Biography

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)

  1. 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.
  2. Chemical Data Assimilation—An Overview, by Sandu, A. and T. Chai, Atmosphere, 2(3), pp. 426-463, 2011.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. 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.
  8. 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
  9. 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.
  10. 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.
  11. 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.
  12. 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.
  13. 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.
  14. 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.
  15. 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.
  16. 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.
  17. 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.
  18. 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.
  19. 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.
  20. 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.
  21. 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
  22. 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.
  23. 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.
  24. 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.
  25. 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.
  26. Evaluation of the United States National Air Quality Forecast Capability experimental real-time predictions in 2010 using Air
  27. 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.
  28. 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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