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Title: Use of in situ cloud condensation nuclei, extinction, and aerosol size distribution Measurements to test a method for retrieving cloud condensation nuclei profiles from surface measurements

Abstract

If the aerosol size distribution and composition below cloud are uniform the vertical profile of cloud condensation nuclei concentration can be retrieved entirely from surface measurements, thus providing the potential for long-term measurements. We have used a combination of aircraft, surface in situ, and surface remote sensing measurements to test various aspects of the retrieval scheme. Our analysis leads us to the following conclusions. The CCN retrieval works better than expected if in situ measurements of extinction are used. The retrieval works better for supersaturations of 0.1% than for 1%, because CCN concentrations at 0.1% are controlled by the same particles that control extinction and backscatter. The retrieval of the vertical profile of the humidification factor is not the major limitation of the CCN retrieval scheme. The performance of the retrieval varies significantly from day to day, particularly at 1% supersaturation. Vertical structure in the aerosol size distribution and composition is the dominant source of error in the CCN retrieval.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
962527
Report Number(s):
PNNL-SA-43562
KP1205010
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Geophysical Research. D. (Atmospheres), 111(D05S10)
Country of Publication:
United States
Language:
English

Citation Formats

Ghan, Steven J., Rissman, Tracey A., Elleman, Robert, Ferrare, Richard, Turner, David D., Flynn, Connor J., Wang, Jian, Ogren, J. A., Hudson, James, Jonsson, Haf, VanReken, Timothy, Flagan, Richard C., and Seinfeld, John H. Use of in situ cloud condensation nuclei, extinction, and aerosol size distribution Measurements to test a method for retrieving cloud condensation nuclei profiles from surface measurements. United States: N. p., 2006. Web. doi:10.1029/2004JD005752.
Ghan, Steven J., Rissman, Tracey A., Elleman, Robert, Ferrare, Richard, Turner, David D., Flynn, Connor J., Wang, Jian, Ogren, J. A., Hudson, James, Jonsson, Haf, VanReken, Timothy, Flagan, Richard C., & Seinfeld, John H. Use of in situ cloud condensation nuclei, extinction, and aerosol size distribution Measurements to test a method for retrieving cloud condensation nuclei profiles from surface measurements. United States. doi:10.1029/2004JD005752.
Ghan, Steven J., Rissman, Tracey A., Elleman, Robert, Ferrare, Richard, Turner, David D., Flynn, Connor J., Wang, Jian, Ogren, J. A., Hudson, James, Jonsson, Haf, VanReken, Timothy, Flagan, Richard C., and Seinfeld, John H. Thu . "Use of in situ cloud condensation nuclei, extinction, and aerosol size distribution Measurements to test a method for retrieving cloud condensation nuclei profiles from surface measurements". United States. doi:10.1029/2004JD005752.
@article{osti_962527,
title = {Use of in situ cloud condensation nuclei, extinction, and aerosol size distribution Measurements to test a method for retrieving cloud condensation nuclei profiles from surface measurements},
author = {Ghan, Steven J. and Rissman, Tracey A. and Elleman, Robert and Ferrare, Richard and Turner, David D. and Flynn, Connor J. and Wang, Jian and Ogren, J. A. and Hudson, James and Jonsson, Haf and VanReken, Timothy and Flagan, Richard C. and Seinfeld, John H.},
abstractNote = {If the aerosol size distribution and composition below cloud are uniform the vertical profile of cloud condensation nuclei concentration can be retrieved entirely from surface measurements, thus providing the potential for long-term measurements. We have used a combination of aircraft, surface in situ, and surface remote sensing measurements to test various aspects of the retrieval scheme. Our analysis leads us to the following conclusions. The CCN retrieval works better than expected if in situ measurements of extinction are used. The retrieval works better for supersaturations of 0.1% than for 1%, because CCN concentrations at 0.1% are controlled by the same particles that control extinction and backscatter. The retrieval of the vertical profile of the humidification factor is not the major limitation of the CCN retrieval scheme. The performance of the retrieval varies significantly from day to day, particularly at 1% supersaturation. Vertical structure in the aerosol size distribution and composition is the dominant source of error in the CCN retrieval.},
doi = {10.1029/2004JD005752},
journal = {Journal of Geophysical Research. D. (Atmospheres), 111(D05S10)},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 19 00:00:00 EST 2006},
month = {Thu Jan 19 00:00:00 EST 2006}
}