利用船载单颗粒气溶胶质谱仪(SPAMS)对西太平洋海盐气溶胶的化学组成及粒径分布进行研究,分析了SPAMS在海盐气溶胶的检测特性,研究海盐粒子的生成过程及影响因素。结果表明:西太平洋上空细颗粒的空间分布与海盐粒子的分布基本一致,表明海盐粒子对海洋上空的气溶胶起主导作用。海盐粒子的颗粒数浓度分布与海洋表面风速的空间分布一致。Mg+,Na+和Ca+主要来自于海洋源,这几种元素在谱图中具有较强的谱峰强度。硫酸盐气溶胶主要分布在细颗粒粒径段,其中亚微米级细颗粒占总颗粒数的60%以上。钠离子呈现两头高、中间低,主要受不同产生机制的影响,氯和钙颗粒具有较一致的分布特征,主要集中在大粒径段。单颗粒气溶胶质谱在对海盐粒子的检测上与城市气溶胶的粒子检测的打击率具有很大差异。 The chemical compositions and size distribution of sea spray aerosols over West Pacific Ocean were determined by Signal particle aerosol mass spectrometer (SPAMS). The detection properties of sea salt aerosols using SPAMS were presented. The formation of sea salt aerosols and its impact factor were also investigated. The results show that the spatial distribution of sea salt particles was consistent with the total particles in the West Pacific Ocean, indicating that sea salt aerosols were the dominant sources of the aerosol particles in marine atmosphere. Sea salt aerosols were associated with the wind speed. High intensity signals of Mg+, Na+ and Ca+ were observed in the positive mass spectrum, which were considered to be derived from marine sources. HSO4− particles were mainly concentrated on submicron size, accounting for more than 60% of the total particles. However, high Na relative fractions were observed both in small and large size. The size distribution of Ca+ particles was similar with the Cl− particles, which were mainly concentrated on large particles. The hit rate of sea salt aerosols was very different from the urban aerosol particles hit rate using the determination of SPAMS.
海盐颗粒,化学组成分布,粒径分布,单颗粒气溶胶飞行时间质谱仪, Sea Salt Aerosol Chemical Compositions Distribution Size Distribution Single Particle Aerosol Mass Spectrometer (SPAMS)基于船载单颗粒气溶胶质谱的海盐颗粒特征 研究
徐 华,颜金培,林 奇,黄 奖. 基于船载单颗粒气溶胶质谱的海盐颗粒特征研究 Study of Sea Salt Aerosol Characteristics Using an On-Board Single Particle Aerosol Mass Spectrometer[J]. 海洋科学前沿, 2019, 06(01): 11-18. https://doi.org/10.12677/AMS.2019.61002
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