海洋学研究 ›› 2014, Vol. 32 ›› Issue (1): 98-106.DOI: 10.3969/j.issn.1001-909X.2014.01.012

• 研究报道 • 上一篇    

长江口及邻近海域表层海水硅酸盐混合模式的初步研究

杜锦1, 石晓勇1,2, 李宏亮3,4, 卢勇3,4, 陈鹏5, 张传松*1   

  1. 1.中国海洋大学 化学化工学院, 山东 青岛 266100;
    2.国家海洋局 海洋减灾中心,北京 100194;
    3.国家海洋局海洋生态系统与生物地球化学重点实验室,浙江 杭州 310012;
    4.国家海洋局 第二海洋研究所,浙江 杭州 310012;
    5.山东烟台赫尔曼格迈纳尔中学,山东 烟台 265500
  • 收稿日期:2013-07-14 修回日期:2013-10-20 出版日期:2014-03-15 发布日期:2022-11-25
  • 通讯作者: *张传松,博士,E-mail:zcsong@ouc.edu.cn
  • 作者简介:杜锦(1988-),女,山东泰安市人,主要从事海水分析化学与海洋生物地球化学方面的研究。E-mail: du2007@sina.cn
  • 基金资助:
    国家重点基础研究发展计划项目资助(2010CB428701)

A preliminary study on the mixed model of SiO3-Si in surfacewater around the Changjiang River Estuary

DU Jin1, SHI Xiao-yong1,2, LI Hong-liang3,4, LU Yong3,4, CHEN Peng5, ZHANG Chuan-song*1   

  1. 1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;
    2. National Marine Hazard Mitigation Service, SOA, Beijing 100194, China;
    3. Laboratory of Marine Ecosystem and Biogeochemistry, SOA, Hangzhou 310012, China;
    4. The Second Institute of Oceanography, SOA, Hangzhou 310012, China;
    5. Hermann Gmeiner School, YanTai 265500, China
  • Received:2013-07-14 Revised:2013-10-20 Online:2014-03-15 Published:2022-11-25

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摘要： 根据2006年7月—2007年12月,对长江口及邻近海域春、夏、秋和冬季4个航次的现场调查数据,对硅酸盐(SiO3-Si)在长江口及邻近海域表层海水的混合模式及影响因素进行初步探讨。结果表明:(1)该海域表层海水SiO3-Si浓度四季均与盐度(S)相关性较好,秋、冬季稀释模式与理论稀释线(TDL)相符,春、夏季因生物作用、悬浮颗粒物解析和沉积物再溶作用的影响,稀释模式与TDL线存在差异。(2)长江口及邻近海域S<18海域,表层海水四季SiO3-Si浓度随温度升高略有上升,可能是由于悬浮颗粒物中SiO3-Si的解析量和沉积物的再溶增加;pH值为7.7~7.9时,SiO3-Si浓度基本不变,pH值为7.9~8.2时SiO3-Si浓度随pH升高而降低,主要受物理混合作用影响;SiO3-Si浓度与溶解氧(DO)含量无明显相关关系。(3)长江口及邻近海域S>18海域表层海水,长江口和杭州湾SiO3-Si含量相对较高,除上述2个高硅区域外,四季在5~32 ℃温度范围内,SiO3-Si浓度均低于20 μmol/L,且相差不大;春、夏季受生物作用和物理混合作用共同影响,秋、冬季受物理混合作用影响,pH值为7.9~8.3时SiO3-Si浓度随pH升高逐渐降低,pH大于8.3时SiO3-Si浓度基本不变;春、夏季主要受生物作用影响,SiO3-Si浓度与DO含量呈负相关,秋、冬季因物理混合作用影响呈正相关。

关键词: 硅酸盐(SiO3-Si), 长江口, 混合模式, 盐度, 溶解氧

Abstract: Based on the data obtained from the observation from July 2006 to December 2007, The SiO3-Si dilution and its relationship with environmental factors in surface water around the Changjiang River Estuary were primarily analysed. Field investigation showed: (1)SiO3-Si concentration in surface water around the Changjiang River Estuary had a good correlation with salinity in autumn and winter, which was mainly affected by physical mixed effect. There were some differences in spring and summer, which was mainly affected by biological effect, suspended particle matter and sediment. (2)In the surface water around the Changjiang River Estuary and adjacent area with salinity from 0 to 18, SiO3-Si concentration slightly increased with temperature increasing, which was mainly affected by suspended particle matter and sediment. SiO3-Si concentration basically unchanged with pH from 7.7 to 7.9, but decreased with pH from 7.9 to 8.2, which was mainly affected by physical mixed effect. SiO3-Si concentration basically unchanged when DO changed. (3)In the surface water around the Changjiang River Estuary and adjacent area with salinity from 18 to 33, SiO3-Si concentration was high in the Changjiang River Estuary and Hangzhou Bay, but was under 20 μmol/L in other area. Since the SiO3-Si concentration was mainly affected by biological and physical mixed in spring and summer, physical mixed in autumn and winter, it decreased with pH from 7.9 to 8.3. Also the same reason, a negative correlation between SiO3-Si concentration and DO in spring and summer while a positive correlation in autumn and winter were appeared.

Key words: SiO3-Si, the Changjiang River Estuary, mixed model, salinity, dissolved oxygen

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