春季东海北部近岸水体中的溶解无机碳和有机碳的分布特征及其影响因素  

Dissolved inorganic and organic carbon in the North of East China Sea(ECS) coastal waters in spring

作　　者：李宁[1] 王江涛[1] 

机构地区：[1]r中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266100

出　　处：《海洋科学》2011年第8期5-10,共6页Marine Sciences

基　　金：国家自然科学基金项目(41076065);国家重点基础研究发展计划资助项目(2010CB428701)

摘　　要：根据2010年4月在东海北部近岸的调查,分析了研究海域溶解无机碳(DIC)和溶解有机碳(DOC)的含量及其分布状况,并分别对DIC、DOC与温度、盐度、表观耗氧量等要素的关系进行了初步探讨。结果表明,春季研究海域表、底层DIC平均含量分别为24.54 mg/L和25.03 mg/L,平面分布趋势均为近岸高于远岸,象山口附近DIC的浓度最高,北部由于受长江径流的影响,DIC的浓度也较高。垂直分布特点为底层浓度高于表层。DOC的表、底层含量分别为0.96 mg/L和0.87 mg/L,平面分布特点与DIC类似,表现为近岸浓度高,远岸浓度低。DOC的垂直分布特点与DIC正好相反,表现为表层浓度高于底层。研究海域DIC与温度、盐度和表观耗氧量的关系表明,DIC主要受陆源输入和温度的影响,且温度的影响作用较大。研究海域DOC与温度、盐度和表观耗氧量的关系表明,DOC受陆源输入的影响更大,同时受一定的生物活动的影响。Concentrations and distributions of dissolved inorganic carbon （DIC） and organic carbon （DOC） as well as their relationships with temperature, salinity, and dissolved oxygen in the North of ECS Coastal Waters during April in 2010 were analyzed. The average concentrations of DIC in surface and bottom water of our study area were 24.54mg/L and 25.03mg/L, respectively. The average concentrations of DOC in surface and bottom water of our study area were 0.96mg/L and 0.87mg/L, respectively. The characteristics of distributions of DIC and DOC were both higher near the coastal line and lower in outer sea. There were high concentrations at northeast of the survey area because of inputs by Changjiang River. As to vertical distribution, the concen- tration of DIC in surface water was lower than that in bottom water, while the vertical distribution of DOC was contrary to that of DIC. Relationships between DIC and DOC, and their relationships with temperature, salinity, and AOU indicated that temperature was the main factor influencing DIC distribution, while terrestrial input and biological activities played important parts in distribution of DOC.

关 键 词：溶解无机碳(DIC) 溶解有机碳(DOC) 东海北部近岸 

分 类 号：P734.2[天文地球—海洋化学]