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Area of Science:

  • Atmospheric Science
  • Aerosol Science
  • Remote Sensing

Background:

  • Aerosol liquid water content (ALWC) is vital for atmospheric radiation and chemistry.
  • Limited data exists on ALWC vertical distribution due to measurement challenges.

Purpose of the Study:

  • To develop a novel method for retrieving ALWC vertical profiles using polarization lidar.
  • To improve understanding of ALWC distribution, especially during haze events.

Main Methods:

  • Utilized polarization lidar measurements combined with surface in situ chemical composition data.
  • Established a correlation between particle linear depolarization ratio (δp) and liquid water mass fraction.
  • Developed a retrieval method based on the relationship between δp and the ALWC to particle backscatter coefficient ratio.

Main Results:

  • The proposed method retrieves ALWC with a relative error of approximately 30%.
  • Case studies indicated significant variations in ALWC between the upper boundary layer and ground level.
  • Demonstrated the potential of polarization lidar for profiling ALWC.

Conclusions:

  • Polarization lidar offers a promising approach for measuring ALWC vertical distributions.
  • Accurate ALWC profiling is essential for advancing studies on haze formation and atmospheric processes.