黄海-西北太平洋表层海水Hg的形态研究

发布时间：2018-04-30 01:15

本文选题：黄海-西北太平洋 + THg　；参考：《海洋环境科学》2017年03期

【摘要】：于2015年3月29日至5月6日乘东方红2号从青岛前往西北太平洋,采用现场测定与室内分析结合的方法分析了黄海到西北太平海域表层海水中Hg形态及分布特征,以认识黄海到西北太平洋海水Hg的含量及区域Hg的迁移。黄海-西北太平洋表层海水中总汞(THg,total mercury)变化范围为0.11~2.50 ng/L,平均为0.75±0.51 ng/L,THg的含量呈近海高大洋低;表层海水中活性汞(RHg,reactive mercury)范围为0.10~1.45 ng/L,平均为0.33±0.24 ng/L,RHg/THg平均为48.4%,海水中RHg与水温呈显著性正相关(r=0.494*,P=0.045);表层海水中溶解性气态汞(DGM,dissolved gaseous mercury)的含量为11.7~105.7 pg/L,平均浓度39.6±22.9 pg/L。海水中DGM与气温呈显著正相关(r=0.633*,P=0.011),与风速呈显著负相关关系(r=-0.660**,P=0.006)。从黄海到西北太平洋DGM含量逐渐升高,其日变化呈现白天高夜晚低的趋势,主要受光照的影响。
[Abstract]:From March 29 to May 6, 2015, taking Dongfanghong No. 2 from Qingdao to the Northwest Pacific Ocean, the morphology and distribution of Hg in the surface sea water from Huang Hai to the Northwest Pacific Ocean were analyzed by the method of field measurement and indoor analysis. In order to understand the content of Hg from Huang Hai to the Northwest Pacific Ocean and the transport of Hg in the region. The variation range of total mercuryin the surface water of Huang Hai is 0.11 ~ 2.50 ng / L, the average is 0.75 卤0.51 ng / L ~ (-1). The range of reactive activity in surface seawater is 0.10ng / L, the average is 0.33 卤0.24ng / L, the average RHg / THg is 48.4. There is a significant positive correlation between RHg and water temperature (P 0.0455.The content of dissolved gaseous in surface seawater is 11.7105.7 PG / L, the average concentration is 39.6 卤22.9 PG / L). There was a significant positive correlation between DGM and air temperature, and a significant negative correlation between DGM and wind speed. From Huang Hai to the Northwest Pacific, the DGM content increased gradually, and the diurnal variation showed a trend of high daytime and low night, which was mainly affected by light.
【作者单位】：中国海洋大学环境科学与工程学院;中国海洋大学海洋环境与生态教育部重点实验室;
【基金】：国家自然科学基金项目(41506128):“光照下近海表层海水中溶解气态汞产生的主要制约因素研究” 973国家重点基础研究发展计划项目(2014CB953700):“大气物质沉降对海洋氮循环与初级生产过程的影响及气候效应”
【分类号】：P734;X55

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