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Wei Min M. Hao

Research Chemist

5775 Highway 10 West
Missoula, MT 59808
Contact Wei Min M. Hao

Current Research

My current research projects extend on past accomplishments, one of which was developing the spatial (1 km x 1 km) distribution of daily emissions of atmospheric pollutants and greenhouse gases from fires in North America and Northern Eurasia from 2002 to 2014. My research also involves comparing the fire emission sources with the industrial sources for greenhouse gases and air pollutants seasonally and annually in different regions of North America. I also developed the air quality forecasting model, WRF-Smoke Dispersion Model, to quantify the atmospheric pollutant concentrations downwind from large fires. My work also involves studying the smoke plume dynamics and the optical properties of smoke particles using the most advanced scanning lidar.

Research Interests

Atmospheric chemistry, climate change, air pollution, fire and associated trace gas and aerosol emissions, Interaction of climate-landscape-fire-emissions

Past Research

I conducted research on emissions of atmospheric pollutants and greenhouse gases from fossil combustion and tropical soil.

Why This Research is Important

The research is critical in understanding the impacts of fires on climate, air quality, and public health.


  • Fu Jen Catholic University, Taiwan, B.S., Chemistry, 1976
  • Massachusetts Institute of Technology, M.S., Geochemistry, 1981
  • Massachusetts Institute of Technology, M.S., Toxicology, 1981
  • Harvard University, Cambridge, MA, Ph.D., Atmospheric chemistry, 1986
  • Featured Publications


