Aerosol-cloud drop concentration closure for clouds sampled during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign

Christos Fountoukis, Athanasios Nenes, Nicholas Meskhidze, Roya Bahreini, William C. Conant, Haflidi Jonsson, Shane Murphy, Armin Sorooshian, Varuntida Varutbangkul, Fred Brechtel, Richard C. Flagan, John H. Seinfeld

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

This study analyzes 27 cumuliform and stratiform clouds sampled aboard the CIRPAS Twin Otter during the 2004 International Consortium for Atmospheric Research on Transport and Transformation (ICARTT) experiment. The data set was used to assess cloud droplet closure using (1) a detailed adiabatic cloud parcel model and (2) a state-of-the-art cloud droplet activation parameterization. A unique feature of the data set is the sampling of highly polluted clouds within the vicinity of power plant plumes. Remarkable closure was achieved (much less than the 20% measurement uncertainty) for both parcel model and parameterization. The highly variable aerosol did not complicate the cloud droplet closure, since the clouds had low maximum supersaturation and were not sensitive to aerosol variations (which took place at small particle sizes). The error in predicted cloud droplet concentration was mostly sensitive to updraft velocity. Optimal closure is obtained if the water vapor uptake coefficient is equal to 0.06, but can range between 0.03 and 1.0. The sensitivity of cloud droplet prediction error to changes in the uptake coefficient, organic solubility and surface tension depression suggest that organics exhibit limited solubility. These findings can serve as much needed constraints in modeling of aerosol-cloud interactions in the North America; future in situ studies will determine the robustness of our findings.

Original languageEnglish
Article numberD10S30
JournalJournal of Geophysical Research Atmospheres
Volume112
Issue number10
DOIs
Publication statusPublished - 27 May 2007
Externally publishedYes

Fingerprint

volcanic cloud
cloud droplet
Aerosols
closures
aerosols
Parameterization
parameterization
solubility
Solubility
aerosol
stratiform cloud
Supersaturation
updraft
Steam
surface tension
supersaturation
Surface tension
power plant
water vapor
Power plants

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography

Cite this

Aerosol-cloud drop concentration closure for clouds sampled during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign. / Fountoukis, Christos; Nenes, Athanasios; Meskhidze, Nicholas; Bahreini, Roya; Conant, William C.; Jonsson, Haflidi; Murphy, Shane; Sorooshian, Armin; Varutbangkul, Varuntida; Brechtel, Fred; Flagan, Richard C.; Seinfeld, John H.

In: Journal of Geophysical Research Atmospheres, Vol. 112, No. 10, D10S30, 27.05.2007.

Research output: Contribution to journalArticle

Fountoukis, C, Nenes, A, Meskhidze, N, Bahreini, R, Conant, WC, Jonsson, H, Murphy, S, Sorooshian, A, Varutbangkul, V, Brechtel, F, Flagan, RC & Seinfeld, JH 2007, 'Aerosol-cloud drop concentration closure for clouds sampled during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign', Journal of Geophysical Research Atmospheres, vol. 112, no. 10, D10S30. https://doi.org/10.1029/2006JD007272
Fountoukis, Christos ; Nenes, Athanasios ; Meskhidze, Nicholas ; Bahreini, Roya ; Conant, William C. ; Jonsson, Haflidi ; Murphy, Shane ; Sorooshian, Armin ; Varutbangkul, Varuntida ; Brechtel, Fred ; Flagan, Richard C. ; Seinfeld, John H. / Aerosol-cloud drop concentration closure for clouds sampled during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign. In: Journal of Geophysical Research Atmospheres. 2007 ; Vol. 112, No. 10.
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