东海西北部中层冷水特征的时空变化  

The Spatial and Temporal Variations of the Characteristics of the Intermediate Cold Water in the Northwest of the East China Sea

作　　者：徐伯昌[1] 王宗山[1] 邹娥梅[1] 廖启煜[1] 

机构地区：[1]国家海洋局第一海洋研究所,青岛266061

出　　处：《黄渤海海洋》2000年第2期1-7,共7页Journal of Oceanography of Huanghai & Bohai Seas

基　　金：国家自然科学基金资助项目!( 498760 0 5)

摘　　要：根据 1 959～ 1 996年 3～ 6月水温资料 ,按 30′× 30′方区统计计算了东海西北部中层冷水的 8个示性特征值 ,并绘制了平面分布图。分析结果表明 ,东海西北部中层冷水于 3月出现 ,4月形成 ,5月达到盛期 ,6月消衰 ,其生消规律具有明显的季节性 ;其出现的海区为 2 8°～31°N ,1 2 4°E以西 (即台湾暖流路径 )海域 ,具有明显的地域性。示性特征的时—空分布变化反映出 :在形成期 ,地域性表现充分 ;在消衰期 ,反映出中层冷水下方的台湾暖流对它的影响明显 ;而在盛期 ,示性特征则为上述的过渡型。这为探讨海洋热、动力因子对其生消机制的影响奠定了实验基础。Based on the historical water temperature data during March to June of 1959 to 1996, the eight characteristic values of the intermediate cold water in the northwest of the East China Sea are estimated and its horizontal distributions drawn as well by 30′×30′ grid statistical method in this paper. The results show that the intermediate cold water occurs in March, generally takes form in April and develops into its mature stage in May, then it begins to decay in June in the East China Sea. The features of its formation and decay have distinct seasonal variations. It appears in the sea area west of 124°E and between 28°N and 31°N (i.e. the track of the Taiwan Warm Current), and also has significant local features. The spatial and temporal variations of intermediate cold water characteristics demonstrate the full local features during its formation stage, and shows transitional pattern during its mature stage. Meanwhile, the Taiwan Warm Current exerts an obvious influence on it during its decay stage. All such analyses lay the experimental foundation of the study on the influence of dynamic and thermodynamic factors on the mechanism of the formation and decay of the intermediate cold water.

关 键 词：中层冷水 示性特征 台湾 暖流 时空变化 东海 

分 类 号：P731.11[天文地球—海洋科学] P731.27