Dr. Tianfeng Chai
National Oceanic and Atmospheric Administration, USA
Email:
Tianfeng.Chai@noaa.gov
Qualifications
2002 Ph.D.,
The University of Iowa, Iowa City, IA, USA, Mechanical Engineering
1997 M.E., Tsinghua University, Beijing, China, Fluid Mechanics
1994 B.E.,
Tsinghua University, Beijing, China, Engineering Mechanics
1994 B.E., Tsinghua University, Beijing, China, Environmental Engineering
Publications (Selected)
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Impacts of
transported background pollutants on summertime western US air quality: model
evaluation, sensitivity analysis and data assimilation, by Huang, M., G. R.
Carmichael, T. Chai, and others, Atmos. Chem. Phys. Discuss., 12, pp.
15227-15299, 2012.
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Chemical Data Assimilation—An Overview, by Sandu, A. and T. Chai,
Atmosphere, 2(3), pp. 426-463, 2011.
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Ensemble Methods for Dynamic Data Assimilation of Chemical Observations in
Atmospheric Models, by Sandu A, E. M. Constantinescu, G. R. Carmichael, T.
Chai, D. N. Daescu , and J. H. Seinfeld, Journal of Algorithms &
Computational Technology, 5(4), pp. 667-692, 2011.
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Regional NOx emission inversion through a four-dimensional variational
approach using SCIAMACHY tropospheric NO2 column observations, by Chai, T., G.
R. Carmichael, Y. Tang, A. Sandu, A. Heckel, A. Richter, and J. P. Burrows,
Atmospheric Environment, 43(32), pp. 5046-5055, 2009.
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Photosynthetic Control of Atmospheric Carbonyl Sulfide During the Growing
Season, by Campbell, J. E., G. R. Carmichael, T. Chai and others, Science, 322,
pp.1085-1088, 2008.
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A Regional Scale Chemical Transport Modeling of Asian Aerosols with Data
Assimilation of AOD Observations Using Optimal Interpolation Technique, by
Adhikary, B., S. Kulkarni, A. Dallura, Y. Tang, T. Chai, and others,
Atmospheric Environment, 42(37), pp. 8600-8615, 2008.
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An Adjoint Sensitivity Analysis and 4D-Var Data Assimilation Study of
Texas Air Quality, by Zhang, L., E.M. Constantinescu, A. Sandu, Y. Tang, , T.
Chai, and others, Atmospheric Environment,, 42(23), pp. 5787-5804, 2008.
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Predicting Air Quality: Improvements through Advanced Methods to Integrate
Models and Measurements, by Carmichael, G. R., A. Sandu, T. Chai, D. N. Daescu,
E. M. Constantinescu, and Y. Tang, J. Comp. Physics, 227 (7), pp. 3540-3571,
2008
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Autoregressive Models of Background Errors for Chemical Data Assimilation,
by Constantinescu, E. M., T. Chai, A. Sandu, and G. R. Carmichael, J. Geophys.
Res., 112, D12309, doi: 10.1029/2006JD008103, 2007.
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Ensemble-based Chemical Data Assimilation I: General Approach, by
Constantinescu, E. M., A. Sandu, T. Chai, and G. R. Carmichael, Quart. J. Roy.
Meteor. Soc., 133 (206), Part A, pp. 1229-1243, 2007.
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Ensemble-based Chemical Data Assimilation II: Covariance Localization, by
Constantinescu, E. M., A. Sandu, T. Chai, and G. R. Carmichael, submitted to
Quart. J. Roy. Meteor. Soc., 133 (206), Part A, pp. 1244-1256, 2007.
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Improving Regional Ozone Modeling through Systematic Evaluation of Errors
Using the Aircraft Observations during the International Consortium for
Atmospheric Research on Transport and Transformation, by Mena-Carrasco, M., Y. Tang, G. R.
Carmichael, T. Chai, and others, J. Geophys. Res., 112, D12S19,
doi:10.1029/2006JD007762, 2007.
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Four Dimensional Data Assimilation Experiments with ICARTT (International
Consortium for Atmospheric Research on Transport and Transformation) Ozone
Measurements, by Chai, T., G. R. Carmichael, Y. Tang, A. Sandu, M. Hardesty, P.
