春季黄、渤海中异戊二烯的浓度空间分布与海-气通量

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摘要利用吹扫捕集-气质联用方法测定了2014年5月黄海、渤海所取海水样品中异戊二烯的含量，探讨了其分布特征、海-气通量及影响因素.研究结果表明：春季黄海、渤海海域表层海水中异戊二烯的浓度范围为6.02~32.91pmol/L，（平均值±标准偏差）为（15.39±4.98）pmol/L，在黄海中部海域出现浓度高值；表层海水中异戊二烯与叶绿素a（Chl-a）浓度有一定的正相关性（R²=0.2529，n=49，P < 0.001），说明浮游植物生物量在异戊二烯生产和分布中发挥重要作用；春季黄海、渤海异戊二烯海-气通量的变化范围为0.78~192.43nmol/（m²·d），（平均值±标准偏差）为（24.08±30.11）nmol/（m²·d），表明我国陆架海区是大气异戊二烯重要的源.

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关键词 ：异戊二烯, 分布特征, 海-气通量, 黄海, 渤海

Abstract：Isoprene concentrations were determined by gas chromatography with mass spectrum detector (GC-MSD) coupled with purge-and-trap system to study the spatial distribution as well as sea-to-air flux and influencing factors.The results showed that the concentrations of isoprene ranged from 6.02 to 32.91pmol/L in the surface seawater of the Yellow Sea and the Bohai Sea in spring,with an average of (15.39±4.98) pmol/L.The highest concentration of isoprene was found in central Yellow Sea.A positive correlation was observed between isoprene and Chl-a concentrations (R²=0.2529,n=49,P <0.001),suggesting that phytoplankton play an important role in the production and distribution of isoprene.The sea-to-air flux ranged from 0.78 to 192.43nmol/(m²·d),with a mean value of (24.08±30.11) nmol/(m²·d).The study shows that the shelf seas of China might be an important source of isoprene.

Key words： isoprene distribution sea-to-air flux Yellow Sea Bohai Sea

收稿日期: 2017-08-07

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基金资助:国家重点研发计划项目（2016YFA0601301）；国家自然科学基金（41306069）；中国科学院海洋研究所海洋生态与环境科学重点实验室开放基金（KLMEES201602）；中央高校基本科研业务费项目（201513049）

通讯作者: 张洪海,副教授,honghaizhang@ouc.edu.cn E-mail: honghaizhang@ouc.edu.cn

作者简介: 吴英璀(1993-),女,山东东营人,中国海洋大学化学化工学院硕士研究生,主要从事海洋异戊二烯分布与通量的研究.

引用本文:

吴英璀, 李建龙, 王健, 张洪海, 杨桂朋. 春季黄、渤海中异戊二烯的浓度空间分布与海-气通量[J]. 中国环境科学, 2018, 38(3): 893-899. WU Ying-cui, LI Jian-long, WANG Jian, ZHANG Hong-hai, YANG Gui-peng. Spatial distribution and sea-to-air flux of isoprene concentration in the Yellow Sea and the Bohai Sea in spring. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(3): 893-899.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2018/V38/I3/893

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