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
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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、10 m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 inorganic 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 HCO3-. The relationship between p(CO2) and chlorophyll-a was negative. In H section, the distribution 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 winter. The DIC flux flowed from the Bohai Strait was (130±2)×103 mol/s.
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Key words:
- dissolved inorganic carbon /
- the Bohai Strait /
- spatial distribution /
- source/sink change
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PETIT J R, JOUZEL J, RAYNAUD D, et al. Climate and atmospheric history of the past 420000 years from the Vostok ice core Antarctical[J]. Nature, 1999, 399:429-436. SUBINE C L, FEELY R A, CRUBER N, et al. The oceanic sink for anthropogenic CO2[J]. Science, 2004, 305: 367-371. CAI W J, DAI M H. Comment on "Enhanced open ocean storage of CO2 from shelf sea pumping"[J]. Science, 2004, 306: 1-477. MEHRBACH C, CULBERSON C H, HAWLEY J E, et al. Measurement of the apparent dissociation constants of carbonic acid in seawater at atmospheric pressure[J]. Limnology & Oceanography, 1973, 18(6): 897-907. MILLERO F J, DEGLER E A, O'SULLIVAN D W, et al. The carbon dioxide system in the Arabian Sea[J]. Deep-Sea Research Ⅱ, 1998, 45: 2225-2252. 宋金明. 中国近海生物地球化学[M]. 济南:山东科技出版社, 2004:1-591. 尹文昱, 张永宁. 渤海海峡风浪特征统计分析[J]. 大连海事大学学报(自然科学版), 2006, 32(4): 84-88. 张志欣, 乔方利, 郭景松, 等. 渤海南部沿岸水运移及渤黄海水体交换的季节变化[J]. 海洋科学进展,2010, 28(2): 142-148. 林霄沛, 吴德星, 鲍献文, 等. 渤海海峡断面温度结构及流量的季节变化 [J]. 青岛海洋大学学报(自然科学版), 2002, 32(3): 355-360. 高学鲁, 宋金明, 李学刚, 等. 南黄海秋季溶解无机碳的分布特征[J]. 海洋环境科学, 2009, 28(1):17-21. 张远辉, 黄自强, 王伟强, 等. 台湾海峡二氧化碳研究[J]. 台湾海峡, 2000, 19(2):163-169. 鲍献文, 万修全, 吴德星, 等. 2000年夏末和翌年初冬渤海海水水文特征[J]. 海洋学报, 2004, 26(1): 14-24. RÍOS A F, PÉREZ F F, ÁLVAREZ M, et al. Seasonal sea-surface carbon dioxide in the Azores area[J]. Marine Chemistry, 2005, 96(1/2):35-51. WANNINKHOF R. Relationship between wind speed and gas exchange over the ocean[J]. Journal of Geophysical Research, 1992, 97(C5):7373-7382. -
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