基于激光雷达的天津海-岸-陆地区大气边界层高度研究

刘敬乐; 史静; 李培彦; 姜明; 蔡子颖; 韩素芹; 崔晔; 姚青

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中国环境科学 ›› 2023, Vol. 43 ›› Issue (10) : 5070-5077.

大气污染与控制

基于激光雷达的天津海-岸-陆地区大气边界层高度研究

刘敬乐¹, 史静¹, 李培彦^2,3, 姜明¹, 蔡子颖⁴, 韩素芹⁴, 崔晔¹, 姚青⁴

作者信息 +

Study of atmospheric boundary layer height over Tianjin sea-shore-land area based on Lidar

LIU Jing-le¹, SHI Jing¹, LI Pei-yan^2,3, JIANG Ming¹, CAI Zi-ying⁴, HAN Su-qin⁴, CUI Ye¹, YAO Qing⁴

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摘要

利用2018年8月~2019年7月的气溶胶激光雷达观测数据对天津城市、渤海沿岸和渤海地区的大气边界层高度进行了反演，并利用无人机探空观测对激光雷达反演结果进行验证，同时结合天津大气边界层观测站、塘沽站和渤海A平台站的不同气象特征分析了大气边界层高度的分布特征及其差异产生的原因.结果表明：激光雷达和无人机观测获得的大气边界层高度具有较高一致性，在稳定、中性和不稳定层结条件下两者的相关系数分别为0.508，0.565和0.687.天津城区和塘沽地区各季节的大气边界层高度日变化规律较为一致，与各季节湍流动能和感热通量日变化规律接近，均呈单峰型分布，A平台大气边界层高度具有明显的海洋大气特征，表现为冬季高于城区和塘沽，夏季则与之相反.夏季由于海陆环流造成的热力内边界层的形成，是市区与塘沽大气边界层高度差异产生的原因之一，2019年夏季塘沽出现热力内边界层的情况下，其午后边界层高度下降约30~160m，与城区的大气边界层高度差升高约150~300m.

Abstract

The atmospheric boundary layer heights over urban area of Tianjin, the Bohai coast and the Bohai area were retrieved using the aerosol Lidar observation data from August 2018 to July 2019. And the result of aerosol Lidar inversion were verified by sounding observation of unmanned aerial vehicle. Combined with the different meteorological characteristics of Tianjin atmospheric boundary layer observation station, Tanggu sation and Bohai A-platform station, the distribution characteristics of the atmospheric boundary layer heights and the reasons for the differences were analyzed. The results showed that the atmospheric boundary layer heights obtained by Lidar and unmanned aerial vehicle had high uniformity, and the correlation coefficients between them were 0.508, 0.565 and 0.687, respectively, under stable, neutral and unstable stratification conditions. The diurnal variation of the atmospheric boundary layer heights in Tianjin urban area and Tanggu area showed unimodal distribution, which was close to the diurnal variation of turbulent kinetic energy and sensible heat flux in each season. The atmospheric boundary layer heights of A-platform had obvious characteristics of ocean atmosphere, which were higher than those of the urban area and Tanggu area in winter, but the opposite performance in summer. The formation of the intra-thermal boundary layer caused by the sea-land circulation in summer was one of the reasons for the difference in the heights of the atmospheric boundary layer between the urban area and Tanggu. When the intra-thermal boundary layer appeared in Tanggu in summer of 2019, the height of the afternoon boundary layer decreased by 30 to 160m approximately, while the difference between the boundary layer heights of Tanggu and the urban area increased by 150 to 300m approximately.

导出引用

刘敬乐, 史静, 李培彦, 姜明, 蔡子颖, 韩素芹, 崔晔, 姚青. 基于激光雷达的天津海-岸-陆地区大气边界层高度研究[J]. 中国环境科学. 2023, 43(10): 5070-5077

LIU Jing-le, SHI Jing, LI Pei-yan, JIANG Ming, CAI Zi-ying, HAN Su-qin, CUI Ye, YAO Qing. Study of atmospheric boundary layer height over Tianjin sea-shore-land area based on Lidar[J]. China Environmental Science. 2023, 43(10): 5070-5077

中图分类号： X51

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