闽浙沿岸流扩展范围的季节特征及其对典型海湾的影响

Characteristics of seasonal spatial expansion of Fujian and Zhejiang Coastal Current and their bay effects

根据2006~2007年春、夏、秋、冬季4个航次的监测数据分析闽浙沿岸流扩展范围和温度、盐度、营养盐含量平面分布季节变化特征,结果显示:调查期间,闽浙沿岸流主要分布于浙闽沿岸海域,具有明显的季节变化特征,冬季闽浙沿岸流扩展范围最大,可影响至广东南澳岛海域,秋季次之,可影响至厦门湾、东山湾海域,春季可扩展至泉州湾附近海域,夏季影响范围最小,仅局限于浙江北部沿岸海域.选取福建罗源湾、厦门湾和东山湾,分析闽浙沿岸流对典型海湾的影响,结果显示:冬季闽浙沿岸流给福建典型海湾带来了大量的营养盐物质,罗源湾、厦门湾和东山湾均受其影响,海水营养盐含量明显提高,秋季次之,春季影响略小,夏季基本不受闽浙沿岸流影响.

According to the data from 4 surveys in spring,summer,autumn and winter during 2006 ~ 2007,the seasonal variation of Fujian and Zhejiang Coastal Current( FZCC) spatial expansion,temperature,salinity and nutrient contents horizontal distribution were analyzed. The results showed that FZCC during the investigation was mainly distributed in Zhejiang and Fujian coastal waters,with obvious seasonal changes. The expansion of FZCC in winter was the largest,of which it can affect the coastal waters around Nanao Island in Guangdong,followed by FZCC in autumn,which can affect the coastal waters around Xiamen Bay and Dongshan Bay. In spring FZCC can expand to Quanzhou Bay,while in summer the expansion was the smallest,only distributed in northern coastal waters of Zhejiang Province. Luoyuan Bay,Xiamen Bay and Dongshan Bay were selected to analyze the impact of FZCC on typical bays. The result showed that a lot of nutrient material was brought by FZCC to typical bays in winter,and the nutrient content of seawater in Luoyuan Bay,Xiamen Bay and Dongshan Bay were obviously increased. The impact of FZCC in autumn and spring was minor,and in summer these bays were not affected.