New understanding and quantification of the regime dependence of aerosol-cloud interaction for studying aerosol indirect effects
Abstract
In this study, aerosol indirect effects suffer from large uncertainty in climate models and among observations. This study focuses on two plausible factors: regime dependence of aerosol-cloud interactions and the effect of cloud droplet spectral shape. We show, using a new parcel model, that combined consideration of droplet number concentration (Nc) and relative dispersion (ε, ratio of standard deviation to mean radius of the cloud droplet size distribution) better characterizes the regime dependence of aerosol-cloud interactions than considering Nc alone. Given updraft velocity (w), ε increases with increasing aerosol number concentration (Na) in the aerosol-limited regime, peaks in the transitional regime, and decreases with further increasing Na in the updraft-limited regime. This new finding further reconciles contrasting observations in literature and reinforces the compensating role of dispersion effect. The nonmonotonic behavior of ε further quantifies the relationship between the transitional Na and w that separates the aerosol- and updraft-limited regimes.
- Authors:
-
- Stony Brook Univ., Stony Brook, NY (United States)
- Stony Brook Univ., Stony Brook, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Tsinghua Univ., Beijing (China)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1245387
- Report Number(s):
- BNL-111944-2016-JA
Journal ID: ISSN 0094-8276; R&D Project: 2016-BNL-EE631EECA-Budg; KP1703020
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 43; Journal Issue: 4; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Chen, Jingyi, Liu, Yangang, Zhang, Minghua, and Peng, Yiran. New understanding and quantification of the regime dependence of aerosol-cloud interaction for studying aerosol indirect effects. United States: N. p., 2016.
Web. doi:10.1002/2016GL067683.
Chen, Jingyi, Liu, Yangang, Zhang, Minghua, & Peng, Yiran. New understanding and quantification of the regime dependence of aerosol-cloud interaction for studying aerosol indirect effects. United States. https://doi.org/10.1002/2016GL067683
Chen, Jingyi, Liu, Yangang, Zhang, Minghua, and Peng, Yiran. Sun .
"New understanding and quantification of the regime dependence of aerosol-cloud interaction for studying aerosol indirect effects". United States. https://doi.org/10.1002/2016GL067683. https://www.osti.gov/servlets/purl/1245387.
@article{osti_1245387,
title = {New understanding and quantification of the regime dependence of aerosol-cloud interaction for studying aerosol indirect effects},
author = {Chen, Jingyi and Liu, Yangang and Zhang, Minghua and Peng, Yiran},
abstractNote = {In this study, aerosol indirect effects suffer from large uncertainty in climate models and among observations. This study focuses on two plausible factors: regime dependence of aerosol-cloud interactions and the effect of cloud droplet spectral shape. We show, using a new parcel model, that combined consideration of droplet number concentration (Nc) and relative dispersion (ε, ratio of standard deviation to mean radius of the cloud droplet size distribution) better characterizes the regime dependence of aerosol-cloud interactions than considering Nc alone. Given updraft velocity (w), ε increases with increasing aerosol number concentration (Na) in the aerosol-limited regime, peaks in the transitional regime, and decreases with further increasing Na in the updraft-limited regime. This new finding further reconciles contrasting observations in literature and reinforces the compensating role of dispersion effect. The nonmonotonic behavior of ε further quantifies the relationship between the transitional Na and w that separates the aerosol- and updraft-limited regimes.},
doi = {10.1002/2016GL067683},
journal = {Geophysical Research Letters},
number = 4,
volume = 43,
place = {United States},
year = {Sun Feb 28 00:00:00 EST 2016},
month = {Sun Feb 28 00:00:00 EST 2016}
}
Web of Science
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