skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Do Ultrafine Cloud Condensation Nuclei Invigorate Deep Convection?

Abstract

Numerical simulations of the impact of ultrafine cloud condensation nuclei (CCN) on deep convection are analyzed herein to investigate the idea proposed by Fan et al. that addition of ultrafine CCN to an otherwise pristine environment leads to convective invigoration. The piggybacking methodology is applied, allowing rigorous separation of the impact of aerosols from different flow realizations that typically occur when even a small element of the model physics or modeling setup is changed. The setup follows the case of daytime convective development over land based on observations during the Large-Scale Biosphere–Atmosphere (LBA) experiment in Amazonia. Overall, the simulated impacts of ultrafine CCN are similar to the previous study by the authors on the impact of pollution on deep convection. There is no convective invigoration above the freezing level, but there is a small invigoration (increase in vertical velocities) below due to the supersaturation and buoyancy differences in conditions with additional ultrafine CCN compared to unperturbed pristine conditions. As in the previous study, the most significant impact is on the upper-tropospheric convective anvils that feature higher cloud fractions in conditions with ultrafine CCN. The increase comes from purely microphysical considerations as the increased cloud droplet concentrations from ultrafine CCN leadmore » to increased ice crystal concentrations and, consequently, smaller sizes and fall velocities, and longer residence times. Mesoscale organization due to low-level shear has a small effect on the simulated ultrafine CCN impacts. Finally, an alternative explanation of increased lightning above oceanic shipping lines seen in satellite observations and argued to result from convective invigoration is provided.« less

Authors:
 [1];  [1]
  1. National Center for Atmospheric Research, Boulder, CO (United States)
Publication Date:
Research Org.:
University Corporation for Atmospheric Research, Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
OSTI Identifier:
1657808
Grant/Contract Number:  
SC0016476; SC0020104; SC0020118
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Atmospheric Sciences
Additional Journal Information:
Journal Volume: 77; Journal Issue: 7; Journal ID: ISSN 0022-4928
Publisher:
American Meteorological Society
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Cloud microphysics; Cumulus clouds; Cloud resolving models

Citation Formats

Grabowski, Wojciech W., and Morrison, Hugh. Do Ultrafine Cloud Condensation Nuclei Invigorate Deep Convection?. United States: N. p., 2020. Web. https://doi.org/10.1175/jas-d-20-0012.1.
Grabowski, Wojciech W., & Morrison, Hugh. Do Ultrafine Cloud Condensation Nuclei Invigorate Deep Convection?. United States. https://doi.org/10.1175/jas-d-20-0012.1
Grabowski, Wojciech W., and Morrison, Hugh. Wed . "Do Ultrafine Cloud Condensation Nuclei Invigorate Deep Convection?". United States. https://doi.org/10.1175/jas-d-20-0012.1. https://www.osti.gov/servlets/purl/1657808.
@article{osti_1657808,
title = {Do Ultrafine Cloud Condensation Nuclei Invigorate Deep Convection?},
author = {Grabowski, Wojciech W. and Morrison, Hugh},
abstractNote = {Numerical simulations of the impact of ultrafine cloud condensation nuclei (CCN) on deep convection are analyzed herein to investigate the idea proposed by Fan et al. that addition of ultrafine CCN to an otherwise pristine environment leads to convective invigoration. The piggybacking methodology is applied, allowing rigorous separation of the impact of aerosols from different flow realizations that typically occur when even a small element of the model physics or modeling setup is changed. The setup follows the case of daytime convective development over land based on observations during the Large-Scale Biosphere–Atmosphere (LBA) experiment in Amazonia. Overall, the simulated impacts of ultrafine CCN are similar to the previous study by the authors on the impact of pollution on deep convection. There is no convective invigoration above the freezing level, but there is a small invigoration (increase in vertical velocities) below due to the supersaturation and buoyancy differences in conditions with additional ultrafine CCN compared to unperturbed pristine conditions. As in the previous study, the most significant impact is on the upper-tropospheric convective anvils that feature higher cloud fractions in conditions with ultrafine CCN. The increase comes from purely microphysical considerations as the increased cloud droplet concentrations from ultrafine CCN lead to increased ice crystal concentrations and, consequently, smaller sizes and fall velocities, and longer residence times. Mesoscale organization due to low-level shear has a small effect on the simulated ultrafine CCN impacts. Finally, an alternative explanation of increased lightning above oceanic shipping lines seen in satellite observations and argued to result from convective invigoration is provided.},
doi = {10.1175/jas-d-20-0012.1},
journal = {Journal of the Atmospheric Sciences},
number = 7,
volume = 77,
place = {United States},
year = {2020},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share:

Works referenced in this record:

The Supercooling of Water
journal, August 1953


Locally Enhanced Aerosols Over a Shipping Lane Produce Convective Invigoration but Weak Overall Indirect Effects in Cloud-Resolving Simulations
journal, September 2018

