Kuang Shi, Newchurch Michael J, Burris John, Liu Xiong
Atmospheric Science Department, University of Alabama in Huntsville, Huntsville, Alabama 35805, USA.
Appl Opt. 2013 May 20;52(15):3557-66. doi: 10.1364/AO.52.003557.
Ground-based lidars are suitable for long-term ozone monitoring as a complement to satellite and ozonesonde measurements. However, current ground-based lidars are unable to consistently measure ozone below 500 m above ground level (AGL) due to both engineering issues and high retrieval sensitivity to various measurement errors. In this paper, we present our instrument design, retrieval techniques, and preliminary results that focus on the high-temporal profiling of ozone within the atmospheric boundary layer (ABL) achieved by the addition of an inexpensive and compact mini-receiver to the previous system. For the first time, to the best of our knowledge, the lowest, consistently achievable observation height has been extended down to 125 m AGL for a ground-based ozone lidar system. Both the analysis and preliminary measurements demonstrate that this lidar measures ozone with a precision generally better than ±10% at a temporal resolution of 10 min and a vertical resolution from 150 m at the bottom of the ABL to 550 m at the top. A measurement example from summertime shows that inhomogeneous ozone aloft was affected by both surface emissions and the evolution of ABL structures.
地基激光雷达适合作为卫星和臭氧探空仪测量的补充手段，用于长期臭氧监测。然而，由于工程问题以及对各种测量误差的高反演灵敏度，当前的地基激光雷达无法持续测量地面以上500米以下的臭氧。在本文中，我们展示了我们的仪器设计、反演技术和初步结果，这些都聚焦于通过在先前系统中添加一个廉价且紧凑的微型接收器来实现大气边界层（ABL）内臭氧的高时间分辨率剖面测量。据我们所知，对于地基臭氧激光雷达系统，首次将始终可实现的最低观测高度扩展到了地面以上125米。分析和初步测量均表明，该激光雷达在10分钟的时间分辨率和从ABL底部的150米到顶部的550米的垂直分辨率下，测量臭氧的精度通常优于±10%。夏季的一个测量示例表明，高空不均匀的臭氧受到地表排放和ABL结构演变的共同影响。
