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Inversion of aerosol data from the epiphaniometer

Pandis, Spyros N. and Baltensperger, Urs and Wolfenbarger, J. Kenneth and Seinfeld, John H. (1991) Inversion of aerosol data from the epiphaniometer. Journal of Aerosol Science, 22 (4). pp. 417-428. ISSN 0021-8502. doi:10.1016/0021-8502(91)90002-y.

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The epiphaniometer is a new instrument for continuous monitoring of the Fuchs surface of aerosol particles using the attachment of neutral radioactive ²¹¹Pb atoms to the particles. Since the ²¹¹Pb atoms have a half-life of 36.1 min, the ability of the epiphaniometer to detect short-term fluctuations in the Fuchs surface of the aerosol is limited. To overcome this drawback a general algorithm developed for the inversion of size distribution data from conventional aerosol instruments is adapted for the inversion of data from the epiphaniometer. This algorithm allows resolution of dramatic changes in the aerosol Fuchs surface occurring over a time scale of minutes. The method is applied to data collected during outdoor smog chamber experiments, with changes in aerosol concentration of several orders of magnitude occurring within a time period of 5 min. The inverted epiphaniometer data are in agreement with the corresponding data from a Scanning Electrical Mobility Spectrometer (SEMS) and an Optical Particle Counter.

Item Type:Article
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URLURL TypeDescription
Pandis, Spyros N.0000-0001-8085-9795
Baltensperger, Urs0000-0003-0079-8713
Seinfeld, John H.0000-0003-1344-4068
Additional Information:We thank S E Paulson for her help in performing the smog chamber experiments. This work was supported by the Swiss National Science Foundation.
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)UNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20230304-774985600.2
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:119646
Deposited By: Tony Diaz
Deposited On:06 Mar 2023 18:36
Last Modified:06 Mar 2023 18:36

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