长江冲淡水的扩展及其营养盐的输运  

On the Extension and Nutrient Transportation of the Changjiang River Diluted Water

作　　者：王保栋[1] 

机构地区：[1]国家海洋局第一海洋研究所

出　　处：《黄渤海海洋》1998年第2期41-47,共7页Journal of Oceanography of Huanghai & Bohai Seas

摘　　要：本文根据长江口及其邻近海域硝酸盐和硅酸盐的平面分布特征，研究得出，除冬季外，长江冲淡水中的营养盐同时向两个方向输送，一、向北或东北输入南黄海西南部；二、向南或东南输入东海。据此提出“长江冲淡水双向扩展”的观点，即长江冲淡水先顺河口走向朝东南方向流动，到达口门处分成两部分（冬季除外），一部分穿过杭州湾口及舟山群岛一带沿岸南下，或自长江口向东南方向扩展；另一部分则左转向北或东北，进入南黄海西南部。南、北两股冲淡水的水量大小及其比例，因不同季节而异。Based on the study of the horizontal distribution features of nitrate and silicate in the Changjiang River estuary and its adjacent sea areas, it is pointed out that the nutrients in the Changjiang River Diluted Water (CRDW) are transported toward two different directions simulatanously from the river mouth except in winter——one toward north or northeast to enter the southwest of the Southern Yellow Sea, the other toward south or southeast to enter the East China Sea. Hence a new viewpoint 'Bidirectional extension of the Changjiang River Diluted Water' is put forward, that is, the CRDW first flows toward southeast along the estuarine trend, and then it is separated into two parts except in winter at the river mouth, one part of the CRDW extending southward along the coast passing through the mouth of Hangzhou Bay and the sea area of the Zhoushan Islands, or extending toward southeast from the river mouth; the other turning left and extending toward northeast or northward to enter the southwest of the Southern Yellow Sea. But the water quantities and the proportion of the two parts of the CRDW are different in different seasons.

关 键 词：扩展路径 长江 冲淡水 营养盐输运 

分 类 号：P734.44[天文地球—海洋化学]