studies the tidal front out of the Subei Shoal because this tidal front has an important mesoscale physical process that affects the ecological environment in the Western Yellow Sea in summer. The changes have important effects on the marine environment, marine ecosystem, navigation and fishery. In this paper, the high resolution (1/18)° simulated results from the Princeton Ocean Model (POM) were used to study the sea-sonal distributions and characteristics of the tidal front in the Subei Shoal. The results show that the tidal front out-side the Subei Shoal has significant seasonal variations. The tidal front appears in late spring and then gradually become stronger. The strength of the tidal front reaches a maximum and its position is stable in summer, the width of which is about 40 km, and the sea surface temperature (SST) gradient strength of tidal front is 0.35℃/km. As the vertical mixing increased due to surface cooling and winds, the tidal front gradually became weaker in fall and eventually disappeared in winter. In comparison with the observations, the isotherms near the frontal zone rise to-wards the land along the 34°N section, causing an upwelling due to the combined effects of the inner Ekman trans-port and topographical change. In addition, the cold-water center in the sublayer was near 122.2°E. The temperature and velocity across the tidal front are closely related to the vertical mixing, and a southern jet appeared along the front because of the baroclinicity effect. The research results increased the understanding of the structures of the tidal front out of the Subei Shoal and provides a reference on studying the dynamical processes of the ecological environment in the Western Yellow Sea.关键词
苏北浅滩/潮汐锋/潮汐锋季节变化/上升流Key words
the Subei Shoal/tidal front/seasonal variation/upwelling分类
海洋科学引用本文复制引用
程雪丽,孙群,王玉衡,杨洋..苏北浅滩外侧潮汐锋的季节变化及结构分析[J].海洋科学,2017,41(12):1-8,8.基金项目
国家自然科学基金项目(41376006) （41376006）
中国科学院战略性先导科技专项(XDA11020305) （XDA11020305）
国家重点研发计划项目(2016YFA0601301) （2016YFA0601301）
国家重点基础研究发展计划项目(2011CB403606) National Natural Science Foundation of China,No.41376006 （2011CB403606）
Strategic Priority Research Program of the Chinese Academy of Sciences,No.XDA11020305 （）
National Key Research and Development Program of China,No.2016YFA0601301 （）
National Key Basic Research Development Program,No.2011CB403606 （）
