| 摘要: |
| 收集了1990年-2019年长江口及其邻近海域（120°30'E~123°30'E，29°00'N~32°30'N）记载的赤潮事件，基于GIS软件对所有赤潮事件进行整理，分析了赤潮的时空分布规律，并绘制长江口及邻近海域赤潮分布图。结果表明：近30年来，长江口及其邻近海域赤潮经历了先升高后下降的过程，赤潮次数共计144次，赤潮面积>1 000 km2有28次。赤潮发生核心区集中在长江口外、花鸟山-嵊泗列岛、岱山岛-中街山列岛、舟山岛-朱家尖岛海域；长江口及邻近海域赤潮多发期为5-8月，5、6、7、8月发生的赤潮次数分别占总数的28.37%、34.75%、17.78和9.29%；东海原甲藻（Prorocenrum donghaiense）、中肋骨条藻（Skeletonema costatum）是长江口及其邻近海域最常见赤潮肇事种，发生次数分别为55次和40次，占统计总次数的38.19%和27.78%，2000年以来，东海原甲藻赤潮发生频率呈上升态势。 |
| 关键词: 长江口及邻近海域 赤潮 时空分布 地理信息系统 |
| DOI：10.11759/hykx20210220001 |
| 分类号:X145 |
| 基金项目:国家重点研发计划项目（2016YFA0600904，2017YFC040470002） |
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| Temporal and spatial distribution of red tides in the Changjiang estuary and in adjacent waters from 1989 to 2019 |
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ZHAO Yan-min, QIN Yan-wen, ZHANG Lei, QIAO Fei, MA Ying-qun
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Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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| Abstract: |
| Red tide events were collected in the Changjiang estuary and adjacent waters from 1989 to 1990. A geographic information system (GIS) was used to analyze the temporal and spatial distribution of the red tide. Results showed a total count of 144 red tide events. There were 28 red tide events in a covered area larger than 1000 km2. Outside the Changjiang estuary, the Huaniaoshan-Shengsi archipelago and Zhoushan-Zhujiajian island were the red tide-prone areas. Most of the red tide events occurred from May to August with a frequency of occurrence of 28.37%, 34.75%, 17.78%, and 9.29% in May, June, July, and August, respectively. Prorocentrum donghaiense and Skeletonema costatum were the dominant species of red tides in the Changjiang estuary and the adjacent sea. |
| Key words: Changjiang estuary and adjacent waters red tide temporal and spatial distribution geographic information system |
