Acta Optica Sinica, Volume. 40, Issue 9, 0928003(2020)

Data Splicing Method for LiDAR Detection Temperature Under Fog-Haze Condition

Bo Li1,2, Hongxia Wei1, Liang Zhao3, Yufeng Wang1, and Dengxin Hua1、*
Author Affiliations
  • 1School of Mechanical and Precision Instrument Engineering, Xi′an University of Technology, Xi′an, Shaanxi 710048, China
  • 2State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
  • 3State Key Laboratory of Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
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    Figures & Tables(13)
    Flow chart of data splicing
    Visibility and AQI before and after the typical fog-haze case in Xi'an
    Qualitative analysis of the temperature profile during model data, lidar data and radiosonde data. (a) <2 km; (b) 2~20 km
    Quantitative analysis of the splicing data and radiosonde data on relative error. (a) Between lidar data and radiosonde data; (b) between model data and radiosonde data
    Relative error corresponding to 11 groups of step sizes
    Judgment criteria for based on 20 groups of splicing-regions in 4 groups of samples. (a) Correlation coefficient; (b) splicing-region deviation per km
    Parameters for selecting the best splicing-region. (a) Correlation coefficient; (b) splicing-region deviation per km; (c) fit-region deviation per km
    Temperature splicing results between model and lidar data. (a) Qualitative contrast on profiles between splicing temperature and standard temperature during the whole layers; (b) quantitative contrast on relative error between splicing temperature and standard temperature during the whole layers; (c) qualitative contrast on profiles between splicing temperature and standard temperature in the best splicing region
    Temperature splicing results between radiosonde and lidar data, and their comparison with the splicing results between model and lidar data. (a) Profile of splicing temperature between radiosonde and lidar data during the whole layers; (b) qualitative contrast on profiles between radiosonde-lidar splicing temperature and standard temperature in the best splicing region; (c) quantitative contrast on relative errors between the model-lidar splicing temperature and standard temperature, and between
    Splicing-region deviation per km corresponding to 8 groups of splicing-regions to be selected
    Contrast of splicing temperature at 20:00 UTC during the whole fog-haze phase. (a) Unsplicing temperature profile. (b) splicing temperature profile
    • Table 1. Parameters for WRF model simulation

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      Table 1. Parameters for WRF model simulation

      ParameterD01D02
      Input dataNCEP
      Central grid109°E, 34.25°NNested region
      Longitude84--134°E106--112°E
      Latitude24.25--44.25°N31.25--37.25°N
      Horizontal resolution9 km3 km
      Vertical resolution59 levels
      Time resolution30 min
      Microphysics parameterizationGoddard GCE
      Cumulus convection parameterizationKain-FritschNone
      Integration time (UTC)2013-12-15T00:00:00 to 2013-12-31T12:00:00
    • Table 2. Comprehensive evaluation parameters between model-lidar splicing and radiosonde-lidar splicing

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      Table 2. Comprehensive evaluation parameters between model-lidar splicing and radiosonde-lidar splicing

      Evaluation parameterModel-lidarRadiosonde-lidar
      The best splicing region /km0.89--1.410.78--1.22
      The best splicing value /km0.520.44
      Effective height /level≥41
      Correlation coefficient0.920.88
      Fit-region deviation per km /m-10.726.09
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    Bo Li, Hongxia Wei, Liang Zhao, Yufeng Wang, Dengxin Hua. Data Splicing Method for LiDAR Detection Temperature Under Fog-Haze Condition[J]. Acta Optica Sinica, 2020, 40(9): 0928003

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: Oct. 29, 2019

    Accepted: Jan. 17, 2020

    Published Online: May. 6, 2020

    The Author Email: Dengxin Hua (dengxinhua@xaut.edu.cn)

    DOI:10.3788/AOS202040.0928003

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