热带海洋学报 ›› 2010, Vol. 29 ›› Issue (6): 15-21.doi: 10.11978/j.issn.1009-5470.2010.06.015

• 海洋水文学 • 上一篇    下一篇

2006年夏季珠江冲淡水扩展及生态响应

杨阳, 孟强, 夏华永, 李锐祥, 朱鹏利   

  1. 国家海洋局南海工程勘察中心, 广东 广州 510300
  • 收稿日期:2010-05-24 修回日期:2010-07-02 出版日期:2010-12-15 发布日期:2010-12-15
  • 作者简介:杨阳(1976—), 湖南省衡阳市人, 工程师, 当前主要从事海洋水文气象研究工作。E-mail: yyang0213@scsio.ac.cn
  • 基金资助:

    国家908项目(908-02-01-03)

Expansion of the Pearl River diluted water in 2006 and its ecological response

YANG Yang, MENG Qiang, XIA Hua-yong, LI Rui-xiang, ZHU Peng-li   

  1. South China Sea Engineering Surveying Center, State Ocean Administration, Guangzhou 510300, China
  • Received:2010-05-24 Revised:2010-07-02 Online:2010-12-15 Published:2010-12-15
  • About author:杨阳(1976—), 湖南省衡阳市人, 工程师, 当前主要从事海洋水文气象研究工作。E-mail: yyang0213@scsio.ac.cn
  • Supported by:

    国家908项目(908-02-01-03)

摘要:

根据珠江口及其附近海域2006年夏季(7—8月)航次的调查资料, 发现珠江冲淡水同时向粤西和粤东扩展, 最东可扩展至红海湾中部海域, 向西最远可扩展至阳江海陵岛东侧, 在西南季风的Ekman驱动下, 向外海扩展至21.2?N, 冲淡水产生的羽状锋十分明显, 大致位于10m水深之上; 在陆架区存在上升流; 在高栏列岛及担杆列岛东南海域分别存在孤立低盐水团; 表层浊度、叶绿素a、溶解氧的间分布形态表明其输运路径受珠江冲淡水扩展路径的影响, 叶绿素a高浓度区对应溶解氧高浓度区, 其高浓度区分别位于上下川岛海域和万山群岛海域。

关键词:  珠江口, 冲淡水, 羽状锋, 溶解氧

Abstract:

Expansion of Pearl River diluted water is studied based on measurements in the Pearl River Estuary and surround-ing sea areas in the summer of 2006. The results show that the Pearl River diluted water mainly expands westward, which can expand to the eastern side of Hailing Island. Sometimes it expands eastward to the middle of the Honghai Bay. It expands to the open sea to 21.2°N aided by Ekman flow during southwestern monsoon period. The plume front of the Pearl River diluted water is very obvious, which is located at waters above 10 m. Isolated low salinity water is found in the southeast sea area of the Gaolan Islands and Lema Islands, respectively. On the continental shelf, the distribution of suspended sediment concentra-tion, chlorophyll-a, and dissolved oxygen are influenced by the Pearl River diluted water, which present double-peak. The suspended sediment carried by the Pearl River diluted water is the main source of the sediment on the continental shelf. The high concentration of chlorophyll-a corresponds to high concentration of dissolved oxygen, which is located in the sea area of Shangxiachuan Islands and Wanshan Islands.

Key words: Pearl River Estuary, diluted water, plume front, dissolved oxygen