基于GOCI卫星数据的长江口毗邻水域悬浮体锋面时空变化特征

发布时间：2017-12-26 16:04

本文关键词：基于GOCI卫星数据的长江口毗邻水域悬浮体锋面时空变化特征　出处：《海洋湖沼通报》2016年02期 　论文类型：期刊论文

【摘要】：依据2012年1月至2013年12月2年的GOCI(Geostationary Ocean Color Imager)卫星总悬浮体数据,分析了长江口毗邻水域的表层悬浮体锋面(浓度≥2mg/L)的周、月变化特征,并对其机制进行了初步分析。研究结果显示,长江口毗邻水域表层悬浮体锋面变化可基本分为4个阶段,即:1~3月的外输稳定阶段、4~5月的向岸退缩阶段、6~8月的内储稳定阶段、9~12月的向海扩张阶段。4月由输变退,9月由退变输,1月向外海扩散面积最为广阔,6月向岸退缩得最近。春夏交替时期悬浮体锋面的退缩速度较秋冬交替时的扩张速度快约1倍。一年中,退缩最快的时段约在第15~17周,扩张最快的时段约为第38~39周。结果还表明悬浮体锋面的变化速度与风速的变化速度有很大的相关性。
[Abstract]:According to the January 2012 to December 2013 2 years of GOCI (Geostationary Ocean Color Imager) satellite data analysis of the total suspension of the Yangtze River Estuary and adjacent waters of the surface (concentration is 2mg/L) front suspension weekly, monthly variation, and the mechanism was analyzed. The research results show that the Yangtze River estuary waters adjacent to the front surface suspended matter changes can be divided into 4 stages, namely: 1~3 month output stabilization stage, 4~5 month onshore withdrawal stage, storage stable stage, 6~8 months and 9~12 months expansion phase to the sea. In April by the transmission back to September by January to sea transport degeneration, diffusion area of the most extensive, in June the shore back recently. The shrinkage rate of the suspension front in the spring and summer alternate period is about 1 times faster than that in the autumn and winter. The fastest shrinking period of the year was around week 15~17, and the fastest expansion period was about week 38~39. The results also show that the velocity of the change of the suspension front is closely related to the velocity of the wind speed.
【作者单位】：中国海洋大学海洋技术系;中国科学院南海海洋研究所;
【基金】：国家自然科学基金(41276041)资助
【分类号】：X55;X87
【正文快照】： 引言悬浮体是水体中各类营养盐和污染物的重要载体,而且影响着海水的透光度,对海底沉积、海岸侵蚀也有着重要影响。我国黄、东海海域悬浮体浓度高,季节变化明显,是世界上悬浮体含量最高的海域之一。因此,对该区域的悬浮体锋面的研究具有重大意义。悬浮体的常规调查方法就是用

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