春季黄、渤海中异戊二烯的浓度空间分布与海-气通量  

Spatial distribution and sea-to-air flux of isoprene concentration in the Yellow Sea and the Bohai Sea in spring

作　　者：吴英璀 李建龙[1] 王健[1] 张洪海[1] 杨桂朋[1,2] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100 [2]青岛海洋科学与技术国家实验室,海洋生态与环境科学功能实验室,山东青岛266071

出　　处：《中国环境科学》2018年第3期893-899,共7页China Environmental Science

基　　金：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)

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(R^2=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/(m^2·d),(平均值±标准偏差)为(24.08±30.11)nmol/(m^2·d),表明我国陆架海区是大气异戊二烯重要的源.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. Theresults showed that the concentrations of isoprene ranged from 6.02 to 32.91pmol/L in the surface seawater of the YellowSea and the Bohai Sea in spring, with an average of （15.39 ± 4.98） pmol/L. The highest concentration of isoprene wasfound 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 studyshows that the shelf seas of China might be an important source of isoprene.

关 键 词：异戊二烯 分布特征 海-气通量 黄海 渤海 

分 类 号：X511[环境科学与工程—环境工程] X55