Daniel Tong is a research professor at Center for Spatial Science and Systems, a research unit affiliated with the College of Science at George Mason University. He is interested in improvements to the National Air Quality Forecast Capability (NAQFC).

The goal of Daniel’s HAQAST project is to use satellite observations to improve emission estimates and air quality forecasting/reanalysis.  Our team aims to substantially enhance the nation’s pollution forecasting capability through:

  1. Developing emission data assimilation capability for timely and reliable updates of emission inventories using satellite observations.
  2. Extending this capability and the AQAST chemical reanalysis system to improve air quality reanalysis products and services.
  3. Improving ozone and PM2.5 forecasts to support decision makers locally and globally to mitigate health effects of air pollution.

In addition, he contributes to the following Tiger Teams:

And he co-leads the Tiger Team Improved National Emissions Inventory NOx Emissions Using OMI Tropospheric NO2 Retrievals and Potential Impacts on Air Quality Strategy Development along with Brad Pierce.


HAQAST Presentations

Air Quality Forecasting

Challenges in Air Quality Services

Improved National Emissions Inventory NOx emissions using OMI tropospheric NO2 retrievals and potential impacts on air quality strategy development

Emission Data Assimilation for Air Quality Forecasting

Observing and Forecasting Dust Storms



Spatial Particulate Fields during High Winds in the Imperial Valley, California

Frank R. Freedman, Paul English, Jeff Wagner, Yang Liu, Akula Venkatram, Daniel Q. Tong, Mohammad Z. Al-Hamdan, Meytar Sorek-Hamer, Robert Chatfield, Ana Rivera and Patrick L. Kinney



Advancing Air Quality Forecasting to Protect Human Health

Daniel Tong, Youhua Tang, EM.



Ammonia Emissions from Biomass Burning in the Continental United States



Tracking Dust Storms Using the Latest Satellite Technology: The Rapid Refresh GOES-16 Advanced Baseline Imager

Kondragunta, S., Zhang, H., Ciren, P., Laszlo, I., and Tong, DThe Magazine for Environmental Managers



Improving NOAA NAQFC PM2.5 Predictions with a Bias Correction Approach

Huang, J., McQueen, J., Wilczak, J., Djalalova, I., Stajner, I., Shafran, P., Allured, D., Lee, P., Pan, L., Tong, D. and Huang, H.C., Weather and Forecasting



Intensified dust storm activity and Valley fever infection in the southwestern United States

Daniel Q. Tong, Julian X. L. Wang, Thomas E. Gill, Hang Lei and Binyu Wang, Geophysical Research Letters 



Impact of Moderate Resolution Imaging Spectroradiometer Aerosol Optical Depth and AirNow PM2.5 assimilation on Community Multi‐scale Air Quality aerosol predictions over the contiguous United States

Tianfeng Chai, Hyun‐Cheol Kim, Li Pan, Pius Lee, Daniel Tong, Journal of Geophysical Research: Atmospheres



A case study of aerosol data assimilation with the Community Multi-scale Air Quality Model over the contiguous United States using 3D-Var and optimal interpolation methods

Youhua Tang, Mariusz Pagowski, Tianfeng Chai, Li Pan, Pius Lee, Daniel Tong, et al., Journal of Geoscientific Model Development



Evaluating ammonia (NH3) Predictions in the NOAA National Air Quality Forecast Capability (NAQFC) Using In-situ Aircraft and Satellite Measurements from the CalNex2010 Campaign



NAQFC Developmental Forecast Guidance for Fine Particulate Matter (PM2.5)

Pius LeeJeffery McQueenIvanka StajnerJianping HuangLi PanDaniel TongHyuncheol KimYouhua TangShobha KondraguntaMark RuminskiSarah LuEric RogersRick SaylorPerry ShafranHo-Chun HuangJerry GorlineSikchya Upadhayay, and Richard Artz, AMS: Weather and Forecasting



Impact of the 2008 Global Recession on air quality over the United States: Implications for surface ozone levels from changes in NOx emissions

Daniel Tong, Li Pan, Weiwei Chen, Lok Lamsal, Pius Lee, Youhua Tang, Hyuncheol Kim, Shobha Kondragunta, Ivanka Stajner, Geophysical Research Letters


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