渤海海峡冬季无机碳的立体分布特征及其源汇变化  

Distribution characteristics and source/sink changes of dissolved inorganic carbon around the Bohai Strait in winter

作　　者：张乃星[1,2] 孙旭[3] 曹丛华[1,2] 任荣珠[1,2] 陶卉卉[1,2] 孙滨[1,2] 王建勇[1,2] 侯继灵[1,2] 于洋[1,2] 

机构地区：[1]山东省海洋生态环境与防灾减灾重点实验室,山东青岛266033 [2]国家海洋局北海预报中心,山东青岛266033 [3]滨州技术学院,山东滨州256603

出　　处：《海洋学报》2012年第6期94-101,共8页

基　　金：近海二氧化碳体系的长期观测及其变化控制因子研究(2012B01);国家海洋局青年海洋科学基金项目(2010503);中国科学院海洋生态与环境科学重点实验室基金项目(KLMEES201003);海洋工程疏浚物中重金属赋存状态分析及评价(2011B11)

摘　　要：根据2010年2月至2010年3月对渤海海峡3个断面39个站位表层、10m层和30m层水体中盐度、水温、叶绿素a以及无机碳等参数的测定数据,分析了该季节溶解无机碳的分布特征以及源汇变化状况,探讨了影响其分布的主要因素。结果显示,调查期间渤海海峡水体中各水层溶解无机碳(DIC)及其组分浓度分布较一致,其中DIC及HCO3-的浓度等值线分布均呈现出从西南向东北梯度降低的趋势,且受温度影响明显;二氧化碳分压[p(CO2)]则表现出与叶绿素a含量成明显负相关的分布特征;位于渤海海峡东部的H断面垂直方向上,由于受黄海、渤海水团在海峡中部交汇混合形成的水体紊流影响,DIC及其组分在断面中部等值线分布较两边曲折。冬季渤海海峡表现出明显的源、汇分区分布特征,整个调查区海-气二氧化碳通量为3.52mmol/(m2·d),表现为大气CO2的弱源。冬季流经渤海海峡的DIC通量约为(130±2)×103 mol/s。The field observation was carried out in Febuary 2010 to March 2010. A total of 39 stations was established three transects. Based on the data collected, the composition and distribution of dissolved inor- ganic carbon（DIC） were examined in 0 m, 10 m, 30 m depth and H Section. The results showed that the concentration of DIC and it＇s parameters in each depth were similar. The concentration of DIC and HCO3- decreasing from southwest to northeast. Temperature has important influence on the distribution of DIC and HCO;-. The relationship between p（CO2） and chlorophyll-a was negative. In H section, the distribu- tion of DIC and it＇s parameters of middle section were more complicated than the other section. The CO2 flux at the Bohai Strait was 3.52 mmol/（m2. d）, which shows that this area was the source of CO2 in win- ter. The DIC flux flowed from the Bohai Strait was （130±2）×10^3mol/s.

关 键 词：溶解无机碳 渤海海峡 空间分布 源汇变化 

分 类 号：P76[天文地球—海洋科学]