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Award Abstract #0205198
ITR: Development of a General Computational Framework for the Optimal Integration of Atmospheric Chemical Transport Models and Measurements Using Adjoints


NSF Org: AGS
Division of Atmospheric and Geospace Sciences
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Initial Amendment Date: August 15, 2002
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Latest Amendment Date: July 31, 2006
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Award Number: 0205198
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Award Instrument: Standard Grant
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Program Manager: Anne-Marie Schmoltner
AGS Division of Atmospheric and Geospace Sciences
GEO Directorate for Geosciences
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Start Date: September 1, 2002
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Expires: August 31, 2008 (Estimated)
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Awarded Amount to Date: $2299997
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Investigator(s): Gregory Carmichael gcarmich@engineering.uiowa.edu (Principal Investigator)
John Seinfeld (Co-Principal Investigator)
Adrian Sandu (Co-Principal Investigator)
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Sponsor: University of Iowa
2 GILMORE HALL
IOWA CITY, IA 52242 319/335-2123
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NSF Program(s): ITR MEDIUM (GROUP) GRANTS
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Field Application(s): 0000099 Other Applications NEC
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Program Reference Code(s): OTHR, 4444, 1687, 1661, 1652, 1524, 0000
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Program Element Code(s): 1687

ABSTRACT

The overall goal of this project is to develop general computational tools, and associated software, for assimilation of atmospheric chemical and optical measurements into chemical transport models (CTMs). These tools are to be developed so that users need not be experts in adjoint modeling and optimization theory. These developments will foster a deeper understanding of: (1) inaccuracies in CTMs; (2) sensitivities of CTMs input and parameter uncertainties; and (3) the comparison of model predictions and atmospheric measurements. These computational tools have the promise to move the field of atmospheric chemical modeling to the next plateau of understanding the extent to which model predictions encompass available measurements, an understanding that is currently hampered by the absence of systematic theory and general analysis tools. These techniques and analysis tools will be applied both to the interpretation of observational data and to forecasting activities.



The research approach will entail: (1) Development of novel and efficient algorithms for 4-dimensional-Var data assimilation in CTMs; (2) Development of general software support tools to facilitate the construction of discrete adjoints to be used in any CTM; and (3) Application of these techniques to important applications including: (a) analysis of emission control strategies for Los Angeles; (b) the integration of measurements and models to produce a consistent/optimal analysis data set for the ACE-Asia intensive field experiment; (c) the inverse analysis to produce a better estimate of emissions; and (d) the design of observation strategies to improve chemical forecasting capabilities.

The objective of this project is the development and utilization of Information Technology Research (ITR) tools to integrate measurement and modeling analysis with the goal of providing an optimal analysis state of the atmosphere, that is an intimate and close integration of modeled and measured quantities. This improved estimate of the state better defines the spatial and temporal fields of key chemical components in relation to their sources and sinks. This information is critical in designing cost-effective emission control strategies for improved air quality, for the interpretation of observational data such as those obtained during intensive field campaigns, and to the execution of air-quality forecasting. The development of the tools to integrate measurements and models is also critical to the challenge of a full utilization of the vast amounts of satellite chemical data in the troposphere that are now becoming available, and which will become more prevalent in the coming years. In addition to these broader impacts in the fields of information technology, atmospheric chemistry, air quality, and global change, this project will provide opportunities for students and post-docs to participate in a highly interdisciplinary and collaborative activity.


PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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A. Hakami, J.H. Seinfeld, T. Chai, Y. Tang, G.R. Carmichael, A. Sandu. "Adjoint Sensitivity Analysis of Ozone Non-attainment over the Continental United States," Environmental Science and Technology, v.40, 2006, p. 3855.

A. Sandu. "Piecewise Polynomial Solutions of Aerosol Dynamics," Aerosol Science and Technology, v.40, 2006, p. 1.

A. Sandu, R. Sander. "Simulating Chemical Kinetic Systems in Fortran 90 and Matlab with the Kinetic PreProcessor KPP-2.1," Atmospheric Chemistry and Physics, v.6, 2006, p. 187.

Anderson, J., A.F. Arellano, K. Raeder, and P.G. Hess. "Ensemble-Based Chemical Data Assimilaiton in a Global Atmospheric Model," EOS Trans, v.87(52), 2006, p. A31A-8060.

Anderson, T., R.J. Charlson, N. Bellouin, O.Boucher, M. Chin, S.A. Christopher, J. Haywood, Y. Kaufman, S. Kinne, J.A. Ogren, L.A. Remer, T. Takemura, D. Tanre, C.R. Trepte, B.A. Wielicki, D.M. Winker, H. Yu. "An 'A-Train' Strategy for Quantifying Direct Climate Forcing by Anthropogenic Aerosols," Bulletin American Meteorological Society, 2005.

Anderson, T., Y. Wu, D.A. Chu, B. Schmid, J. Redemann, O. Dubovik. "Testing the MODIS Satellite Retrieval of Aerosol Fine-Mode Fraction," Journal Geophysical Research, 2005.

Arimoto, R., Y.J. Kim, Y.P. Kim, P.K. Quinn, T.S. Bates, T.L. Anderson, S. Gong, I. Uno, M. Chin, B.J. Huebert, A.D. Clarke, Y. Shinozuka, R. Weber, J. Anderson, S.A. Guazzotti, R.C. Sullivan, D.A. Sodeman, K.A. Prather, I. Sokolik. "Characterization of Asian Dusst During ACE-Asia," Journal Geophysical Research, 2005.

Arimoto, R., Y.J. Kim, Y.P. Kim, P.K. Quinn, T.S. Bates, T.L. Anderson, S. Gong, I. Uno, M. Chin, B.J. Huebert, A.D. Clarke, Y. Shinozuka, R. Weber, J. Anderson, S.A. Guazzotti, R.C. Sullivan, D.A. Sodeman, K.A. Prather, I. Sokolik. "Characterization of Asian Dust During ACE-Asia," Journal Geophysical Research, 2005.

Bates, T., T. Anderson, T. Bond, O. Boucher, G. Carmichael, A. Clarke, K. Duckenfield, C. Erlick, L. Horowitz, H. Maring, A. McComiskey, A. Middlebrook, K. Noone, J. Ogren, J. Penner, A.R. Ravishankara, D.L. Savoie, S. Schwartz, P.K. Quinn and R.J. Weber. "Aerosol Direct Radiative Forcing Over the Northwest Atlantic, Northwest Pacific, and North Indian Oceans: Estimates based on In-Situ Chemical and Optical Measurements and Chemical Transport Modeling," Atmospheric Chemistry and Physics, 2005.

Campbell, J.E., C.O. Stanier, G.R. Carmichael, Y. Tang, T. Chai, S. Vay, Y.H. Choi, G.W. Sachse, H.B. Singh, J-H. Woo, J.M. Vukovich, D.G. Streets, and J.L. Schnoor. "Analysis of Anthropogenic CO2 Signal in ICARTT Observations Using a Regional Chemical Transport Model and its Adjoint," Tellus B, v.59, 2007, p. 199.


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Last Updated:April 2, 2007