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Solar corona caused by juniper pollen in Texas

机译:杜松花粉在德克萨斯州引起的日冕

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Coronas are colorful, concentric rings centered on a bright light such as the Sun, the Moon, or even a streetlamp. Coronas are most commonly caused by water droplets or ice particles of relatively uniform size. Observers in Finland have reported spectacular clear-sky coronas caused by pollen grains. A clear-sky corona in central Texas occurred during the peak of the juniper pollinating season. The aerosol optical thickness at each of three wavelengths was highest when the corona was most prominent. Photographic measurements of the corona infer a particle diameter of~32.4 pμm. Because juniper pollen grains have a diameter of from 22 to 30 μm, they are the aerosol most likely to have caused the corona.# 1998 Optical Society of America OCIS codes: 290.1090, 290.5850, 280.1310, 280.1100, 010.1310.
机译:电晕是五颜六色的同心环,以太阳,月亮甚至路灯等明亮的光为中心。电晕最通常是由大小相对均匀的水滴或冰粒引起的。芬兰的观察员报告说,花粉粒引起了壮观的晴空电晕。杜松授粉季节的高峰期发生在德克萨斯州中部的晴空电晕。当日冕最显着时,三个波长中每个波长的气溶胶光学厚度最高。电晕的照相测量得出的粒径约为32.4pμm。由于杜松花粉颗粒的直径为22至30μm,因此它们是最有可能引起日冕的气溶胶。#1998美国光学学会OCIS代码:290.1090、290.5850、280.1310、280.1100、010.1310。

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