论文标题
沃尔代面气溶胶的高度和粒度测量基于暮光天空偏振
Post-Volcanic Aerosol Altitude and Particle Size Measurements Basing on Twilight Sky Polarimetry
论文作者
论文摘要
在2019年夏季的Raikoke火山爆发可能引起的“紫色灯光”时期，对暮光天空的背景强度和极化的测量进行了测量。天空亮度的增加与极化下降的增加是注册的，尤其是在Dusk segment中引人注目的。使用先前工作中开发的技术，发现海拔分布和其他气溶胶的平均粒径。对于背景或中度喷发条件，（0.11微米）的平均半径是典型的，但是，气溶胶大多在对流层和对流层面而不是在平流层中观察到。十年前的纬度火山爆发（例如Kasatochi火山喷发）之后的现有气溶胶数据的比较显示出类似的特性，可以用作确认2019年的“紫色灯”事件是火山性质。
Measurements of the background intensity and polarization of the twilight sky were conducted during the "purple lights" epoch that was potentially caused by the Raikoke volcano eruption in the summer of 2019. An increase in sky brightness paired with a decrease in polarization was registered, especially noticeable in the dusk segment. Using techniques developed in previous works, altitude distribution and the mean particle size of additional aerosol was found. The mean radius of (0.11 micrometers) is typical for background or moderate eruption conditions, however, aerosols were mostly observed in the upper troposphere and near the tropopause rather than in the stratosphere. A comparison with existing aerosol data after mid-latitude eruptions like the Kasatochi volcano eruption one decade ago showed similar properties, which can be used as confirmation that the "purple lights" event in 2019 was of volcanic nature.
