Abstract

Lidar observations at Siberian Lidar Station (SLS) of the Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, in Tomsk (56.5° N; 85.0° E) showed the presence of stratospheric aerosol layers, descent of air masses, and deficit of ozone over the city during winter 2017–2018. Aura OMI/MLS data indicated that the total ozone (TO) content and NO₂ content in the stratosphere over northern Eurasia, as well as the temperature in the stratosphere, were significantly lower than normal in December 2017–January 2018. Analysis of back trajectories and integrated (over profile) TO showed that the dynamic disturbance of the Arctic stratosphere in December 2017 led to the extrusion of cold air masses with excessive reactive chlorine content (in view of NO₂ deficit) beyond the Arctic circle and their intrusion into the stratosphere of Tomsk. Seemingly, they were exposed to solar radiation in the stratosphere over Tomsk and, staying spatially isolated, became chemically disturbed. This state is similar to the state of the springtime Arctic stratosphere, where ozone is intensely destroyed until the final warming.

中文翻译：

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利用激光雷达和Aura MLS / OMI观测，2017/2018年冬季托木斯克平流层扰动

摘要

俄罗斯科学院西伯利亚分校大气光学研究所的西伯利亚激光雷达站（SLS）的激光雷达观测在托木斯克（56.5°N; 85.0°E），显示存在平流层气溶胶层，空气质量下降和赤字2017-2018年冬季，该城市的臭氧排放量。Aura OMI / MLS数据表明，2017年12月至2018年1月，欧亚大陆北部平流层的总臭氧（TO）含量和NO ₂含量以及平流层的温度均明显低于正常水平。反向轨迹分析以及综合（概况）TO显示，2017年12月北极平流层的动态扰动导致冷空气团块挤出，其中的反应性氯含量过高（鉴于NO ₂赤字），并侵入了托木斯克的平流层。貌似，它们在托木斯克的平流层中暴露于太阳辐射下，并在空间上保持隔离，受到了化学干扰。此状态类似于春季北极平流层的状态，在该状态下臭氧被严重破坏，直到最终变暖。