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Inverse modeling of aerosol dynamics: Condensational growth

Henze, D. K. and Seinfeld, J. H. and Liao, W. and Sandu, A. and Carmichael, G. R. (2004) Inverse modeling of aerosol dynamics: Condensational growth. Journal of Geophysical Research. Atmospheres, 109 (D14). Art. No. D14201. ISSN 2169-897X. doi:10.1029/2004JD004593.

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The feasibility of inverse modeling a multicomponent, size-resolved aerosol evolving by condensation/evaporation is investigated. The adjoint method is applied to the multicomponent aerosol dynamic equation in a box model (zero-dimensional) framework. Both continuous and discrete formulations of the model (the forward equation) and the adjoint are considered. A test example is studied in which the initial aerosol size composition distribution and the pure component vapor concentrations (i.e., vapor pressures) are estimated on the basis of measurements of all species, or a subset of the species, and the entire size distribution, or a portion of the size distribution. It is found that the adjoint method can successfully retrieve the initial size distribution and the pure component vapor concentrations even when only a subset of the species or a portion of the size distribution is observed, although this success is shown to depend upon the form of the initial estimates, the nature of the observations, and the length of the assimilation period. The results presented here provide a basis for the inverse modeling of aerosols in three-dimensional atmospheric chemical transport models.

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Seinfeld, J. H.0000-0003-1344-4068
Additional Information:Copyright 2004 by the American Geophysical Union. Received 2 February 2004; revised 7 May 2004; accepted 14 May 2004; published 17 July 2004. The authors thank the National Science Foundation for supporting this work through the award NSF ITR AP&IM 0205198. The work of A. Sandu was also partially supported by the award NSF CAREER ACI 0093139.
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Subject Keywords:inverse modeling; data assimilation; aerosol dynamics
Issue or Number:D14
Classification Code:0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801); 3260 Mathematical Geophysics: Inverse theory; 3337 Meteorology and Atmospheric Dynamics: Numerical modeling and data assimilation
Record Number:CaltechAUTHORS:20141028-123025415
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Official Citation:Henze, D. K., J. H. Seinfeld, W. Liao, A. Sandu, and G. R. Carmichael (2004), Inverse modeling of aerosol dynamics: Condensational growth, J. Geophys. Res., 109, D14201, doi:10.1029/2004JD004593
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50939
Deposited By: George Porter
Deposited On:28 Oct 2014 20:26
Last Modified:10 Nov 2021 19:03

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