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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。
Based on the total suspended sediment data of GOCI (Geostationary Ocean Color Imager) from January 2012 to December 2013, the weekly and monthly variations of the surface sediment front (concentration≥2mg / L) in the adjacent waters of the Yangtze River Estuary were analyzed. , And carried on the preliminary analysis to its mechanism. The results show that the surface of the Yangtze River estuary adjoining the surface of the suspended sediment front can be basically divided into four stages, namely: 1 to March of the export stability stage, April to May retreat stage, June to August Reserve Stable phase, September to December expansion phase to the sea. In April, it returned from recession and retreated in September. In January, the spread to the sea was the broadest, retreating in June to the nearest shore. The retreating speed of the suspension front during the alternation of spring and summer was about 1 times faster than that of the autumn and winter alternately. One year, the fastest retreat period is about 15-17 weeks, the fastest expansion period is about 38-39 weeks. The results also show that the rate of change of the front of the suspension with the speed of wind speed has a great correlation.