Icy wave-cloud lunar corona and cirrus iridescence.
Icy wave-cloud lunar corona and cirrus iridescence.
复制标题
冰冷的波云月冕和卷云虹彩。
DOI：
10.1364/ao.50.0000f6
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发表时间：
2011
期刊：
影响因子：
1.9
通讯作者：
N. Pust
中科院分区：
文献类型：
--
作者：
J. Shaw;N. Pust
双偏振激光雷达数据和无线电探空仪数据被用来确定卷云中的彩虹色和薄波云中的月晕是由微小的冰晶而不是液态水滴引起的。根据照片中记录的日冕衍射环的大小，估计衍射颗粒的平均直径为14.6 μm，比传统的冰晶小得多。彩虹云位于对流层顶[平均海平面以上约11-13.6 km]，温度接近-70 °C，而光学上更纯净的日冕位于平均海平面以上约9.5 km，温度接近-60 °C。激光雷达的交叉偏振比分别为0.5和0.4，证实了冰分别形成了彩虹色和日冕。
Dual-polarization lidar data and radiosonde data are used to determine that iridescence in cirrus and a lunar corona in a thin wave cloud were caused by tiny ice crystals, not droplets of liquid water. The size of the corona diffraction rings recorded in photographs is used to estimate the mean diameter of the diffracting particles to be 14.6 μm, much smaller than conventional ice crystals. The iridescent cloud was located at the tropopause [~11-13.6 km above mean sea level (ASL)] with temperature near -70 °C, while the more optically pure corona was located at approximately 9.5 km ASL with temperature nearing -60 °C. Lidar cross-polarization ratios of 0.5 and 0.4 confirm that ice formed both the iridescence and the corona, respectively.