近年来渤海湾赤潮监控区营养盐变化及其结构特征分析  

Analysis of variations and structure characteristic of nutrients in Red-tide Monitoring Area of Bohai Bay in recent three years

作　　者：石海明[1] 尹翠玲[1] 张秋丰[1] 徐玉山[1] 王彬[1] 

机构地区：[1]国家海洋局天津海洋环境监测中心站,天津300450

出　　处：《海洋环境科学》2010年第2期246-249,共4页Marine Environmental Science

摘　　要：根据2004～2006年进行的连续监测结果，分析、探讨了渤海湾赤潮监控区表层海水营养盐的污染现状、变化规律及其结构特征。结果表明：近年来，渤海湾赤潮监控区海域受到了DIP、DIN污染，水体处于严重的富营养化状态，且DIN的污染程度明显高于DIP；除个别项目外，渤海湾赤潮监控区以S4站营养盐含量最高，原因是S4站靠近河口，大量生活污水排放所致；在赤潮多发期，表层海水N、P、Si含量存在明显的月变化特征。6月份营养盐含量最低，8月份最高。年际变化表明：NH4-N的年际变化最为明显，表现为逐年递减的趋势，而SiO3-Si的年际变化最小。赤潮监控区DIN一直处于热力学平衡状态，NO3-N占DIN含量的57％～78％。近年来DIN／PO4-P和Si03-Si／PO4-P逐年增加，而SiO3-Si/DIN则逐年降低。On the basis of the monitoring data of nutrients （N, P and Si） in surface seawater from May to Sep. （2004 - 2006） in the red tide monitoring area st six monitoring stations of Bohai Bay, the variations and their structure characteristics of nutrients in the red tide monitoring area were analyzed and discussed. The results showed that the water quality in the red tide monitoring area was still seriously over-nutritious and was polluted by high N and P obviously in recent three years and N pollution is more seriously than P. The nutrients content was the highest st fourth station, which was due to the drain of sewage from daily life. The character of monthly differences was obvious for N,P and Si content and which was the highest in Aug. and lowest in Jun. NH4-N content was lower and lower annually which was the most different in recent years and the SiO3-Si content was the least changed. NO2-N and PO4-P was the lowest and NO3-N, SiO3 -Si was the highest in 2005. The inorganic-nitrogen （DIN） was in a state of thermodynamic-balance in the whole red tide monitoring area,and the ratio of NO3-N to DIN was 57% - 78%. In recent years, DIN/PO4-P and SiO3-Si/PO4-P were increased and SiO3-Si/DIN decreased annually.

关 键 词：渤海湾 赤潮监控区 营养盐变化 结构特征 

分 类 号：P734.44[天文地球—海洋化学]