The Role of Ice Splintering on Microphysics of Deep Convective Clouds Forming Under Different Aerosol Conditions: Simulations Using the Model With Spectral Bin Microphysics
Abstract
Observations during the Ice in Clouds Experiment-Tropical (ICE-T) field experiment show that the ice particles concentration in a developing deep convective clouds at the level of T = -15 °C reached about 500 L-1, that is, many orders higher than that of ice-nucleating particle. To simulate microphysics of these clouds, the 2-D Hebrew University Cloud model (HUCM) with spectral bin microphysics was used in which two main types of ice multiplication mechanisms were included in addition to the Hallet-Mossop mechanism. In the first ice multiplication mechanism ice splinters form by drop freezing and drop-ice collisions. Ice multiplication of this type dominates during developing stage of cloud evolution, when liquid water content is significant. At later stage when clouds become nearly glaciated, ice crystals are produced largely by ice splintering during ice-ice collisions (the second ice multiplication mechanism). Simulations show that droplet size distributions, as well as size distributions of ice particles, agree well with the measurements during ICE-T. Simulations with different cloud condensation nuclei concentrations show the existence of the “optimum” cloud condensation nuclei concentration (or droplet concentration), at which concentration of ice splinters reaches maximum. In these simulations ice nucleation caused by the direct formation of ice crystals uponmore »
- Authors:
-
- Nanjing Univ. (China); Hebrew Univ. of Jerusalem (Israel)
- Hebrew Univ. of Jerusalem (Israel)
- Lund Univ. (Sweden)
- Weizmann Inst. of Science, Rehovot (Israel)
- Nanjing Univ. (China)
- Publication Date:
- Research Org.:
- Univ. of Oklahoma, Norman, OK (United States); Lund Univ. (Sweden)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1802604
- Grant/Contract Number:
- SC0014295; SC0018932
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research: Atmospheres
- Additional Journal Information:
- Journal Volume: 125; Journal Issue: 3; Journal ID: ISSN 2169-897X
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; Meteorology & Atmospheric Sciences
Citation Formats
Qu, Yi, Khain, Alexander, Phillips, Vaughan, Ilotoviz, Eyal, Shpund, Jacob, Patade, Sachin, and Chen, Baojun. The Role of Ice Splintering on Microphysics of Deep Convective Clouds Forming Under Different Aerosol Conditions: Simulations Using the Model With Spectral Bin Microphysics. United States: N. p., 2020.
Web. doi:10.1029/2019jd031312.
Qu, Yi, Khain, Alexander, Phillips, Vaughan, Ilotoviz, Eyal, Shpund, Jacob, Patade, Sachin, & Chen, Baojun. The Role of Ice Splintering on Microphysics of Deep Convective Clouds Forming Under Different Aerosol Conditions: Simulations Using the Model With Spectral Bin Microphysics. United States. https://doi.org/10.1029/2019jd031312
Qu, Yi, Khain, Alexander, Phillips, Vaughan, Ilotoviz, Eyal, Shpund, Jacob, Patade, Sachin, and Chen, Baojun. Mon .
"The Role of Ice Splintering on Microphysics of Deep Convective Clouds Forming Under Different Aerosol Conditions: Simulations Using the Model With Spectral Bin Microphysics". United States. https://doi.org/10.1029/2019jd031312. https://www.osti.gov/servlets/purl/1802604.
@article{osti_1802604,
title = {The Role of Ice Splintering on Microphysics of Deep Convective Clouds Forming Under Different Aerosol Conditions: Simulations Using the Model With Spectral Bin Microphysics},
author = {Qu, Yi and Khain, Alexander and Phillips, Vaughan and Ilotoviz, Eyal and Shpund, Jacob and Patade, Sachin and Chen, Baojun},
abstractNote = {Observations during the Ice in Clouds Experiment-Tropical (ICE-T) field experiment show that the ice particles concentration in a developing deep convective clouds at the level of T = -15 °C reached about 500 L-1, that is, many orders higher than that of ice-nucleating particle. To simulate microphysics of these clouds, the 2-D Hebrew University Cloud model (HUCM) with spectral bin microphysics was used in which two main types of ice multiplication mechanisms were included in addition to the Hallet-Mossop mechanism. In the first ice multiplication mechanism ice splinters form by drop freezing and drop-ice collisions. Ice multiplication of this type dominates during developing stage of cloud evolution, when liquid water content is significant. At later stage when clouds become nearly glaciated, ice crystals are produced largely by ice splintering during ice-ice collisions (the second ice multiplication mechanism). Simulations show that droplet size distributions, as well as size distributions of ice particles, agree well with the measurements during ICE-T. Simulations with different cloud condensation nuclei concentrations show the existence of the “optimum” cloud condensation nuclei concentration (or droplet concentration), at which concentration of ice splinters reaches maximum. In these simulations ice nucleation caused by the direct formation of ice crystals upon ice-nucleating particles, as well as the Hallett-Mossop process, has a negligible contribution to the ice crystal concentration.},
doi = {10.1029/2019jd031312},
journal = {Journal of Geophysical Research: Atmospheres},
number = 3,
volume = 125,
place = {United States},
year = {Mon Feb 03 00:00:00 EST 2020},
month = {Mon Feb 03 00:00:00 EST 2020}
}
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