根据MODIS数据研究海岸河口水域上升流现象-河海大学期刊部主办.PDF

第41卷第5期 河 海 大 学 学 报 ( 自然 科 学 版 ) Vol.41No.5 2013年9月 Journal of Hohai University(Natural Sciences) Sep. 2013 DOI:10.3876/ j.issn.1000 1980.2013.05.017 根据MODIS数据研究海岸河口水域上升流现象 徐福敏,李摇 婷 (河海大学港口海岸与近海工程学院,江苏 南京摇 210098) 摘要:基于MODIS数据反演得到Mackenzie 河口2007 年8—9 月海洋表面温度分布,结合该河口 Pelly 气象站实测风速、风向数据,分析Mackenzie 河口水域的上升流特点,重点分析上升流的产生 条件、发展、强度,以及它们随纬度、风向及风速的变化关系。 结果表明:当东向风(160毅~200毅)吹 刮时间长于半天时,即有上升流产生,且东风时(180毅)最强烈;东向风持续吹刮时,风速越大,上升 流现象越强烈、影响范围越广。 关键词:海表温度分布;上升流;MODIS数据;Mackenzie河口 中图分类号:P731郾21摇 摇 摇 文献标志码:A摇 摇 摇 文章编号:1000 1980(2013)05 0466 05 Study of upwelling phenomenon in estuaries and coasts based on MODIS data XU Fumin,LI Ting (Harbor,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China) Abstract:Based on remote sensing data from a moderate鄄resolution imaging spectroradiometer,the sea surface temperature (SST) of the Mackenzie Estuary in August and September of 2007 was obtained using MODIS data, and the characteristics of the upwelling phenomenon, especially the relationships between the generation, development,strength of upwelling,the latitude,wind direction,and wind speed were analyzed,combined with thewindfactorsatthePelly Station duringthisperiod. Theresultsshow that,whentheeasterlywind (160毅鄄200毅) lasts more than half a day in the summer,upwelling will appear,and it will be strongest with an easterly wind direction of 180毅. The upwelling will be stronger and affect a wider range when the wind speed is higher. Key words:sea surface temperature distribution;upwelling;MODIS data;Mackenzie Estuary [1鄄2] [3] 海洋升降流研究对于气候变化 、海洋环境、渔业养殖和社会经济均具有重大意义 。 上升流可以把 [4鄄5] 海底丰富的营养物质带到海洋上层,是渔场形