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东海温度锋的分布特征及其季节变异 预览 被引量:15

DISTRIBUTIONAL FEATURES AND SEASONAL VARIATIONS OF TEMPERATURE FRONTS IN THE EAST CHINA SEA
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摘要 根据1934-1988年东海水文观测资料,重点分析东海温度锋的分布特征及其季节变异,并结合近期中日黑潮合作调查研究成果,初步探讨温度锋季节变异和水团演变的关系,所得主要结论是:(1)东海不仅常年存在浙闽沿岸锋,东海北部陆架锋和黑潮锋,而且、春、夏两季,在东海南部还出现一条东海中部出架锋。(2)江海温度锋季节变化的特点是:冬季,锋的宽度和强度皆是表层最强,夏季,表层温度锋仅出现在浙江近岸小范围海域。 Distributional features and seasonal variations of the temperature fronts in the East Chna Sea (ECS) are analysed mainly based on the 1934 - 1988 observationas of water temperature. The relationship between the seasonal variation of the fronts and the evolution of the water masses is studied in the light of the results of the Chna-Japan Joint lnvestigation and study on the Kuroshio. Main results are as folloWs:1. In the ECS three fronts, Zhe-Min coastal front, northern ECS shelf front,Kuroshio front clearly appear in the four seasons, in addition, a midddle ECS shelf front occurring in the southern ECS in spring and summer with the northward intrusing of Taiwan Strait water.2. The geographic position, width and strength of the fronts have remarkable seasonal variations: the width and strength on the surfaee are the largest in winter, the next in spring, and the ones below the surface are the strongest in summer.3 Since the geographic positions of the fronts are different, their distribution and variation show regional difference. Geographically, the Kuroshio front is the most stable, and the shelf fronts show much large variation. On multi-year average, front strength in decreasing order is the Kuroshio front (0.14℃ /n mile), Zhe-Min coastal front (0.14℃ /n mile), middle shelf front (0.13℃ /n mile) and northern shelf front (0.10℃/n mile).4. The number, main shape, width and the strength variation of the fronts de-pend basically on the disposition and evolution of the ECS water masses, with the ECS shelf mixing water playing a key role in the distribution and variation of the fronts.
作者 汤毓祥 Tang Yuxiang(First Institute of Oceanography,sOA,Qingdao 266003)
出处 《海洋与湖沼》 CAS CSCD 北大核心 1996年第4期 436-444,共9页 Oceanologia Et Limnologia Sinica
基金 国家自然科学基金!491300015 国家八五攻关项目!903-08-07
关键词 东海 温度锋 分布特征 季节变异 East China Sea Temperature front Distribution feature Seasonal variation
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