Upper Troposphere Smoke Injection From Large Areal Fires
Upper Troposphere Smoke Injection From Large Areal Fires
复制标题
大面积火灾对流层上层烟雾喷射
DOI：
10.1029/2020jd034332
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
B. Kosović
中科院分区：
文献类型：
--
作者：
S. Redfern;J. Lundquist;O. B. Toon;D. Muñoz‐Esparza;C. Bardeen;B. Kosović
大面积的火灾，如核爆炸后点燃的火灾，可以将烟雾注入对流层上部和平流层下部。详细的火灾模拟可以评估当地天气如何与这些火灾相互作用，并影响烟雾飘散。在这项研究中，我们采用了天气研究和预报（WRF‐Fire）模型中的火灾模拟包，版本4.0.1，以探索燃烧均匀燃料床的火灾烟雾如何随着两种不同大小的区域火灾的当地风，相对湿度和大气边界层稳定性的变化而变化。水分的存在对结果的影响最大，通过提高放样的高度，而更快的风速抑制放样和降低注射高度。与中性分层条件相比，稳定分层条件抑制羽流传播，尽管稳定性的影响不如水分和风的影响那么强。这些发现强调了在模拟大型火灾时使用适当的大气剖面的重要性，因为当地天气可能对烟雾放样产生有意义的影响。
Large areal fires, such as those ignited following a nuclear detonation, can inject smoke into the upper troposphere and lower stratosphere. Detailed fire simulations allow for assessment of how local weather interacts with these fires and affects smoke lofting. In this study, we employ the fire simulation package in the Weather Research and Forecasting (WRF‐Fire) model, Version 4.0.1, to explore how smoke lofting from a fire burning a homogeneous fuel bed changes with varying local winds, relative humidity, and atmospheric boundary‐layer stability for two different‐sized areal fires. The presence of moisture has the greatest influence on the results by raising the altitude of lofting, while faster wind speeds dampen lofting and lower the injection height. Stably stratified conditions inhibit plume propagation compared with neutrally stratified conditions, although the impact of stability is not as strong as that of moisture and winds. These findings highlight the importance of using an appropriate atmospheric profile when simulating large fires, as the local weather can have a meaningful influence on smoke lofting.
DOI：
10.1073/pnas.1919049117
发表时间：
2020-03-31
影响因子：
11.1
作者：
Jaegermeyr, Jonas;Robock, Alan;Rosenzweig, Cynthia
通讯作者：
Rosenzweig, Cynthia