A study of aerosol activation at the cloud edge with high resolution numerical simulations

Natalia Babkovskaia, Michael Boy, Sampo Smolander, Sami Romakkaniemi, Üllar Rannik, Markku Kulmala

Research output: Contribution to journalArticleScientificpeer-review

Abstract

High resolution numerical simulations are used to study the structure of the cloud edge area. We consider an aerosol distribution function with a similar aerosol core size (12 nm). The aerosol composition is assumed to be water soluble NaCl. Depending on the specific conditions in the investigated cloud edge area, water is evaporated or activated from the aerosol surface. We use a publicly available high order domain code for direct numerical simulation (DNS) in combination with the Smagorinsky subgrid scale model. We compare 2D and 3D model results of turbulent air motion of aerosol particles with varying grid cell sizes. We show that a 2D model with high resolution gives a more realistic number of activated particles than the corresponding 3D model with lower resolution. We also study the effects of aerosol dynamics on turbulent fields and show that water vapor condensation and evaporation have significant effects on temperature and supersaturation fields.
Original languageEnglish
JournalAtmospheric Research
Volume153
Pages (from-to)49–58
Number of pages10
ISSN0169-8095
DOIs
Publication statusPublished - Feb 2015
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences
  • AEROSOL ACTIVATION
  • CLOUD MICROPHYSICS
  • AEROSOL DYNAMICS

Cite this

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title = "A study of aerosol activation at the cloud edge with high resolution numerical simulations",
abstract = "High resolution numerical simulations are used to study the structure of the cloud edge area. We consider an aerosol distribution function with a similar aerosol core size (12 nm). The aerosol composition is assumed to be water soluble NaCl. Depending on the specific conditions in the investigated cloud edge area, water is evaporated or activated from the aerosol surface. We use a publicly available high order domain code for direct numerical simulation (DNS) in combination with the Smagorinsky subgrid scale model. We compare 2D and 3D model results of turbulent air motion of aerosol particles with varying grid cell sizes. We show that a 2D model with high resolution gives a more realistic number of activated particles than the corresponding 3D model with lower resolution. We also study the effects of aerosol dynamics on turbulent fields and show that water vapor condensation and evaporation have significant effects on temperature and supersaturation fields.",
keywords = "114 Physical sciences, AEROSOL ACTIVATION, CLOUD MICROPHYSICS, AEROSOL DYNAMICS",
author = "Natalia Babkovskaia and Michael Boy and Sampo Smolander and Sami Romakkaniemi and {\"U}llar Rannik and Markku Kulmala",
year = "2015",
month = "2",
doi = "10.1016/j.atmosres.2014.07.017",
language = "English",
volume = "153",
pages = "49–58",
journal = "Atmospheric Research",
issn = "0169-8095",
publisher = "EXCERPTA MEDICA INC-ELSEVIER SCIENCE INC",

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A study of aerosol activation at the cloud edge with high resolution numerical simulations. / Babkovskaia, Natalia; Boy, Michael; Smolander, Sampo; Romakkaniemi, Sami; Rannik, Üllar; Kulmala, Markku.

In: Atmospheric Research, Vol. 153, 02.2015, p. 49–58.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - A study of aerosol activation at the cloud edge with high resolution numerical simulations

AU - Babkovskaia, Natalia

AU - Boy, Michael

AU - Smolander, Sampo

AU - Romakkaniemi, Sami

AU - Rannik, Üllar

AU - Kulmala, Markku

PY - 2015/2

Y1 - 2015/2

N2 - High resolution numerical simulations are used to study the structure of the cloud edge area. We consider an aerosol distribution function with a similar aerosol core size (12 nm). The aerosol composition is assumed to be water soluble NaCl. Depending on the specific conditions in the investigated cloud edge area, water is evaporated or activated from the aerosol surface. We use a publicly available high order domain code for direct numerical simulation (DNS) in combination with the Smagorinsky subgrid scale model. We compare 2D and 3D model results of turbulent air motion of aerosol particles with varying grid cell sizes. We show that a 2D model with high resolution gives a more realistic number of activated particles than the corresponding 3D model with lower resolution. We also study the effects of aerosol dynamics on turbulent fields and show that water vapor condensation and evaporation have significant effects on temperature and supersaturation fields.

AB - High resolution numerical simulations are used to study the structure of the cloud edge area. We consider an aerosol distribution function with a similar aerosol core size (12 nm). The aerosol composition is assumed to be water soluble NaCl. Depending on the specific conditions in the investigated cloud edge area, water is evaporated or activated from the aerosol surface. We use a publicly available high order domain code for direct numerical simulation (DNS) in combination with the Smagorinsky subgrid scale model. We compare 2D and 3D model results of turbulent air motion of aerosol particles with varying grid cell sizes. We show that a 2D model with high resolution gives a more realistic number of activated particles than the corresponding 3D model with lower resolution. We also study the effects of aerosol dynamics on turbulent fields and show that water vapor condensation and evaporation have significant effects on temperature and supersaturation fields.

KW - 114 Physical sciences

KW - AEROSOL ACTIVATION

KW - CLOUD MICROPHYSICS

KW - AEROSOL DYNAMICS

U2 - 10.1016/j.atmosres.2014.07.017

DO - 10.1016/j.atmosres.2014.07.017

M3 - Article

VL - 153

SP - 49

EP - 58

JO - Atmospheric Research

JF - Atmospheric Research

SN - 0169-8095

ER -