珠江河口环流季节性变化特征分析  

Analysis of Seasonal Variation Characteristics of Circulation in Pearl River Estuary

作　　者：黄春华 刘晓建 郭辉群 侯堋 陈薇 HUANG Chunhua;LIU Xiaojian;GUO Huiqun;HOU Peng;CHEN Wei(Pearl River Water Resources Research Institute,Pearl River Water Resources Commission of the Ministry of Water Resources,Guangzhou 510610,China;Key Laboratory of the Pearl River Estuary Regulation and Protection of Ministry of Water Resources,Guangzhou 510610,China;Hohai University,Nanjing 210024,China)

机构地区：[1]珠江水利委员会珠江水利科学研究院,广东广州510610 [2]水利部珠江河口治理与保护重点实验室,广东广州510610 [3]河海大学,江苏南京210024

出　　处：《人民珠江》2023年第7期48-54,共7页Pearl River

基　　金：广东省2021年促进经济高质量发展海洋经济专项(GDNRC〔2021〕41);广东省基础与应用基础研究基金(2021A1515110428);广州市基础与应用基础研究基金(202102021286);水沙科学与水灾害防治湖南省重点实验室开放基金(2020SS02);海岸灾害及防护教育部重点实验室(河海大学)开放基金(202209)。

摘　　要：河口环流控制区域动力格局影响河口盐度、悬沙和营养盐的输运。基于海洋同化数据HYCOM,分析了珠江口环流的季节变化特点及其演变规律,构建了珠江河口环流年际运转路线。结果表明:①珠江口及其邻近水域的海流呈现明显的季节性变化,变化周期约为1 a,且越靠近外海变化周期越显著;②珠江河口外海常年被环流控制,冬季表现为西南向沿岸流,而夏季受南海暖流的影响,反转为东北向上升流,其中前者占比约66.5%大于后者约33.5%;③珠江河口内海流夏季表现为西南—东北向的往复流,冬季表现为逆时针环流。Estuarine circulation controls the regional dynamic pattern,which affects the salinity,suspended sediment,and nutrient salt transport in the estuary.Based on the ocean assimilation data HYCOM,this study analyzed the seasonal variation characteristics and evolution rules of the circulation in the Pearl River Estuary and constructed the annual circulation path in the Pearl River Estuary.The results show that:①The current in the Pearl River Estuary and its adjacent waters shows obvious seasonal variation,with a change period of about one year,and as the current gets closer to the open sea,the change period is more obvious;②the open sea of the Pearl River Estuary is controlled by the circulation all the year round,which shows southwest coastal current in winter and turns to northeast upwelling current in summer due to the influence of the South China Sea warm current,of which the former accounting for about 66.5%is more than the latter accounting for about 33.5%;③the current in the Pearl River Estuary is a southwest-northeast reciprocating flow in summer and a counterclockwise circulation in winter.

关 键 词：环流 季节变化 HYCOM 珠江河口 

分 类 号：TV856[水利工程—水利水电工程]