Senior Research Fellow


Jason Ching has been involved with meteorological and air quality research field studies and modeling at NOAA and the US EPA for 40 years until his retirement at the end of 2010. In the early years with NOAA, he participated in major field studies such as the Barbados Oceanic and Meteorology Experiments (BOMEX), the International Field Year of the Great Lakes (IFYGL) and the GARP Global Atlantic Tropical Experiment (GATE). In the succeeding years at the EPA, he led the urban boundary layer sub-project of the Regional Air Pollution Study (RAPS); then at regional scales, led the (a) 1978 Tennessee Plume Study (b) 1979 and 2000 Northeast Regional Oxidant Studies (NEROS), and the 1987-1989 Eulerian Model Evaluation Field Study (EMEFS) for the Regional Acid Deposition Model (RADM). In the 1980s he transitioned to air quality model development programs including the EPA’s Regional Oxidant Model (ROM), Regional Acid Deposition Model (RADM) (and its meteorological driver MM5), and Regional Particulate Model (RPM). In 1990, he initiated and implemented the prototypic Community Multiscale Air Quality Modeling (CMAQ), a system now accepted and widely used by the international air quality modeling community, especially as a decision support system for air quality issues. He has used CMAQ and its meteorological models (MM5 and WRF) to address advanced urban-to-fine scale air quality and meteorological modeling applications leading to the development of the prototype National Urban Database and Access Portal Tools, NUDAPT.

Currently, as a senior research collaborator at the Institute for the Environment, he continues to be engaged and perform research with a focus on fine grid and urban scale modeling. He initiated, and as PI, is engaged in innovative collaborations with members of the IAUC (and others) towards the goal of extending NUDAPT concept to worldwide coverage. This community-based, rapidly evolving and growing project and highly collaborative project is called World Urban Database and Access Portal Tools (WUDAPT).

Professional Experience

2011-2013  Faculty Fellowship Program at UCAR (Urban database, Fine grid scale modeling)

2011 to present Senior Research Fellow at University of North Carolina at Chapel Hill

2008- 2010 Physical Scientist, EPA (NERL/AMD), RTP, NC (Retired 12/2010)

1975- 2008 Meteorologist, NOAA/ARL/ASMD (on assignment to EPA (NERL/AMD), RTP, NC

1990-1998 Chief, Atmospheric Model Development Branch, NOAA/ARL/ASMD (NERL/AMD), RTP, NC

1970-1975 Meteorologist, NOAA/ARL assigned to BOMAPIFYGL-GATE Project Offices, Washington DC

1964-1966 Meteorologist, Woods Hole Oceanographic Institute, Woods Hole, Massachusetts


Ph.D., Atmospheric Science, University of Washington, Seattle, WA, 1974

M.S., Meteorology, Penn State University, University Park, PA, 1964

B.S., Meteorology, University of Hawaii, Honolulu, HI, 1962

Selected Publications

Ching.J., G. Mills, B. Bechtel, L See, J. Feddema, X. Wang, C. Ren, O. Brousse, A. Martilli, M. Neophytou, I. Stewart, A. Hanna, E. Ng, M. Foley, P. Alexander, J. Hidalgo, V. Masson, D. Aliaga, D. Niyogi, M. Andrade, A. Sreevestava, A. Baklanov, J. Fung,  P. Mouzourides, P. Bhalachandran, J. Dai, W. Dai, K. Hammerberg, G. Milcinski, M. Demuzere, N. Brunsell, M Pesaresi, S. Miao, F. Chen, 2018, World Urban Database and Access Portal Tools (WUDAPT), an urban weather, climate and environmental modeling infrastructure for the Anthropocene, Bulletin of AMS.

Ching J, G. Mills, L. See,  B. Bechtel, J. Feddema, I. Stewart, A. Hanna,  2014: WUDAPT (World Urban Database and Access Portal Tools) an International Collaborative Project for Climate Relevant Physical Geography Data for the World’s Cities, 94th AMS Annual Meeting,  New Orleans, LA

Bechtel, B., Alexander, P., Böhner, J., Ching, J., Conrad, O., Feddema, J., Mills, G., See, L. and Stewart, I. 2015. Mapping local climate zones for a worldwide database of form and function of cities. International Journal of Geographic Information, 4(1), 199-219. doi:10.3390/ijgi4010199.

Mills, G., Ching, J., See, L., Bechtel, B., Feddema, J., Masson, V., Stewart, I., Neophytou, M., O’Connor, M., Chen, F., Martilli, A., Grimmond, S., Alexander, P., Foley, M., Gal, T., Wang, X., Mitra, C., Pereira, N., Steeneveld, G.-J.  Introduction to the WUDAPT Project, Proceedings, 9th International Conference on Urban Climate (jointly with 12th Symposium on the Urban Environment), Toulouse, France, July, 2015.

Ching, J., R. Rotunno, M. Lemone, A. Martilli, B. Kosovic, P.A. Jimenez, and J. Dudhia, 2014:  Convectively induced secondary circulations in find-grid mesoscale numerical weather prediction models, Monthly Weather Review (142) 3284-3302.

Ching J, G. Mills, L. See, P. Alexander, B. Bechtel, J. Feddema, K. Oleson, I. Stewart, M Neophytou, F. Chen, W. Wang, A. Hanna, 2014: WUDAPT: Facilitating advanced urban canopy modeling for weather, climate and air quality applications, Extended Abstract, 94th AMS Annual Meeting, Atlanta, GA.

Ching, J., 2013:  A perspective on urban canopy layer modeling for weather, climate and air quality applications, Urban Climate, 3: 13-39.

Burian, S., and Jason Ching, 2010: Development of Gridded Fields of Urban Canopy Parameters for Advanced Urban Meteorological and Air Quality Models. Project Report: EPA/600/R-10/007

Ching, Jason, Michael Brown, Steven Burian, Fei Chen, Ron Cionco, Adel Hanna, Torrin Hultgren, Timothy McPherson, David Sailor, Haider Taha, and David Williams: “National Urban Database and Access Portal Tool (NUDAPT): (2009) Bulletin of American Meteorological Society, Vol 90(08)  p1157-1168.

Ching,Jason, J.Herwehe and J. Swall: On joint deterministic grid modeling and sub-grid variability conceptual framework for model evaluation, Atmospheric Environment, 40 (2006) 4935-4945.

Dupont, Sylvain, Tanya L. Otte, and Jason K.S. Ching, 2004:  Simulation of meteorological fields within and above urban and rural canopies with a mesoscale model (MM5) Boundary Layer Meteor., 2004 113: 111-158.

U.S. Environmental Protection Agency. Science algorithms of the EPA Models3 Community Multiscale Air Quality (CMAQ) modeling system. D.W. Byun, and J.K.S. Ching (Eds.).  EPA600/R99/030, National Exposure Research Laboratory, RTP, NC (1999).

Ching, J.K.S., 1985: Urban scale variations of turbulence parameters and fluxes.  Boundary Layer Meteorol., 33(4):335362.

Ching, J.K.S., J. F. Clarke, J. S. Irwin and J. M. Godowitch, 1983a:  Relevance of mixed layer scaling for daytime dispersion based on RAPS and other field programs. Atm Env., 17(4):854871.

Ching, J.K.S., J.F. Clarke and J. M. Godowitch, 1983b: Modulation of heat flux by different scales of advection in an urban environment. Boundary Layer Meteorol., 25:171191.