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The relationship between cloud distribution characteristics and meteorological elements over China.

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|August 27, 2025
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Meteorological elements significantly impact cloud characteristics. This study reveals distinct tropical and temperate cloud behaviors, with water vapor content exponentially correlating with temperature, especially in cirrus clouds.

Keywords:
CALIOPCloud phasesCloud typesMeteorological elements

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Area of Science:

  • Atmospheric Science
  • Cloud Physics
  • Meteorology

Background:

  • Meteorological elements influence cloud macro and micro characteristics.
  • Understanding these relationships is crucial for climate modeling and weather prediction.

Purpose of the Study:

  • Analyze the relationship between cloud types/phases and meteorological elements over China.
  • Investigate the influence of temperature, relative humidity, and specific humidity on cloud formation and properties.

Main Methods:

  • Utilized CALIOP Level 2 VFM products and ERA5 reanalysis data.
  • Employed statistical methods, including two-dimensional probability density function analysis and linear fitting.
  • Defined and analyzed water vapor content saturability using Tetens formula.

Main Results:

  • Identified distinct tropical and temperate cloud regions based on relative humidity and temperature.
  • Observed similar linear trends for transparent altocumulus and altostratus, indicating consistent temperature-humidity relationships in mixed-phase cloud environments.
  • Found an exponential correlation between water vapor content and temperature in high-probability cloud occurrence areas.
  • Determined that water vapor content saturability increases with decreasing temperature, particularly in cirrus clouds.

Conclusions:

  • Cloud type and phase are strongly linked to background meteorological conditions.
  • Temperature and humidity play critical roles in cloud formation, with distinct patterns for different cloud types.
  • Water vapor content and its saturation levels are sensitive to temperature, offering insights into cloud microphysics.