在东地中海云层的冰核粒子日间变化的驱动因素上
Kunfeng Gao1,2, Franziska Vogel3,4, Romanos Foskinis1,5,6
1Laboratory of Atmospheric Processes and Their Impacts, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
概括
生物粒子驱动云中的每日冰核粒子 (INP) 循环,夜间尘埃起作用. 模型可能忽略了这些关键的生物气溶和尘埃对山区降水的影响.
科学领域:
- 大气科学 大气科学
- 云物理 云物理
- 气溶科学 气溶科学
背景情况:
- 冰核粒子 (INP) 对于混合相云的云形成和降水至关重要.
- 了解INP的变化是改善气候和天气模型的关键.
研究的目的:
- 确定在约-25°C的地中海东部地形云中INP空间时间变化的主要驱动因素.
- 为了研究INP在行星边界层和自由热层中的日间模式.
主要方法:
- 对尺寸分辨率和光差异化的气溶特性进行分析.
- 气溶特性与INP测量的比较.
- 评估生物颗粒,尘埃和生物质燃烧气溶的影响.
主要成果:
- 在行星边界层中明显的日间INP周期性,主要由生物颗粒和次要的尘埃驱动.
- 撒哈拉沙漠的尘埃增加了夜间的INP比白天的INP更多,这是由于下边界层的高度.
- 在自由热带层中没有白天INP周期性,尽管受到生物气溶和尘埃可用性的影响.
结论:
- 光生物气溶是INP变化的主要驱动因素,在研究的形云中.
- INP的日间循环,特别是由生物气溶驱动的,是云形成和降水的重要因素.
- 目前的模型可能低估了生物气溶和尘埃在云层过程中的作用,特别是在山区.
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