大亚湾溶解有机碳的时空分布  

Spatial-temporal distribution of dissolved organic carbon in the Daya Bay

作　　者：黄道建[1] 郭振仁[1] 綦世斌[1] 王雄[1] 

机构地区：[1]环境保护部华南环境科学研究所,广东广州510655

出　　处：《生态科学》2012年第5期548-552,共5页Ecological Science

基　　金：环保公益性行业科研专项-近岸海域环境与生态数字化实时管理系统(200909046);环境保护部华南环境科学研究所中央级公益性科研院所基本科研业务专项-大亚湾南海石化排污口海域海水有机碳的分布特征及其对有机污染的指示研究

摘　　要：于2010年12月～2011年11月分4个季度,在大亚湾海域布设9个采样点采集海水样品,用于溶解有机碳的测定,通过高温催化氧化法完成样品的分析。结果表明,大亚湾海域表层水DOC含量的变化范围为0.953～2.109 mg.L-1,均值为1.369mg.L-1,高于大洋的平均值,具有典型近海特征。DOC的水平分布大致呈现出靠近陆域(尤其是靠近澳头一侧)的含量较高,大辣甲西侧及西北侧水域较低的分布特征。大亚湾DOC含量呈现出夏季>秋季>春季>冬季的季节变化趋势。大亚湾DOC含量与浮游植物数量和浮游动物干重不具有明显的线性相关,表明生物作用对DOC含量分布趋势影响并不明显,大亚湾DOC含量可能还受到人类活动和水动力学等的影响。The study examined the spatial-temporal distribution of dissolved organic carbon（DOC） in the Daya Bay.The data were collected in four different seasons from December 2010 to November 2011.Seawater samples were collected for DOC determination from 9 sampling stations.DOC concentration was determined by high temperature catalytic oxidation method.The results showed that the surface DOC concentration ranged from 0.953-2.109 mg.L-1,with average concentration 1.369 mg.L-1higher than that in the open ocean,and it had a typical offshore feature.The horizontal distribution of DOC showed that DOC concentration was high in offshore area（especially the area near Aotou） and low in the north northwest area of Dalajia.The temporal distribution of DOC showed a trend of summerautumnspringwinter.The correlation between DOC and cell density of phytoplankton（or dry weight of zooplankton） was not significant,indicating DOC was not affected by biological activities.It may be related with human activities,hydrodynamics and other factors.

关 键 词：大亚湾 溶解有机碳 时空分布 

分 类 号：P67[天文地球—海洋地质]