烟台四十里湾叶绿素a浓度的时空分布特征及其影响机制 |
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引用本文: | 沈春燕,施 平,赵 辉. 烟台四十里湾叶绿素a浓度的时空分布特征及其影响机制[J]. 海洋科学, 2014, 38(9): 33-38 |
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作者姓名: | 沈春燕 施 平 赵 辉 |
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作者单位: | 中国科学院 南海海洋研究所 热带海洋环境国家重点实验室;广东海洋大学;中国科学院大学;中国科学院 南海海洋研究所 热带海洋环境国家重点实验室;广东海洋大学 |
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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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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。
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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 |
收稿时间: | 2013-09-25 |
修稿时间: | 2014-02-21 |
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. |
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Keywords: | Sishili Bay chlorophyll a concentration MODIS sea surface tempreture wind |
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