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风速对海洋喷雾气溶尺寸依赖形态和组成的影响

Chamika K Madawala¹, Carolina Molina², Deborah Kim²

¹Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States.

ACS earth & space chemistry

|August 21, 2024

概括

较高的风速改变了海洋喷雾气溶 (SSA) 的形态和组成,从圆形形状转变为核心. 这影响了它们的气候影响,需要在气候模型中考虑风速.

科学领域:

大气化学大气化学
海洋学海洋学海洋学
气候科学气候科学

背景情况:

海喷雾气溶 (SSA) 显著影响气候.
风速是影响SSA形成和属性的关键因素.
了解风速对SSA的影响对于气候建模至关重要.

研究的目的:

为了研究风速对个体新生SSA的尺寸依赖形态和组成的影响.
分析在不同风速条件下 (10米/秒对19米/秒) 从天然海水生成的SSA.
了解SSA特性中的粒子对粒子的变化.

主要方法:

利用风波通道从天然海水中产生SSA.
采用了基于波器的热光学分析,原子力显微镜 (AFM),AFM红外光谱 (AFM-IR) 和扫描电子显微镜 (SEM).
专注于从0.04到1.8微米的SSA大小.

主要成果:

增加的风速减少了SSA的有机质量分数.
形态从10 m/s的主要圆形SSA转移到19 m/s的核心外.
核心SSA在较高的风速显示,与较低的风速相比,中的有氧化有机物更多.

结论:

风速显著影响SSA的形态和组成,可能是由于海面微层的破坏.
在不同风速下观察到的SSA特性变化对于准确的气候影响评估至关重要.
这些发现强调了需要将风力驱动的SSA变化纳入气候模型的必要性.

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