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The influence of multiple groups of biological ice nucleating particles on microphysical properties of mixed-phase clouds observed during MC3E

Patade, Sachin LU ; Waman, Deepak LU orcid ; Deshmukh, Akash LU ; Gupta, Ashok Kumar LU ; Jadav, Arti LU orcid ; Phillips, Vaughan T.J. LU orcid ; Bansemer, Aaron ; Carlin, Jacob and Ryzhkov, Alexander (2022) In Atmospheric Chemistry and Physics 22(18). p.12055-12075
Abstract

A new empirical parameterization (EP) for multiple groups of primary biological aerosol particles (PBAPs) is implemented in the aerosol-cloud model (AC) to investigate their roles as ice nucleating particles (INPs). The EP describes the heterogeneous ice nucleation by (1) fungal spores, (2) bacteria, (3) pollen, (4) detritus of plants, animals, and viruses, and (5) algae. Each group includes fragments from the originally emitted particles. A high-resolution simulation of a midlatitude mesoscale squall line by AC is validated against airborne and ground observations. Sensitivity tests are carried out by varying the initial vertical profiles of the loadings of individual PBAP groups. The resulting changes in warm and ice cloud... (More)

A new empirical parameterization (EP) for multiple groups of primary biological aerosol particles (PBAPs) is implemented in the aerosol-cloud model (AC) to investigate their roles as ice nucleating particles (INPs). The EP describes the heterogeneous ice nucleation by (1) fungal spores, (2) bacteria, (3) pollen, (4) detritus of plants, animals, and viruses, and (5) algae. Each group includes fragments from the originally emitted particles. A high-resolution simulation of a midlatitude mesoscale squall line by AC is validated against airborne and ground observations. Sensitivity tests are carried out by varying the initial vertical profiles of the loadings of individual PBAP groups. The resulting changes in warm and ice cloud microphysical parameters are investigated. The changes in warm microphysical parameters, including liquid water content and cloud droplet number concentration, are minimal (<10 %). Overall, PBAPs have little effect on the ice number concentration (<6 %) in the convective region. In the stratiform region, increasing the initial PBAP loadings by a factor of 1000 resulted in less than 40 % change in ice number concentrations. The total ice concentration is mostly controlled by various mechanisms of secondary ice production (SIP). However, when SIP is intentionally shut down in sensitivity tests, increasing the PBAP loading by a factor of 100 has an effect of less than 3 % on the ice phase. Further sensitivity tests revealed that PBAPs have little effect on surface precipitation and on the shortwave and longwave flux (<4 %) for a 100-fold perturbation in PBAPs.

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Atmospheric Chemistry and Physics
volume
22
issue
18
pages
21 pages
publisher
Copernicus GmbH
external identifiers
  • scopus:85140335156
ISSN
1680-7316
DOI
10.5194/acp-22-12055-2022
project
Mechanisms for the Ice Nucleus Aerosols and their Indirect Effects: Cloud Modelling
Secondary ice production: An empirical formulation and organization of mechanisms among simulated cloud-types
Mechanisms for the Influence from Ice Nucleus Aerosols on Clouds and their Indirect Effects: Cloud Modelling
language
English
LU publication?
yes
id
92d1ba6b-882c-4f9a-a0db-3b527f0a1be4
date added to LUP
2022-12-16 11:20:27
date last changed
2023-11-06 06:24:44
@article{92d1ba6b-882c-4f9a-a0db-3b527f0a1be4,
  abstract     = {{<p>A new empirical parameterization (EP) for multiple groups of primary biological aerosol particles (PBAPs) is implemented in the aerosol-cloud model (AC) to investigate their roles as ice nucleating particles (INPs). The EP describes the heterogeneous ice nucleation by (1) fungal spores, (2) bacteria, (3) pollen, (4) detritus of plants, animals, and viruses, and (5) algae. Each group includes fragments from the originally emitted particles. A high-resolution simulation of a midlatitude mesoscale squall line by AC is validated against airborne and ground observations. Sensitivity tests are carried out by varying the initial vertical profiles of the loadings of individual PBAP groups. The resulting changes in warm and ice cloud microphysical parameters are investigated. The changes in warm microphysical parameters, including liquid water content and cloud droplet number concentration, are minimal (&lt;10 %). Overall, PBAPs have little effect on the ice number concentration (&lt;6 %) in the convective region. In the stratiform region, increasing the initial PBAP loadings by a factor of 1000 resulted in less than 40 % change in ice number concentrations. The total ice concentration is mostly controlled by various mechanisms of secondary ice production (SIP). However, when SIP is intentionally shut down in sensitivity tests, increasing the PBAP loading by a factor of 100 has an effect of less than 3 % on the ice phase. Further sensitivity tests revealed that PBAPs have little effect on surface precipitation and on the shortwave and longwave flux (&lt;4 %) for a 100-fold perturbation in PBAPs.</p>}},
  author       = {{Patade, Sachin and Waman, Deepak and Deshmukh, Akash and Gupta, Ashok Kumar and Jadav, Arti and Phillips, Vaughan T.J. and Bansemer, Aaron and Carlin, Jacob and Ryzhkov, Alexander}},
  issn         = {{1680-7316}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{18}},
  pages        = {{12055--12075}},
  publisher    = {{Copernicus GmbH}},
  series       = {{Atmospheric Chemistry and Physics}},
  title        = {{The influence of multiple groups of biological ice nucleating particles on microphysical properties of mixed-phase clouds observed during MC3E}},
  url          = {{http://dx.doi.org/10.5194/acp-22-12055-2022}},
  doi          = {{10.5194/acp-22-12055-2022}},
  volume       = {{22}},
  year         = {{2022}},
}