祁建华,王玉珏,刁明亚,景瑞瑛,孙芃

• 1:中国海洋大学海洋环境与生态教育部重点实验室

摘要(Abstract)：

本文于2011年8月连续采集了青岛近岸大气气溶胶TSP(总悬浮颗粒物)样品,运用离子色谱法(IC)测定了可溶性无机氮磷组分的浓度,并估算了其干沉降通量,分析了天气过程对无机氮磷浓度的影响,讨论了大气干沉降对黄海初级生产力的影响。结果表明,夏季青岛沿海地区气溶胶颗粒物、NH+4-N、NO-3-N的平均浓度分别为139.96、9.70、3.08μg/m3,NO-2-N和PO3-4浓度很低,分别在0.15和1.00μg/m3以下;NH+4-N含量约为NO-3-N的3倍,二者之和占总无机氮的99%以上。天气过程显著影响颗粒物及无机氮的浓度和组成,雾天时,颗粒物、NH+4-N、NO-3-N的浓度分别升高到晴天时的1.48、1.98和2.21倍,大风天气下分别为晴天时的1.85、2.84和4.50倍;降雨对气溶胶存在明显的清除作用,对颗粒物和无机氮的清除率分别为7.70%~32.97%和54.16%~64.49%。气象要素和气团来源、路径对气溶胶浓度和组成的影响也十分显著。颗粒态无机氮磷的沉降通量分别为0.55和96.14μg/(m2·d),输入黄海后可产生94.51~138.30mg/(m2·month)的新生产力,对总初级生产力的贡献不大,但特殊天气下大气干沉降引起的新生产力可以在短时间内迅速增加。颗粒态无机氮磷的沉降通量之比为13.7,沉降后不会使黄海磷限制的营养盐结构产生明显变化。

关键词(KeyWords)： 气溶胶;无机氮;无机磷;天气过程;初级生产力

Abstract:

Keywords:

基金项目(Foundation): 中日国际合作项目(2010DFA91350);; 国家自然科学基金项目(40705047);; 国家大学生创新性实验计划项目(201110423015)资助

作者(Author): 祁建华,王玉珏,刁明亚,景瑞瑛,孙芃

DOI: 10.16441/j.cnki.hdxb.2013.10.013

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