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Aerosol effect on cloud droplet size as monitored from surface-based remote sensing over East China Sea region

Pandithurai, G and Takamura, T and Yamaguchi, J and Miyagi, K and Takano, T and Ishizaka, Y and Dipu, S and Shimizu, A (2009) Aerosol effect on cloud droplet size as monitored from surface-based remote sensing over East China Sea region. Geophysical Research Letters, 36 (13).

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Abstract

The effect of increased aerosol concentrations on the low-level, non-precipitating, ice-free stratus clouds is examined using a suite of surface-based remote sensing systems. Cloud droplet effective radius and liquid water path are retrieved using cloud radar and microwave radiometer. Collocated measurements of aerosol scattering coefficient, size distribution and cloud condensation nuclei (CCN) concentrations were used to examine the response of cloud droplet size and optical thickness to increased CCN proxies. During the episodic events of increase in aerosol accumulation-mode volume distribution, the decrease in droplet size and increase in cloud optical thickness is observed. The indirect effect estimates are made for both droplet effective radius and cloud optical thickness for different liquid water path ranges and they range 0.02-0.18 and 0.005-0.154, respectively. Data are also categorized into thin and thick clouds based on cloud geometric thickness (Îz) and estimates show IE values are relatively higher for thicker clouds.

Item Type: Article
Additional Information: Copyright of this article belongs to American Geophysical Union.
Uncontrolled Keywords: Accumulation modes; Aerosol concentration; Aerosol effect; Aerosol scattering coefficient; Cloud condensation nuclei; Cloud droplets; Cloud optical thickness; Cloud radar; Droplet sizes; East China Sea; Effective radius; Episodic events; Indirect effects; Liquid water paths; Microwave radiometers; Optical thickness; Remote sensing system; Surface-based, Atmospheric aerosols; Clouds; Liquids; Microwave devices; Radiometry; Remote sensing, Drop formation, aerosol; cloud condensation nucleus; cloud droplet; concentration (composition); measurement method; remote sensing, East China Sea; Pacific Ocean
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 22 Feb 2015 05:30
Last Modified: 22 Feb 2015 05:30
URI: http://moeseprints.incois.gov.in/id/eprint/1758

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