  • Blossey, Peter N.; Bretherton, Christopher S.; Thornton, Joel A.
  • Geophysical Research Letters, Vol. 45, Issue 17
  • DOI: 10.1029/2018GL078682

Influence of the Subcloud Layer on the Development of a Deep Convective Ensemble
journal, September 2012

  • Böing, Steven J.; Jonker, Harm J. J.; Siebesma, A. Pier
  • Journal of the Atmospheric Sciences, Vol. 69, Issue 9
  • DOI: 10.1175/JAS-D-11-0317.1

Thunderstorm Structure and Circulation
journal, June 1948


How do changes in warm-phase microphysics affect deep convective clouds?
journal, January 2017

  • Chen, Qian; Koren, Ilan; Altaratz, Orit
  • Atmospheric Chemistry and Physics, Vol. 17, Issue 15
  • DOI: 10.5194/acp-17-9585-2017

Dominant role by vertical wind shear in regulating aerosol effects on deep convective clouds
journal, January 2009

  • Fan, Jiwen; Yuan, Tianle; Comstock, Jennifer M.
  • Journal of Geophysical Research, Vol. 114, Issue D22
  • DOI: 10.1029/2009JD012352

Microphysical effects determine macrophysical response for aerosol impacts on deep convective clouds
journal, November 2013

  • Fan, J.; Leung, L. R.; Rosenfeld, D.
  • Proceedings of the National Academy of Sciences, Vol. 110, Issue 48
  • DOI: 10.1073/pnas.1316830110

Review of Aerosol–Cloud Interactions: Mechanisms, Significance, and Challenges
journal, November 2016

  • Fan, Jiwen; Wang, Yuan; Rosenfeld, Daniel
  • Journal of the Atmospheric Sciences, Vol. 73, Issue 11
  • DOI: 10.1175/JAS-D-16-0037.1

Substantial convection and precipitation enhancements by ultrafine aerosol particles
journal, January 2018


Factors Responsible for Precipitation Efficiencies in Midlatitude and Tropical Squall Simulations
journal, October 1996


Can the Impact of Aerosols on Deep Convection be Isolated from Meteorological Effects in Atmospheric Observations?
journal, October 2018


Separating physical impacts from natural variability using piggybacking technique
journal, January 2019


Growth of Cloud Droplets in a Turbulent Environment
journal, January 2013


Modeling Condensation in Shallow Nonprecipitating Convection
journal, December 2015

  • Grabowski, Wojciech W.; Jarecka, Dorota
  • Journal of the Atmospheric Sciences, Vol. 72, Issue 12
  • DOI: 10.1175/JAS-D-15-0091.1

Untangling Microphysical Impacts on Deep Convection Applying a Novel Modeling Methodology. Part II: Double-Moment Microphysics
journal, September 2016

  • Grabowski, Wojciech W.; Morrison, Hugh
  • Journal of the Atmospheric Sciences, Vol. 73, Issue 9
  • DOI: 10.1175/JAS-D-15-0367.1

Modeling Condensation in Deep Convection
journal, July 2017

  • Grabowski, Wojciech W.; Morrison, Hugh
  • Journal of the Atmospheric Sciences, Vol. 74, Issue 7
  • DOI: 10.1175/JAS-D-16-0255.1

Separating Dynamic and Thermodynamic Impacts of Climate Change on Daytime Convective Development over Land
journal, August 2019


Daytime convective development over land: A model intercomparison based on LBA observations
journal, January 2006

  • Grabowski, W. W.; Bechtold, P.; Cheng, A.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 132, Issue 615
  • DOI: 10.1256/qj.04.147

Macroscopic impacts of cloud and precipitation processes on maritime shallow convection as simulated by a large eddy simulation model with bin microphysics
journal, January 2015

  • Grabowski, W. W.; Wang, L. -P.; Prabha, T. V.
  • Atmospheric Chemistry and Physics, Vol. 15, Issue 2
  • DOI: 10.5194/acp-15-913-2015

Make It a Double? Sobering Results from Simulations Using Single-Moment Microphysics Schemes
journal, February 2015

  • Igel, Adele L.; Igel, Matthew R.; van den Heever, Susan C.
  • Journal of the Atmospheric Sciences, Vol. 72, Issue 2
  • DOI: 10.1175/JAS-D-14-0107.1

Aerosol impact on the dynamics and microphysics of deep convective clouds
journal, October 2005

  • Khain, A.; Rosenfeld, D.; Pokrovsky, A.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 131, Issue 611
  • DOI: 10.1256/qj.04.62

Aerosol-induced changes of convective cloud anvils produce strong climate warming
journal, January 2010

  • Koren, I.; Remer, L. A.; Altaratz, O.
  • Atmospheric Chemistry and Physics, Vol. 10, Issue 10
  • DOI: 10.5194/acp-10-5001-2010

