李亚男,陈洪涛,谷文艳,王国善,矫恒晨,祝陈坚

• 1:中国海洋大学化学化工学院

摘要(Abstract)：

2015年12月在马里亚纳海沟"挑战者深渊"进行了定点样品采集,对温度、盐度、溶解氧、pH等环境参数进行了分析,讨论了营养盐的垂直分布特征、各形态营养盐结构特征及影响因素。研究发现,溶解氧在表层具有最大值,在1 000 m左右出现极小值,而在8 700 m深度具有较高溶解氧值(5.79 mg·L~(-1)),这可能与富氧水团的存在有关。硝酸盐表层含量较低,在1 000和5 367 m处出现双峰值。在表层水体中,溶解有机氮、磷是溶解总氮、溶解总磷的主要存在形式,表层以深,溶解无机氮、磷逐渐占据主导地位。磷酸盐表层含量最低,在1 000 m处达到最大值,之后随着深度的增加浓度逐渐降低;硅酸盐在表层含量较低,在约4 000 m处有最大值161.65μmol·L~(-1),在4 000 m以深,硅酸盐仍维持较高浓度。结果表明马里亚纳海沟"挑战者深渊"的溶解氧、pH及营养盐的垂直分布特征与大洋环流、海沟形态以及生物活动密切相关。

关键词(KeyWords)： 马里亚纳海沟;挑战者深渊;溶解氧;营养盐;垂直分布

Abstract:

Keywords:

基金项目(Foundation): “全球变化与海气相互作用”专项项目(GASI-02-PAC-ST-MSwin)资助~~

作者(Author): 李亚男,陈洪涛,谷文艳,王国善,矫恒晨,祝陈坚

DOI: 10.16441/j.cnki.hdxb.20190024

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