Measurements of Cloud Condensation Nuclei and Cloud Droplet Size Distributions in the Vicinity of Forest Fires
Measurements of Cloud Condensation Nuclei and Cloud Droplet Size Distributions in the Vicinity of Forest Fires
复制标题
森林火灾附近云凝结核和云滴尺寸分布的测量
DOI：
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发表时间：
1974
期刊：
影响因子：
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通讯作者：
L. Radke
中科院分区：
文献类型：
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作者：
R. Eagan;P. Hobbs;L. Radke
摘要对计划焚烧的天然林产品附近的云凝结核(CCN)进行了航空测量。在火灾下风向约38公里处，CCN浓度在0.5%过饱和度时达到峰值，为5000 cm−3，而上风向浓度为250-500 cm−3。据估计，每克木材消耗产生6×1010个CCN。还有一次，在一场天然森林火灾附近测量了小积云的微结构。位于火焰羽流中的两个云中的液滴尺寸分布较窄，液滴浓度高于羽流迎风方向的两个云中的液滴浓度。
Abstract Airborne measurements of cloud condensation nuclei (CCN) were made in the vicinity of a planned burn of natural forest products. The concentrations of CCN, active at 0.5% supersaturation, reached a peak value of 5000 cm−3 about 38 km downwind of the fire, compared to concentrations of 250–500 cm−3 upwind. It is estimated that 6 × 1010 CCN were produced per gram of wood consumed.On another occasion the microstructure of small cumulus clouds were measured in the vicinity of a natural forest fire. The droplet size distributions were narrower and the concentrations of droplets higher in two clouds situated in the plume from the fire than in two clouds upwind of the plume.