Aerosol effects on the development of a supercell storm in a double-moment bulk-cloud microphysics scheme

Kyo Sun Sunny Lim, Song You Hong, Seong Soo Yum, Jimy Dudhia, Joseph B. Klemp

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This study investigates the aerosol effects on the development of an idealized three-dimensional supercell storm, focusing on storm morphology and precipitation during a quasi steady state of a storm. The impact of the aerosol concentration on the simulated storm is evaluated by varying the initial cloud condensation nuclei (CCN) number concentration in the Weather Research and Forecasting Double-Moment Six-Class microphysics scheme. A right-moving, quasi-steady supercell with two diverging echo masses was reproduced, compared with the previous modeling study. In the experiment with a high CCN number concentration, storm intensity was weakened, and surface precipitation was reduced. On the other hand, the simulation that excluded the graupel substance produced a weaker low-level downdraft, thus less near-surface vorticity, compared with the simulation that included graupel. The CCN number concentrations did not affect the storm structures in the absence of graupel. In addition, the aerosol effects on the surface precipitation with respect to the initial CCN value were diametrically opposed. The major reason for the different responses to aerosol can be attributed to the exaggerated snow mass loading across the convective core when the graupel species is excluded. The results indicate that graupel species and related microphysics are crucial to the realistic representation of the aerosol-precipitation interactions within a supercell storm.

Original languageEnglish
Article numberD02204
JournalJournal of Geophysical Research Atmospheres
Volume116
Issue number2
DOIs
Publication statusPublished - 2011 Jan 1

Fingerprint

cloud microphysics
supercell
graupel
aerosols
Aerosols
condensation nuclei
aerosol
cloud condensation nucleus
moments
Condensation
Precipitation (meteorology)
quasi-steady states
snow
Snow
effect
Vorticity
weather
vorticity
forecasting
simulation

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

@article{fd6ffcd1ed284f2b9b7a9c0151bf00c4,
title = "Aerosol effects on the development of a supercell storm in a double-moment bulk-cloud microphysics scheme",
abstract = "This study investigates the aerosol effects on the development of an idealized three-dimensional supercell storm, focusing on storm morphology and precipitation during a quasi steady state of a storm. The impact of the aerosol concentration on the simulated storm is evaluated by varying the initial cloud condensation nuclei (CCN) number concentration in the Weather Research and Forecasting Double-Moment Six-Class microphysics scheme. A right-moving, quasi-steady supercell with two diverging echo masses was reproduced, compared with the previous modeling study. In the experiment with a high CCN number concentration, storm intensity was weakened, and surface precipitation was reduced. On the other hand, the simulation that excluded the graupel substance produced a weaker low-level downdraft, thus less near-surface vorticity, compared with the simulation that included graupel. The CCN number concentrations did not affect the storm structures in the absence of graupel. In addition, the aerosol effects on the surface precipitation with respect to the initial CCN value were diametrically opposed. The major reason for the different responses to aerosol can be attributed to the exaggerated snow mass loading across the convective core when the graupel species is excluded. The results indicate that graupel species and related microphysics are crucial to the realistic representation of the aerosol-precipitation interactions within a supercell storm.",
author = "Lim, {Kyo Sun Sunny} and Hong, {Song You} and Yum, {Seong Soo} and Jimy Dudhia and Klemp, {Joseph B.}",
year = "2011",
month = "1",
day = "1",
doi = "10.1029/2010JD014128",
language = "English",
volume = "116",
journal = "Journal of Geophysical Research: Earth Surface",
issn = "2169-897X",
number = "2",

}

Aerosol effects on the development of a supercell storm in a double-moment bulk-cloud microphysics scheme. / Lim, Kyo Sun Sunny; Hong, Song You; Yum, Seong Soo; Dudhia, Jimy; Klemp, Joseph B.

In: Journal of Geophysical Research Atmospheres, Vol. 116, No. 2, D02204, 01.01.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Aerosol effects on the development of a supercell storm in a double-moment bulk-cloud microphysics scheme

AU - Lim, Kyo Sun Sunny

AU - Hong, Song You

AU - Yum, Seong Soo

AU - Dudhia, Jimy

AU - Klemp, Joseph B.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - This study investigates the aerosol effects on the development of an idealized three-dimensional supercell storm, focusing on storm morphology and precipitation during a quasi steady state of a storm. The impact of the aerosol concentration on the simulated storm is evaluated by varying the initial cloud condensation nuclei (CCN) number concentration in the Weather Research and Forecasting Double-Moment Six-Class microphysics scheme. A right-moving, quasi-steady supercell with two diverging echo masses was reproduced, compared with the previous modeling study. In the experiment with a high CCN number concentration, storm intensity was weakened, and surface precipitation was reduced. On the other hand, the simulation that excluded the graupel substance produced a weaker low-level downdraft, thus less near-surface vorticity, compared with the simulation that included graupel. The CCN number concentrations did not affect the storm structures in the absence of graupel. In addition, the aerosol effects on the surface precipitation with respect to the initial CCN value were diametrically opposed. The major reason for the different responses to aerosol can be attributed to the exaggerated snow mass loading across the convective core when the graupel species is excluded. The results indicate that graupel species and related microphysics are crucial to the realistic representation of the aerosol-precipitation interactions within a supercell storm.

AB - This study investigates the aerosol effects on the development of an idealized three-dimensional supercell storm, focusing on storm morphology and precipitation during a quasi steady state of a storm. The impact of the aerosol concentration on the simulated storm is evaluated by varying the initial cloud condensation nuclei (CCN) number concentration in the Weather Research and Forecasting Double-Moment Six-Class microphysics scheme. A right-moving, quasi-steady supercell with two diverging echo masses was reproduced, compared with the previous modeling study. In the experiment with a high CCN number concentration, storm intensity was weakened, and surface precipitation was reduced. On the other hand, the simulation that excluded the graupel substance produced a weaker low-level downdraft, thus less near-surface vorticity, compared with the simulation that included graupel. The CCN number concentrations did not affect the storm structures in the absence of graupel. In addition, the aerosol effects on the surface precipitation with respect to the initial CCN value were diametrically opposed. The major reason for the different responses to aerosol can be attributed to the exaggerated snow mass loading across the convective core when the graupel species is excluded. The results indicate that graupel species and related microphysics are crucial to the realistic representation of the aerosol-precipitation interactions within a supercell storm.

UR - http://www.scopus.com/inward/record.url?scp=79251641766&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79251641766&partnerID=8YFLogxK

U2 - 10.1029/2010JD014128

DO - 10.1029/2010JD014128

M3 - Article

AN - SCOPUS:79251641766

VL - 116

JO - Journal of Geophysical Research: Earth Surface

JF - Journal of Geophysical Research: Earth Surface

SN - 2169-897X

IS - 2

M1 - D02204

ER -