| 摘要: |
| 本文利用2003～2012 年MODIS(Moderate Resolution Imaging Spectrometer)卫星遥感数据, 分析了四十里湾叶绿素a 浓度的时空分布特征, 并探讨其影响机制。结果表明, 四十里湾叶绿素a 浓度具有显著的时空分布特征。从空间分布来看, 全年均是南部近岸较高, 从西南的湾内向东北的湾外逐渐降低。逛荡河口正北约6 km 海域在4～5、7～9 月出现叶绿素a 高值羽。从时间分布来看, 四十里湾叶绿素a 浓度夏季最高, 春秋次之, 冬季最低, 5 月份和8 月份出现峰值, 呈现温带海域特有的“双峰”特性。四十里湾年平均叶绿素a 浓度呈现波动状态, 波动范围约为6～12 mg/m3。四十里湾叶绿素a 浓度的分布及变化与海表面温度成正相关, 相关系数是0.41。另外, 入海排污和海水养殖业等人类活动可能也是影响四十里湾叶绿素a 浓度时空变化的重要因素。 |
| 关键词: 四十里湾 叶绿素a 浓度 MODIS(Moderate Resolution Imaging Spectrometer) 海表面温度 风场 |
| DOI：10.11759/hykx20130925002 |
| 分类号: |
| 基金项目:国家自然科学基金项目(41376125, 41006070);广东省教育厅项目(2012KJCX0065);广东海洋大学引进人才科研启动项目 |
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| Spatial-temporal distribution characteristics of chlorophyll a and the controlling factors in the Sishili Bay of Yantai |
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| Abstract: |
| This study investigated the spatial-temporal distribution characteristics of chlorophyll a (chl-a) in Sishili Bay using MODIS satallite remote sensing data from 2003 to 2012, and analyzed the relationship between chl-a distribution and influential factors. Results showed that the chl-a concentration in Sishili Bay had a significant spatial-temporal characteristics. The chl-a showed a decreased tendency from estuary to offshore. A plume appeared 6 km away from Guangdang River estuary in April, May, July, August and September. The highest value of chl-a appeared in summer, and the lowest in winter. The higher value appeared in May and August showed an obvious double-peak character. The relationship between chl-a and sea surface temperature was positive with a correlation coefficient of 0.41. The distribution of chl-a may also be related to the human activities, especially sewage and aquaculture. |
| Key words: Sishili Bay chlorophyll a concentration MODIS sea surface tempreture wind |
