Observation and analysis of urban boundary layer characteristics with Raman-Mie lidar

Qing Yan; Dengxin Hua; Yufeng Wang; Shichun Li; Takao Kobayashi

doi:10.1117/12.977411

19 November 2012 Observation and analysis of urban boundary layer characteristics with Raman-Mie lidar

Qing Yan, Dengxin Hua, Yufeng Wang, Shichun Li, Takao Kobayashi

Proceedings Volume 8526, Lidar Remote Sensing for Environmental Monitoring XIII; 85260S (2012) https://doi.org/10.1117/12.977411
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

Abstract

Long-term observations of atmosphere aerosol optical properties over Xi’an area have been carried out by a Raman-Mie lidar and a Micro-pulsed 3D Scanning Mie lidar, which were built at Xi’an University of technology with the laser wavelength of 355nm and 532nm, respectively. The Raman-Mie lidar is used for observation of the atmospheric temperature, water vapor and aerosol profiles simultaneously. In order to deeply discuss the temporal-spatial evolution of the mixed-layer within the urban boundary layer (UBL), the method of combining the absolute minimum of first derivative and second derivative of the range-squared-corrected signal (RSCS) of lidar was used to retrieve the mixed-layer depth (MLD). By using continuous observations of 24-hour (THI display), the MLD in temporal and spatial variation are clearly revealed. Also, the results of continuous observations from July 2006 to October 2011 have been analyzed for revealing the seasonal cycle and the annual cycle of the MLD. By analyzing the average MLD, it is obviously shown that the MLD of seasonal cycle is higher in summer than in winter over Xi’an area. Otherwise, by investigating the relationship of atmospheric boundary layer height, relative humidity and temperature, and the dependence characteristics and a general disciplinarian between them are then obtained. The achievement is of great importance for studying the proliferation of urban pollution and obtaining a complete meteorological status of the urban atmosphere.

Citation Download Citation

Qing Yan, Dengxin Hua, Yufeng Wang, Shichun Li, and Takao Kobayashi "Observation and analysis of urban boundary layer characteristics with Raman-Mie lidar", Proc. SPIE 8526, Lidar Remote Sensing for Environmental Monitoring XIII, 85260S (19 November 2012); https://doi.org/10.1117/12.977411

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