中文摘要：

一台用于观测对流层和平流层风场的车载瑞利测风激光雷达于安徽合肥建成,该雷达使用双边缘技术,设计探测高度10~40 km,距离分辨率分别为100 m（20 km高度以下）和500 m（20 km高度以上）。在2011年夏季该雷达于新疆乌鲁木齐地区（42.1°N,87.1°E）进行了风场观测实验并成功观测到了平流层准零风层大气结构,给出了几组夜间典型的风场数据,根据观测结果得出：准零风层底部高度稳定在17~18 km高度而不随时间变化,而准零风层厚度则随时间有一个先增大后减小的趋势,并在北京时间凌晨0点~3点期间达到最大值。在观测中出现的准零风层厚度最大值超过15 km,最小值则仅有约2~3 km。分析认为：准零风层厚度的变化与夜间平流层接收到的紫外线辐射强度变化有关,同一时刻不同纬度上的平流层接收的紫外线辐射强度变化程度不同,导致平流层温度梯度继而大气环流的速度发生变化,从而引起准零风层厚度变化。

英文摘要：

In order to measure wind field of troposphere and stratosphere, a mobile Rayleigh Doppler wind lidar based on Double-edge technology was developed in Hefei, China. The detection range of the lidar is designed to cover altitudes from 10 km to 40 km with height resolution of 100 m（below 20 km）and 500 m（above 20 km）. In the summer of 2011, wind field measurements were carried out in Urumqi（42.1° N, 87.1° E）, the stratospheric quasi-zero wind layer, where wind velocity is almost 0 m/s, was successfully observed. Some typical results of the wind field at night were given. The quasi-zero wind layer′ s bottom was found stabled at about 17-18 km height. However, the thickness of the quasi-zero wind layer would increase with time until about 0-3 a.m. Beijing time, gaining its maximum, and then decrease. The maximum thickness could be more than 15 km and minimum thickness just 2-3 km according to the author′ s measurements. This phenomenon could be a result of change of the ultraviolet radiation′ s intensity emitted to the stratosphere at night. The decrease and increase of the ultraviolet radiation′s intensity were different at different latitude at the same time, and that would lead to a change of temperature gradient in the stratosphere, which was pointed from lower latitudes to higher latitudes.Then the temperature gradient passes the affection to the stratosphere circulation, which was part of the quasi-zero wind layer, and eventually leads to this regular increase-decrease change.