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
张乃星 1孙旭 2曹丛华 1任荣珠 1陶卉卉 1孙滨 1王建勇 1侯继灵 1于洋1
作者信息
- 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;国家海洋局北海预报中心,山东青岛266033
- 2. 滨州技术学院,山东滨州256603
- 折叠
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30 m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3.52 mmol/(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.
Abstract
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, 10m, 30m depth and H Section. The results showed that the concentration of D1C and it's parameters in each depth were similar. The concentration of DIC and HCOs-decreasing from southwest to northeast. Temperature has important influence on the distribution of DIC and HCO3 . The relationship between ρ(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) ×103 mol/s.
关键词
溶解无机碳/渤海海峡/空间分布/源汇变化Key words
dissolved inorganic carbon/the Bohai Strait/spatial distribution/source/sink change引用本文复制引用
基金项目
000(2012B01)
国家海洋局青年海洋科学基金(2010503)
中国科学院海洋生态与环境科学重点实验室基金(KLMEES201003)
000(2011B11)
出版年
2012
NETL
NSTL
维普
万方数据