胶州湾表层海水NO的分布特征及其影响因素

发布时间：2018-01-06 19:04

本文关键词：胶州湾表层海水NO的分布特征及其影响因素　出处：《环境科学研究》2016年10期 　论文类型：期刊论文

【摘要】：为了解近海海水中NO的时空分布特征及其影响因素,采用化学发光法对2010—2011年胶州湾内表层海水中的c(NO)进行了观测,并结合水文、生物等要素的同步观测资料,探讨了该海域NO分布特征及影响因素.结果表明:胶州湾内表层海水c(NO)春季最低,为(11.8±4.6)pmol/L;秋季最高,为(471.3±106.3)pmol/L;夏季和冬季差别不大.该海域c(NO)的水平分布呈湾中心及湾口部分较低、河口较高的特点.湾口部分c(NO)春季最低,为2.0 pmol/L;湾中心部分c(NO)秋季最高,达356.0pmol/L.c(NO)与温度、盐度及c(NO_2-)表现出相关性,陆地径流输入对海水中NO的分布也有影响,大沽河下游丰水季c(NO)达到348.1 pmol/L,枯水季c(NO)仅为119.8 pmol/L.研究显示,胶州湾表层海水为大气NO的源,2010—2011年胶州湾表层海水NO的海-气通量为3.8×10-15mol/(cm~2·s),胶州湾年NO释放量(以N计)约为5.8×106g.
[Abstract]:In order to understand the temporal and spatial distribution of no in offshore seawater and its influencing factors, the cno in the surface water of Jiaozhou Bay from 2010 to 2011 was observed by chemiluminescence method and combined with hydrology. The distribution characteristics and influencing factors of no in Jiaozhou Bay are discussed. The results show that the surface water in Jiaozhou Bay is the lowest in spring. 11.8 卤4.6 pmol / L; The highest in autumn was 471.3 卤106.3 pmol / L; In summer and winter, there was no significant difference between summer and winter. The horizontal distribution of CCN in the sea area was lower in the center and mouth of the bay, and higher in the estuary. The lowest level was 2.0 pmol / L in spring in the estuary. In autumn, cnno in the central part of the bay was the highest, reaching 356.0 pmol / L ~ (cno)), which was correlated with temperature, salinity and cno _ 2 ~ (2). Land runoff input also affected the distribution of no in seawater, and the concentration of no in the lower reaches of Dagu River reached 348.1 pmol/L. The results show that the surface water of Jiaozhou Bay is the source of atmospheric no. The sea-air flux of no in the surface water of Jiaozhou Bay is 3.8 脳 10 ~ (-15) mol / m ~ (-1) cm ~ (2 路s). In Jiaozhou Bay, the annual no release (expressed as N) is about 5.8 脳 10 ~ (6) g.
【作者单位】：中国海洋大学海洋化学理论与工程技术教育部重点实验室;中国海洋大学化学化工学院;
【分类号】：X508
【正文快照】： NO是一种小分子气体自由基,广泛存在于动物、植物和微生物等生物有机体中,在生物体中扮演重要角色[1-3],并且参与陆地和海洋生态系统中的生命和非生命过程[4-5],进而参与生态系统内的氮循环过程[6-10].虽然在海洋和大气中NO的含量较低,但是目前关于海洋中NO的研究较多[11],如

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