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首页> 外文期刊>Journal of Applied Meteorology and Climatology >Effects of Moisture Released during Forest Burning on Fog Formation and Implications for Visibility
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Effects of Moisture Released during Forest Burning on Fog Formation and Implications for Visibility

机译：森林燃烧过程中释放的水分对雾形成的影响及其能见度

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Smoke from wildland burning in association with fog has been implicated as a visibility hazard over roadways in the United States. Visibilities at accident sites have been estimated in the range from 1 to 3 m (extinction coefficients between 1000 and4000). Temperature and relative humidity measurements were taken from 29 “smokes” during 2002 and 2003. These data were converted to a measure of the mass of water vapor present to the mass of dry air containing the vapor (smoke mixing ratio). Smoke temperatures were processed through a simple radiation model before smokes were mixed with ambient air with temperature and moisture observed during the early morning on the days following the burns. Calculations show supersaturations implying liquid water contents (LWC) up to 17 times as large as LWC found in natural fog. Simple models combining fog droplet number density, droplet size, and LWC show that the supersaturation LWC of smokes is capable of reducing visibility to the ranges observed.
机译：在美国，与雾相关的荒野燃烧产生的烟雾被认为是对道路的可见性危害。事故现场的能见度估计为1至3 m（消光系数在1000至4000之间）。温度和相对湿度的测量值是从2002年和2003年的29次“烟雾”中获得的。这些数据被转换为水蒸气质量与含有水蒸气的干燥空气质量（烟气混合比）的量度。通过简单的辐射模型处理烟雾温度，然后将烟雾与周围空气混合，并在烧伤后的第二天清晨观察到温度和湿度。计算表明，过饱和度意味着液态水含量（LWC）高达自然雾中LWC的17倍。结合了雾滴数密度，雾滴大小和LWC的简单模型显示，烟雾的过饱和LWC能够将可见度降低到所观察到的范围。

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