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Title: Height Dependency of Aerosol-Cloud Interaction Regimes: Height Dependency of ACI Regime

Abstract

This study investigates the height dependency of aerosol-cloud interaction regimes in terms of the joint dependence of the key cloud microphysical properties (e.g. cloud droplet number concentration, cloud droplet relative dispersion, etc.) on aerosol number concentration (Na) and vertical velocity (w). The three distinct regimes with different microphysical features are the aerosol-limited regime, the updraft-limited regime, and the transitional regime. The results reveal two new phenomena in updraft-limited regime: 1) The “condensational broadening” of cloud droplet size distribution in contrast to the well-known “condensational narrowing” in the aerosol-limited regime; 2) Above the level of maximum supersaturation, some cloud droplets are deactivated into interstitial aerosols in the updraft-limited regime whereas all droplets remain activated in the aerosol-limited regime. Further analysis shows that the particle equilibrium supersaturation plays important role in understanding these unique features. Also examined is the height of warm rain initiation and its dependence on Na and w. The rain initiation height is found to depend primarily on either Na or w or both in different Na-w regimes, thus suggesting a strong regime dependence of the second aerosol indirect effect.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [4]
  1. Stony Brook Univ., NY (United States). School of Marine and Atmospheric Sciences
  2. Stony Brook Univ., NY (United States). School of Marine and Atmospheric Sciences; Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Stony Brook Univ., NY (United States). School of Marine and Atmospheric Sciences; Chinese Academy of Sciences (CAS), Beijing (China). International Center for Climate and Environment Sciences (ICCES), Inst. of Atmospheric Physics
  4. Tsinghua Univ., Beijing (China). Ministry of Education Key Lab. for Earth System Modeling and Dept. of Earth System Science
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); National Basic Research Program of China; Ministry of Science and Technology of the People's Republic of China; National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1424974
Report Number(s):
BNL-200006-2018-JAAM
Journal ID: ISSN 2169-897X
Grant/Contract Number:  
SC0012704; 2016YFB02008; 2017YFC1501404; 41605106
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research: Atmospheres
Additional Journal Information:
Journal Volume: 123; Journal Issue: 1; Journal ID: ISSN 2169-897X
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. Height Dependency of Aerosol-Cloud Interaction Regimes: Height Dependency of ACI Regime. United States: N. p., 2018. Web. doi:10.1002/2017JD027431.
Chen, Jingyi, Liu, Yangang, Zhang, Minghua, & Peng, Yiran. Height Dependency of Aerosol-Cloud Interaction Regimes: Height Dependency of ACI Regime. United States. doi:10.1002/2017JD027431.
Chen, Jingyi, Liu, Yangang, Zhang, Minghua, and Peng, Yiran. Wed . "Height Dependency of Aerosol-Cloud Interaction Regimes: Height Dependency of ACI Regime". United States. doi:10.1002/2017JD027431. https://www.osti.gov/servlets/purl/1424974.
@article{osti_1424974,
title = {Height Dependency of Aerosol-Cloud Interaction Regimes: Height Dependency of ACI Regime},
author = {Chen, Jingyi and Liu, Yangang and Zhang, Minghua and Peng, Yiran},
abstractNote = {This study investigates the height dependency of aerosol-cloud interaction regimes in terms of the joint dependence of the key cloud microphysical properties (e.g. cloud droplet number concentration, cloud droplet relative dispersion, etc.) on aerosol number concentration (Na) and vertical velocity (w). The three distinct regimes with different microphysical features are the aerosol-limited regime, the updraft-limited regime, and the transitional regime. The results reveal two new phenomena in updraft-limited regime: 1) The “condensational broadening” of cloud droplet size distribution in contrast to the well-known “condensational narrowing” in the aerosol-limited regime; 2) Above the level of maximum supersaturation, some cloud droplets are deactivated into interstitial aerosols in the updraft-limited regime whereas all droplets remain activated in the aerosol-limited regime. Further analysis shows that the particle equilibrium supersaturation plays important role in understanding these unique features. Also examined is the height of warm rain initiation and its dependence on Na and w. The rain initiation height is found to depend primarily on either Na or w or both in different Na-w regimes, thus suggesting a strong regime dependence of the second aerosol indirect effect.},
doi = {10.1002/2017JD027431},
journal = {Journal of Geophysical Research: Atmospheres},
number = 1,
volume = 123,
place = {United States},
year = {2018},
month = {1}
}

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