潮水影响下苏北海岸带盐沼DMS通量变化特征研究

发布时间：2018-01-08 00:26

本文关键词：潮水影响下苏北海岸带盐沼DMS通量变化特征研究　出处：《海洋湖沼通报》2016年06期 　论文类型：期刊论文

【摘要】：海岸带盐沼是全球生物地球化学循环的重要的一环,对全球气候变化也产生深远影响。2013年7月(生长季)和2013年12月(非生长季)在中国江苏省盐城海岸带盐沼湿地采用静态箱技术原位测定DMS的通量。结果表明,盐城海岸带盐沼湿地整体上表现为DMS的源。植被带及光滩上,互花米草带具有最高的DMS排放率38.06±8.97mg·m~(-2)·d~(-1);距离潮沟远近上,潮沟内DMS通量0.35±0.11mg·m~(-2)·d~(-1)远小于近潮沟10.30±5.09mg·m~(-2)·d~(-1)与远潮沟9.57±4.04mg·m~(-2)·d~(-1)DMS通量;非生长季DMS通量14.31±5.80mg·m~(-2)·d~(-1)高于生长季的DMS通量5.56±2.63mg·m~(-2)·d~(-1)。地上植被及其残留根系、潮水的周期性变化均影响DMS的通量大小。
[Abstract]:Coastal salt marsh is an important part of the global biogeochemical cycle. Also has far-reaching implications for global climate change. July 2013 (growth season) and December 2013 (non-growth season). The DMS fluxes of salt marsh wetland in Yancheng coastal zone of Jiangsu Province were measured by static tank technique in situ. The salt marsh wetland in Yancheng coastal zone is the source of DMS. The highest DMS emission rate of Spartina alterniflora was 38.06 卤8.97mg 路mc-2). Up close to the trench. The flux of DMS in the trench was 0.35 卤0.11mg 路mANG-2) 路dan-1), which was much lower than that in the near trench (10.30 卤5.09mg 路mANG-2) 路dANG-1). And DMS flux of 9.57 卤4.04 mg 路m ~ (-2) 路d ~ (-1) ~ (-1) in the far tidal trench; The DMS flux in the non-growth season was 14.31 卤5.80mg 路mANG-2) 路dANG-1), which was higher than that in the growing season (5.56 卤2.63mg 路mP-1). -1. Aboveground vegetation and its residual roots. The periodic variation of tide affects the flux of DMS.
【作者单位】：江苏师范大学城市与环境学院;
【基金】：国家自然科学基金项目(41271122和31100361) 江苏师范大学研究生科研创新计划一般项目(2015YYB039)资助
【分类号】：X145
【正文快照】： 引言二甲基硫(Dimethyl sulfide,以下简称DMS),是1种挥发性有机硫化物(Volatile organic sulfurcompounds,VOSCs)。DMS的释放在大气中形成的氧化产物具有较强的酸性,对天然沉降物的酸性产生影响。此外,DMS氧化生成的硫酸盐气溶胶能够增加海洋大气中的云凝结核,对全球气候变化

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