我国中纬度地区多普勒激光雷达准零风层多季节观测与分析

一台基于分子双边缘鉴频技术的车载瑞利多普勒激光雷达系统,于2014年至2016年先后在山西忻州(38.42°N 112.72°E)和甘肃酒泉(39.74°N 98.49°E)地区对平流层风场进行连续观测。观测结果表明:18~25 km范围内,酒泉春、秋季节以及忻州冬季均出现了准零风层大气结构,并伴有明显的上下浮动现象,该准零风层结构与2011年夏季新疆乌鲁木齐(42.1°N 87.1°E)多普勒激光雷达系统观测到的结果具有明显差异。分析认为:由于5月与10月处于短暂的季节过渡时期,中纬度地区平流层东风环流尚未稳定导致零风线的上下浮动;2015年1月忻州地区出现平流层准零风层与平流层爆发性增温有关。

Multi-season observation and analysis of quasi-zero wind layer based on Doppler lidar in middle latitudes of China

A mobile Rayleigh Doppler lidar system based on molecular double-edge technique, it was applied to Shanxi Xinzhou (38.42°N 112.72°E) and Gansu Jiuquan (39.74°N 98.49°E) continuous observations of stratospheric wind from 2014 to 2016. The wind data analysis results shows that: During the observation period, within the range of 18-25 km, the atmospheric structure of quasi-zero wind layer appeared in Jiuquan spring, autumn season and Xinzhou winter, and there was a phenomenon of floating up and down. The observed results are obviously different from the quasi-zero wind layer observed in Urumqi (42.1 °N 87.1 °E) in summer 2011. The analysis is that the stratospheric easterly circulation in the mid-latitude region of the mid-latitude region has not been stable and the zero-wind line is floating up and down due to the short-season transition period in May and October, and the stratospheric quasi-zero wind layer in the region of January 2015 may be related to the explosive temperature rise of the stratosphere.