云碎片对夜间过程驱动的气溶的反应
Geoffrey Pugsley1, Edward Gryspeerdt1, Vishnu Nair1
1Department of Physics, Imperial College London, London, SW7 2BX, United Kingdom.
概括
夜间的过程对层积云部分的气溶影响很大,而白天的过程的影响较小. 气溶白天使云层变薄,但夜间的过程部分抵消了这一点,影响了气候强迫评估.
科学领域:
- 大气科学 大气科学
- 气候科学 气候科学
- 云物理 云物理
背景情况:
- 气溶与云的相互作用是气候强迫的主要不确定性来源.
- 对于气候至关重要的石云受到白天周期的影响,但研究往往忽略了夜间的行为.
- 了解气溶对云碎片和液态水路的影响对于气候建模至关重要.
研究的目的:
- 为了研究云层云中对气溶的云敏感度的日间变化.
- 区分夜间和白天过程在气溶云相互作用中的作用.
- 通过纳入对气溶对云的影响更准确的表示来改进气候模型.
主要方法:
- 利用拉格朗的框架来分析云特性的昼夜变化.
- 描述了云碎片和液态水路对气溶的敏感性.
- 与模型观察数据进行比较,重点关注白天周期表示.
主要成果:
- 云碎片对气溶的反应主要是由夜间过程驱动的.
- 气溶减少白天云的分数,这一效应被夜间过程部分抵消.
- 气溶诱导的降水抑制在夜间是最有效的,与最强的平流体积降水相吻合.
结论:
- 夜间的过程对于确定平流体云的白天演变及其辐射影响至关重要.
- 准确的日间周期表现和夜间观测对于气候强迫评估至关重要.
- 通过突出夜间云动态的重要性,研究结果揭示了海洋云亮化策略的可行性.
更多相关视频
相关概念视频
01:12Precipitation Processes
4.7K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
4.7K
01:18Boundary Layer Characteristics
526
When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
526