McGraw Robert, Liu Yangang
Environmental Sciences Department, Atmospheric Sciences Division, Brookhaven National Laboratory, Upton, New York 11973, USA.
Phys Rev Lett. 2003 Jan 10;90(1):018501. doi: 10.1103/PhysRevLett.90.018501. Epub 2003 Jan 9.
The kinetic potential of nucleation theory is used to describe droplet growth processes in a cloud. Drizzle formation is identified as a statistical barrier-crossing phenomenon that transforms cloud droplets to drizzle size with a rate dependent on turbulent diffusion, droplet collection, and size distribution. Steady-state and transient drizzle rates are calculated for typical cloud conditions. We find drizzle more likely under transient conditions. The model quantifies an important indirect effect of aerosols on climate-drizzle suppression in clouds of higher droplet concentration.
成核理论的动力学势被用于描述云中的液滴增长过程。毛毛雨的形成被视为一种统计性的跨越障碍现象，它将云滴转变为毛毛雨大小，其速率取决于湍流扩散、液滴收集和尺寸分布。针对典型的云况计算了稳态和瞬态毛毛雨速率。我们发现，在瞬态条件下更容易形成毛毛雨。该模型量化了气溶胶对高液滴浓度云层中气候毛毛雨抑制的重要间接影响。
