摘要
分析研究了2007年秋季黄海、东海海域颗粒有机碳(POC)的时空分布情况,结果表明:POC的浓度为7.25～766.00μg/L,平均浓度为(97.37±86.35)μg/L,其平面分布呈现近岸高、远岸低的特征,近岸POC的等值线与海岸线平行;垂直分布呈现除底层外随着深度增加逐渐降低的趋势。海水中POC浓度与浊度呈显著正相关,而与叶绿素a无显著相关关系,这表明POC主要来自于陆源输入。对不同海区POC的垂直分布和周日变化的研究结果表明,黄海区由于水深较浅,POC的垂直分布比较均匀,POC周日分布除了受到生物周日活动的影响外还受到潮汐作用的影响。长江口附近海区悬浮颗粒物浓度大小是POC浓度和分布的主要控制因素,垂直分布上表现出表层低底层高的特征。东海陆架区POC的垂直分布和周日变化均受到生物活动和水文条件等因素的共同作用,受黑潮影响的海域POC的浓度都相对较低。
The spatial and temporal distribution of particulate organic carbon（POC） in the Yellow Sea and East China Sea was studied in the autumn of 2007.The results showed that the concentrations of POC ranged from 7.25 μg/L to 766.00 μg/L and the average concentration was（97.37±86.35） μg/L.The horizontal distribution chart showed that the highest POC content appeared in coastal water area and decreased from coastal waters to offshore.POC isopleth in coastal waters ran parallel with the coastline.In vertical section,the concentration of POC decreased with depth except the bottom layer.The POC content was markedly correlated with turbidity,but it wasn＇t correlated with chlorophyll a.So it showed that epicontinental import was probably the main source of POC.The vertical distribution rule and diurnal variety of POC were different with the location of stations.In Yellow Sea,POC vertical distribution was even because of the shallow depth.The diurnal variety of POC was affected by the biological activity and the tide.Near the Changjiang River mouth,being influenced by the suspended particulate matter,the content of POC was low in the surface layer and high in the bottom layer.However,in the shelf break in the East China Sea,the vertical distribution and diurnal change were controlled by the biological activity and hydrological conditions.Specially,the content of POC was low in Kuroshio current area.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2011年第1期1-6,共6页
Marine Environmental Science
基金
国家重点基础研究发展计划(973)(2010CB428701)
我国主要河口及邻近海域环境质量评价(908-02-02-02)
关键词
POC
时空分布
黄东海
影响因子
POC； spatial and temporal distribution； Yellow Sea and East China Sea； influence factors
