Raman lidar data from Capel Dewi, May 23 - 30 2016
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These lidar data show the passage of smoke from forest fires in Canada over the lidar site at Capel Dewi near Aberystwyth in Wales. A description of the event is provided in Vaughan et al, Atmos. Chem. Phys., DOI: 10.5194/acp-2017-1181. The files contain the photon-counting signals from the lidar as count-rate*height in km squared (corrected for background and pulse pileup), statistical errors in those signals, and synthetic molecular atmosphere profiles derived from two representative radiosonde stations in the vicinity. The counts have been integrated in time over a night, as follows: May23: 2148 on 23 May to 0309 on 24 May May24: 2126 on 24 May to 2206 on 24 May May26: 2304 on 26 May to 2344 on 26 May May29: 2111 on 29 May to 0331 on 30 May May30: 0036 on 31 May to 0257 on 31 May Cloud prevented night-long observations on these nights - cloud-free profiles were selected and combined by visual examination of the raw data.
本激光雷达(lidar)数据集记录了加拿大林火产生的烟雾流经威尔士阿伯里斯特威斯附近卡佩尔迪韦(Capel Dewi)激光雷达观测站点的全过程。该观测事件的详细说明可参见Vaughan等人发表于《Atmospheric Chemistry and Physics》(简写为Atmos. Chem. Phys.)的研究论文,DOI编号:10.5194/acp-2017-1181。数据文件包含来自该激光雷达的光子计数信号(以计数率×高度的形式呈现,单位为平方千米,已针对背景噪声与脉冲堆积效应进行校正)、上述信号的统计误差,以及由观测站点周边两座代表性无线电探空站(radiosonde)推导得到的合成大气分子廓线。上述计数信号已按夜间观测时段进行时间积分,具体时段如下:5月23日:5月23日21:48至5月24日03:09;5月24日:5月24日21:26至5月24日22:06;5月26日:5月26日23:04至5月26日23:44;5月29日:5月29日21:11至5月30日03:31;5月30日:5月31日00:36至5月31日02:57。需说明的是,上述所有夜间时段均受云层遮挡,无法开展整夜观测——研究人员通过对原始数据的目视筛查,筛选出无云时段的大气廓线并完成整合。