The invigoration of deep convective clouds over the Atlantic: aerosol effect, meteorology or retrieval artifact?
journal, January 2010

  • Koren, I.; Feingold, G.; Remer, L. A.
  • Atmospheric Chemistry and Physics, Vol. 10, Issue 18
  • DOI: 10.5194/acp-10-8855-2010

A Numerical Study of the Effects of Ambient Flow and Shear On Density Currents
journal, October 1996


New Primary Ice-Nucleation Parameterizations in an Explicit Cloud Model
journal, July 1992


Mesoscale Modeling of Springtime Arctic Mixed-Phase Stratiform Clouds Using a New Two-Moment Bulk Microphysics Scheme
journal, October 2005

  • Morrison, H.; Pinto, J. O.
  • Journal of the Atmospheric Sciences, Vol. 62, Issue 10
  • DOI: 10.1175/JAS3564.1

Comparison of Bulk and Bin Warm-Rain Microphysics Models Using a Kinematic Framework
journal, August 2007

  • Morrison, Hugh; Grabowski, Wojciech W.
  • Journal of the Atmospheric Sciences, Vol. 64, Issue 8
  • DOI: 10.1175/JAS3980

Modeling Supersaturation and Subgrid-Scale Mixing with Two-Moment Bulk Warm Microphysics
journal, March 2008

  • Morrison, Hugh; Grabowski, Wojciech W.
  • Journal of the Atmospheric Sciences, Vol. 65, Issue 3
  • DOI: 10.1175/2007JAS2374.1

A Novel Approach for Representing Ice Microphysics in Models: Description and Tests Using a Kinematic Framework
journal, May 2008

  • Morrison, Hugh; Grabowski, Wojciech W.
  • Journal of the Atmospheric Sciences, Vol. 65, Issue 5
  • DOI: 10.1175/2007JAS2491.1

Cloud-system resolving model simulations of aerosol indirect effects on tropical deep convection and its thermodynamic environment
journal, January 2011


Response of Tropical Deep Convection to Localized Heating Perturbations: Implications for Aerosol-Induced Convective Invigoration
journal, November 2013

  • Morrison, Hugh; Grabowski, Wojciech W.
  • Journal of the Atmospheric Sciences, Vol. 70, Issue 11
  • DOI: 10.1175/JAS-D-13-027.1

The Radiative Forcing of Aerosol–Cloud Interactions in Liquid Clouds: Wrestling and Embracing Uncertainty
journal, February 2018


A cloud-resolving model study of aerosol-cloud correlation in a pristine maritime environment: A CRM Study of Aerosol-Cloud Correlation
journal, June 2017

  • Nishant, Nidhi; Sherwood, Steven C.
  • Geophysical Research Letters, Vol. 44, Issue 11
  • DOI: 10.1002/2017GL073267

Variability of the Supersaturation in Cumulus Clouds
journal, June 1988


Flood or Drought: How Do Aerosols Affect Precipitation?
journal, September 2008


A Theory for Strong, Long-Lived Squall Lines
journal, February 1988


Influence of local circulations on wind, moisture, and precipitation close to Manaus City, Amazon Region, Brazil
journal, December 2014

  • dos Santos, Mercel J.; Silva Dias, Maria A. F.; Freitas, Edmilson D.
  • Journal of Geophysical Research: Atmospheres, Vol. 119, Issue 23
  • DOI: 10.1002/2014JD021969

Aerosol-cloud-precipitation effects over Germany as simulated by a convective-scale numerical weather prediction model
journal, January 2012

  • Seifert, A.; Köhler, C.; Beheng, K. D.
  • Atmospheric Chemistry and Physics, Vol. 12, Issue 2
  • DOI: 10.5194/acp-12-709-2012

Impact of aerosols on convective clouds and precipitation: AEROSOL IMPACT ON CONVECTIVE CLOUDS
journal, April 2012

  • Tao, Wei-Kuo; Chen, Jen-Ping; Li, Zhanqing
  • Reviews of Geophysics, Vol. 50, Issue 2
  • DOI: 10.1029/2011RG000369

The effects of aerosols on precipitation and dimensions of subtropical clouds: a sensitivity study using a numerical cloud model
journal, January 2006


Lightning enhancement over major oceanic shipping lanes: Lightning Over Shipping Lanes
journal, September 2017

  • Thornton, Joel A.; Virts, Katrina S.; Holzworth, Robert H.
  • Geophysical Research Letters, Vol. 44, Issue 17
  • DOI: 10.1002/2017GL074982

Erroneous Attribution of Deep Convective Invigoration to Aerosol Concentration
journal, April 2018


What Controls the Transition from Shallow to Deep Convection?
journal, June 2009

  • Wu, Chien-Ming; Stevens, Bjorn; Arakawa, Akio
  • Journal of the Atmospheric Sciences, Vol. 66, Issue 6
  • DOI: 10.1175/2008JAS2945.1