What question did this study set out to answer?

To investigate warm cloud microphysics, specifically droplet growth and drop collection efficiency, on a global scale using combined spaceborne radar and radiometer observations.

May 10, 2010Journal of the Atmospheric Sciences

Particle Growth and Drop Collection Efficiency of Warm Clouds as Inferred from Joint CloudSat and MODIS Observations

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Authors

KSKentaroh SuzukiSphere Institute TNTakashi Y. NakajimaTokai University GSGraeme L. StephensNSF National Center for Atmospheric Research

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Implication

Satellite observational analysis reveals size-dependent drop collection efficiency in warm clouds, highlighting microphysical transitions from cloud droplets to rain.

Key Points

To investigate warm cloud microphysics, specifically droplet growth and drop collection efficiency, on a global scale using combined spaceborne radar and radiometer observations.
Combined CloudSat radar reflectivity profiles with Moderate Resolution Imaging Spectroradiometer (MODIS) optical thickness and effective particle radius measurements.
Rescaled vertical radar reflectivity profiles against in-cloud optical depth derived under adiabatic and condensational growth assumptions.
Applied a continuous collection model to quantify drop collection efficiency factors from the vertical slope of reflectivity with respect to optical depth.
Rescaled reflectivity profiles systematically mapped the transition from cloud droplets to precipitation particles as optical depth and MODIS effective radius increased.
Effective radii retrieved from two separate MODIS wavelengths traced reflectivity changes differently due to differences in cloud penetration depth.
Reflectivity slope analysis demonstrated a strong positive dependency of drop collection efficiency on cloud droplet size.

Cite This Study

Suzuki et al. (2010) studied this question.

synapsesocial.com/papers/6a6f16673ce530166bc290d5 https://doi.org/10.1175/2010jas3463.1

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Implication

Satellite observational analysis reveals size-dependent drop collection efficiency in warm clouds, highlighting microphysical transitions from cloud droplets to rain.

Particle Growth and Drop Collection Efficiency of Warm Clouds as Inferred from Joint CloudSat and MODIS Observations

Discussion

Member takes

Implication

Key Points

Cite This Study

Particle Growth and Drop Collection Efficiency of Warm Clouds as Inferred from Joint CloudSat and MODIS Observations

Discussion

Member takes

Implication

Key Points

Cite This Study

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