Pilewskie, S. Whitlow, E. V. Browell, M. A. Avery, P. Nedelec, J. T. Merrill,
A. M. Thompson, and E. Williams, J. Geophys. Res., 112, D12S15,
doi:10.1029/2006JD007763, 2007.
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Influence of Lateral and Top Boundary Conditions on Regional Air Quality
Prediction: a Multi-Scale Study Coupling Regional and Global Chemical Transport
Models, by Tang, Y., G. R. Carmichael, N. Thongboonchoo, T. Chai, and others,
J. Geophys. Res., 112, D10S18, doi:10.1029/2006JD007515, 2007.
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Top-down Estimate of Mercury Emissions in China Using Four-dimensional
Variational Data Assimilation, by Pan, L., T. Chai, and others, Atmospheric
Environment, 41(13), pp. 2804-2819, 2007.
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Analysis of Anthropogenic CO2 Signal in ICARTT Observations Using a
Regional Chemical Transport Model and its Adjoint, by Campbell, J.E., C.O.
Stanier, G.R. Carmichael, Y. Tang, T. Chai, and others, Tellus B, 59, pp.
199-210, 2007.
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Assessment of Ensemble-based Chemical Data Assimilation in An Idealized
Setting, by Constantinescu, E. M., A.
Sandu, T. Chai, and G. R. Carmichael, Atmospheric Environment, 41 (1), pp.
18-36, 2007.
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Adjoint Sensitivity Analysis of Ozone Non-attainment over the Continental
United States, by Hakami, A., J. H.
Seinfeld, T. Chai, Y. Tang, G. R. Carmichael, and A. Sandu, Environmental
Science & Technology, 40 (12), pp. 3855-3864, 2006.
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Singular Vector Analysis for Atmospheric Chemical Thransport Models, by
Liao, W. A. Sandu, G. R. Carmichael, and T. Chai, Monthly Weather Review, 134
(9), pp. 2443–2465, doi:10.1175/MWR3158.1, 2006.
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Chemical Data Assimilation with TRACE-P Flight Measurements, by Chai, T.,
G. R. Carmichael, A. Sandu, Y. Tang, and D. N. Daescu, J. Geophys. Res., 111,
D02301, doi:10.1029/2005JD005883, 2006.
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Adjoint Inverse Modeling of Black Carbon During the Asian Pacific Regional
Aerosol Characterization Experiment, by Hakami, A., D. K. Henze, J. H.
Seinfeld, T. Chai, Y. Tang, G. R. Carmichael, and A. Sandul, J. Geophys. Res.,
110, D14301, doi:10.1029/2004JD005671, 2005
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Adjoint Sensitivity Analysis of Regional Air Quality Models, by Sandu, A.,
D. N. Daescu, G. R. Carmichael, and T. Chai, J. Comp. Physics, 204 (1), pp.
222-252, 2005.
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Retrieval of Micro-scale Flow Structures from High Resolution Doppler
Lidar Radial Velocity Data Using Adjoint Method, by Chai, T., C.-L. Lin, and R.
Newsom, J. Atmos. Sci., 61 (13), pp. 1500-1520, 2004.
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Optimization of Turbulent Viscosity and Diffusivity in Adjoint Recovery of
Atmospheric Boundary Layer Flow Structures, by Chai, T., and C.-L. Lin,
Multiscale Modeling and Simulation, 1(2), pp. 196-220, 2003.
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On Smoothness Constraints for Four-Dimensional Data Assimilation, by Lin,
C.-L., T. Chai, and J. Sun, J. Comp. Physics, 181(2), pp. 430-453, 2002.
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Evaluation of the United States National Air Quality Forecast Capability experimental real-time predictions in 2010 using Air
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Quality System ozone and NO2 measurements, by Chai, T., H. Kim, P. Pius, D. Tong, L. Pan, Y. Tang, J. Huang, J. McQueen, M. Tsidulko, and I. Stajner, Geosci. Model Dev., 6, 1831-1850, doi:10.5194/gmd-6-1831-2013, previous discussion paper, in Geosci. Model Dev. Discuss., 6, 2609-2654, doi: 10.5194/gmdd-6-2609-2013, 2013.
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Impacts of transported background pollutants on summertime western US air quality: model evaluation, sensitivity analysis and data assimilation, by Huang, M., G. R. Carmichael, T. Chai, and others, Atmos. Chem. Phys., 13, 359-391, doi:10.5194/acp-13-359-2013.
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