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Modeling the Radiative Effect on Microphysics in Cirrus Clouds Against Satellite Observations.

Xiping Zeng1, Jie Gong2,3, Xiaowen Li2,4

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PubMed
Summary

The radiative effect on microphysics (REM) impacts cirrus clouds by influencing ice crystal formation. Satellite observations confirm REM

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Area of Science:

  • Atmospheric Science
  • Cloud Physics
  • Remote Sensing

Background:

  • The radiative effect on microphysics (REM) is crucial for near-surface dew/frost formation.
  • Understanding REM's influence on cirrus clouds is vital for climate modeling.
  • Cirrus clouds significantly impact Earth's radiative balance.

Purpose of the Study:

  • To investigate the impact of the radiative effect on microphysics (REM) on cirrus clouds.
  • To determine how radiative cooling and warming influence ice crystal formation in cirrus clouds.
  • To validate microphysical model simulations using satellite observations.

Main Methods:

  • Utilized bin microphysical model simulations.
  • Analyzed coincident data from CloudSat and Global Precipitation Measurement (GPM) satellites.
  • Employed GPM Microwave Imager (GMI) observations at 166 GHz to detect horizontally oriented ice crystals (HOICs).

Main Results:

  • Radiative cooling favors horizontally oriented ice crystals (HOICs), while radiative warming does not.
  • GMI observations of HOIC distributions in different cloud types align with model predictions.
  • Midlevel thick clouds showed higher HOIC concentrations than high-level clouds.

Conclusions:

  • The radiative effect on microphysics (REM) significantly impacts cirrus clouds.
  • Horizontally oriented ice crystals (HOICs) can serve as a proxy for detecting REM in cirrus clouds.
  • The agreement between model simulations and satellite data suggests REM is a common phenomenon in cirrus clouds.