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

LIU Jing-le; SHI Jing; LI Pei-yan; JIANG Ming; CAI Zi-ying; HAN Su-qin; CUI Ye; YAO Qing

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China Environmental Science ›› 2023, Vol. 43 ›› Issue (10) : 5070-5077.

Air Pollution Control

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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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.

Key words

aerosol Lidar / atmospheric boundary layer height / sea-shore-land / Tianjin / unmanned aerial vehicle

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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

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