大面积火灾的高层大气烟气喷射
Upper Atmosphere Smoke Injection from Large Areal Fires
摘要：
大型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，我们采用的火灾模拟包的天气研究和预报模型（WRF火灾），版本4.0.1，探讨如何从火灾燃烧均匀的燃料床的烟雾放样变化与当地不同的风，相对湿度，和大气边界层稳定性两个不同大小的区域火灾。我们发现，水分的存在有最大的影响，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的结果。与中性分层条件相比，稳定分层条件进一步抑制羽流传播。
英文摘要：
Large fires 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 model (WRF-Fire), 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. We find that the presence of moisture has the greatest influence on the results by raising the altitude of lofting, while faster winds speeds dampen lofting and lower the injection height. Stably stratified conditions further inhibit plume propagation compared with neutrally stratified conditions.
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