Physical characteristics of arctic stratus clouds
Physical characteristics of arctic stratus clouds
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北极层云的物理特征
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
K. Jayaweera
中科院分区：
文献类型：
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作者：
S. Tsay;K. Jayaweera
1980年6月，用美国国家大气研究中心的伊莱克特拉飞机对博福特海域上空的北极状态云（ASC）的物理性质进行了观测。在这些实验中观察到的云形态和微观结构在这里进行了描述。北极层云在各种气象条件下形成，但不是当博福特海脊的轴是纬向的，进入该地区的气流是大陆性的。在所有条件下观测到的云中的平均水滴直径保持在10 μm附近，而平均液态水含量（LWC）是形成云的气团的特征，基本上由平均水滴浓度决定。云显示出相当大的水平均匀性，但显着的垂直变化发生在他们。LWC的垂直分布表明，该值一般随高度增加，作为一个结果，在液滴的大小，而不是浓度的增加。底部附近的液滴粒径分布为单峰分布，具有冷凝的特征。
Abstract Observations of the physical properties of Arctic status clouds (ASC) over the Beaufort Sea area were made by the NCAR Electra aircraft during June 1980. The cloud morphology and microstructure observed during these experiments are described here. Arctic stratus clouds were formed under various meteorological conditions, but not when the axis of the Beaufort Sea ridge was zonal and the airflow into the region was continental. The mean drop diameter in clouds observed under all conditions remained near 10 μm, while the mean liquid water content (LWC) was characteristic of the air mass forming the clouds and essentially determined by the mean drop concentration. Clouds showed considerable horizontal homogeneity but significant vertical changes occurred within them. The vertical profiles of LWC show that the values generally increased with height, as a result of an increase in droplet size rather than concentration. The drop size distribution near the base was monomodal, characteristic of condensati...