Examination of effects of aerosols on a pyroCb and their dependence on fire intensity and aerosol perturbation
Examination of effects of aerosols on a pyroCb and their dependence on fire intensity and aerosol perturbation
复制标题
检查气溶胶对 PyroCb 的影响及其对火灾强度和气溶胶扰动的依赖性
DOI：
10.5194/acp-20-3357-2020
复制
发表时间：
2020
影响因子：
6.3
通讯作者：
W. Choi
中科院分区：
文献类型：
--
作者：
Seoung;G. Kablick;G. Kablick;Zhanqing Li;C. Jung;Yong;J. Um;W. Choi
抽象的。使用一个建模框架，这项研究调查了一条焦粒雨云如何
(PyroCb)事件影响水汽浓度和卷云
对流层顶附近的属性，特别关注如何产生火
气雾剂会影响这一角色。案例研究的结果表明，当观察到
火灾强度高，产生的火灾影响不大
气溶胶对焦碳化合物的形成和水中相关变化的影响
对流层顶附近的水汽和卷云。然而，随着火灾强度的增加，
这些气溶胶对微物理变量和过程的减弱和影响
如液滴大小和自动转化率增加。正因如此，
气溶胶诱导的对流增强对具有
弱强度火灾和与之相关的弱表面热通量。这导致了
有更大的气溶胶效应的一种情况
对流层上部的水汽和卷云的产生
使用弱强度的火焰，而这种效果会被
强烈的火灾。
Abstract. Using a modeling framework, this study investigates how a pyrocumulonimbus
(pyroCb) event influences water vapor concentrations and cirrus-cloud
properties near the tropopause, specifically focusing on how fire-produced
aerosols affect this role. Results from a case study show that when observed
fire intensity is high, there is an insignificant impact of fire-produced
aerosols on the development of the pyroCb and associated changes in water
vapor and cirrus clouds near the tropopause. However, as fire intensity
weakens, effects of those aerosols on microphysical variables and processes
such as droplet size and autoconversion increase. Due to this,
aerosol-induced invigoration of convection is significant for pyroCb with
weak-intensity fires and associated weak surface heat fluxes. This leads to
a situation where there is a greater aerosol effect on the transport of
water vapor to the upper troposphere and the production of cirrus clouds
with weak-intensity fires, whereas this effect is muted with
strong-intensity fires.