    Baker, Kirk R.; Lee, Sang Don; Lemieux, Paul; Hudson, Scott; Murphy, Benjamin N.; Bash, Jesse O.; Koplitz, Shannon N.; Nguyen, Thien Khoi V; Hao, Wei Min M.; Baker, Stephen; Lincoln, Emily N., 2021. Predicting wildfire particulate matter and hypothetical re-emission of radiological Cs-137 contamination incidents
    Hao, Wei Min M.; Reeves, Matt C.; Baggett, Scott; Balkanski, Yves; Ciais, Philippe; Nordgren, Bryce L.; Petkov, Alexander; Corley, Rachel E.; Mouillot, Florent; Urbanski, Shawn P.; Yue, Chao, 2021. Wetter environment and increased grazing reduced the area burned in northern Eurasia from 2002 to 2016
    Shetty, Nishit J.; Pandey, Apoorva; Baker, Stephen; Hao, Wei Min M.; Chakrabarty, Rajan K., 2019. Measuring light absorption by freshly emitted organic aerosols: Optical artifacts in traditional solvent-extraction-based methods
    Urbanski, Shawn P.; Nordgren, Bryce L.; Albury, Carl; Schwert, Brenna; Peterson, David; Quayle, Brad; Hao, Wei Min M., 2018. A VIIRS direct broadcast algorithm for rapid response mapping of wildfire burned area in the western United States
    Weise, David R.; Fletcher, Thomas H.; Johnson, Timothy J.; Hao, Wei Min M.; Dietenberger, Mark; Princevac, Marko; Butler, Bret W.; McAllister, Sara S.; O’Brien, Joseph; Loudermilk, Louise; Ottmar, Roger; Hudak, Andrew T.; Kato, Akira; Shotorban, Babak; Mahalingam, Shankar; Mell, William E., 2018. A project to measure and model pyrolysis to improve prediction of prescribed fire behavior
    Hao, Wei Min M.; Baker, Stephen; Lincoln, Emily N.; Hudson, Scott; Lee, Sang Don; Lemieux, Paul, 2018. Cesium emissions from laboratory fires
    Urbanski, Shawn P.; Reeves, Matt C.; Corley, Rachel E.; Silverstein, Robin P.; Hao, Wei Min M., 2018. Contiguous United States wildland fire emission estimates during 2003-2015
    Weise, David R.; Johnson, Timothy J.; Hao, Wei Min M.; Princevac, Marko; Scharko, Nicole; Oeck, Ashley; Myers, Tanya L.; Baker, Stephen P.; Lincoln, Emily N.; Aminfar, AmirHessam, 2018. Measurement of pyrolysis products from mixed fuel beds during fires in a wind tunnel
    Evans, Meredydd; Kholod, Nazar; Kuklinski, Teresa; Denysenko, Artur; Smith, Steven J.; Staniszewski, Aaron; Hao, Wei Min M.; Liu, Liang; Bond, Tami C., 2017. Black carbon emissions in Russia: A critical review
    Hao, Wei Min M.; Petkov, Alexander; Nordgren, Bryce L.; Corley, Rachel E.; Silverstein, Robin P.; Urbanski, Shawn P.; Evangeliou, Nikolaos; Balkanski, Yves; Kinder, Bradley L., 2016. Daily black carbon emissions from fires in northern Eurasia for 2002-2015
    Cheng, Yuan; Engling, Guenter; Moosmuller, Hans; Arnott, W. Patrick; Chen, Antony L. W.; Wold, Cyle E.; Hao, Wei Min M.; He, Ke-Bin, 2016. Light absorption by biomass burning source emissions
    Evangeliou, N.; Balkanski, Y.; Hao, Wei Min M.; Petkov, A.; Silverstein, R. P.; Corley, R.; Nordgren, B. L.; Urbanski, Shawn P.; Eckhardt, S.; Stohl, A.; Tunved, P.; Crepinsek, S.; Jefferson, A.; Sharma, S.; Nojgaard, J. K.; Skov, H., 2016. Wildfires in northern Eurasia affect the budget of black carbon in the Arctic - a 12-year retrospective synopsis (2002-2013)
    Kovalev, Vladimir; Petkov, Alex; Wold, Cyle E.; Urbanski, Shawn P.; Hao, Wei Min M., 2015. Determination of the smoke-plume heights and their dynamics with ground-based scanning LIDAR
    Evangeliou, N.; Balkanski, Y.; Cozic, A.; Hao, Wei Min M.; Mouillot, F.; Thonicke, K.; Paugam, R.; Zibtsev, S.; Mousseau, T. A.; Wang, R.; Poulter, B.; Petkov, A.; Yue, C.; Cadule, P.; Koffi, B.; Kaiser, J. W.; Moller, A. P., 2015. Fire evolution in the radioactive forests of Ukraine and Belarus: future risks for the population and the environment
    Weise, David R.; Miller, Wayne; Cocker, David R. III; Jung, Heejung; Hosseini, Seyedehsan; Princevac, Marko; Yokelson, Robert J.; Burling, Ian; Akagi, Sheryl; Urbanski, Shawn P.; Hao, Wei Min M., 2015. Recent emissions research in southwestern shrub and grassland fuels
    Yue, C.; Ciais, P.; Cadule, P.; Thonicke, K.; Archibald, S.; Poulter, B.; Hao, Wei Min M.; Hantson, S.; Mouillot, F.; Friedlingstein, P.; Maignan, F.; Viovy, N., 2014. Modelling the role of fires in the terrestrial carbon balance by incorporating SPITFIRE into the global vegetation modelORCHIDEE - Part 1: Simulating historical global burned area and fire regimes
    Mao, Y. H.; Li, Q. B.; Chen, D.; Zhang, L.; Hao, Wei Min M.; Liou, K.-N., 2014. Top-down estimates of biomass burning emissions of black carbon in the western United States
    Evangeliou, Nikolaos; Balkanski, Yves; Cozic, Anne; Hao, Wei Min M.; Moller, Anders Pape, 2014. Wildfires in Chernobyl-contaiminated forests and risks to the population and the environment: A new nuclear disaster about to happen?
    Miller, W.; Weise, D.; Mahalingam, S.; Princevac, M.; Yokelson, R.; Hao, Wei Min M.; Cocker, D.; Jung, H.; Tonnesen, G.; Urbanski, Shawn P.; Burling, I.; Hosseini, S.; Akagi, S., 2013. Final report for SERDP project RC-1648: new tools for estimating and managing local/regional air quality impacts of prescribed burns. University of California - Riverside
    Kovalev, Vladimir; Wold, Cyle; Petkov, Alexander; Hao, Wei Min M., 2012. Direct multiangle solution for poorly stratified atmospheres
    Wold, Cyle E.; Kovalev, V. A.; Petkov, Alex; Hao, Wei Min M., 2012. Profiling of poorly stratified atmospheres with scanning lidar
    Kovalev, Vladimir; Wold, Cyle; Petkov, Alexander; Hao, Wei Min M., 2012. Profiling of poorly stratified smoky atmospheres with scanning lidar
    Wang, Yuesi; Xin, Jinyuan; Li, Zhanqing; Wang, Shigong; Wang, Pucai; Hao, Wei Min M.; Nordgren, Bryce L.; Chen, Hongbin; Wang, Lili; Sun, Yang, 2012. Seasonal variations in aerosol optical properties over China
    Hennigan, C. J.; Miracolo, M. A.; Engelhart, G. J.; May, A. A.; Presto, A. A.; Lee, T.; Sullivan, A. P.; McMeeking, G. R.; Coe, H.; Wold, Cyle E.; Hao, Wei Min M.; Gilman, J. B.; Kuster, W. C.; de Gouw, J.; Schichtel, B. A.; Collett, J. L. Jr.; Kreidenweis, S. M.; Robinson, A. L., 2011. Chemical and physical transformations of organic aerosol from the photo-oxidation of open biomass burning emissions in an environmental chamber
    Kovalev, Vladimir; Petkov, A.; Wold, Cyle E.; Urbanski, Shawn P.; Hao, Wei Min M., 2011. Essentials of multiangle data-processing methodology for smoke polluted atmospheres
    Kovalev, Vladimir A.; Petkov, Alexander; Wold, Cyle; Hao, Wei Min M., 2011. Lidar monitoring of regions of intense backscatter with poorly defined boundaries
    Kovalev, Vladimir; Wold, Cyle; Petkov, Alexander; Hao, Wei Min M., 2011. Modified technique for processing multiangle lidar data measured in clear and moderately polluted atmospheres
    Lincoln, E.; Hao, Wei Min M.; Baker, S.; Yokelson, R. J.; Burling, I. R.; Urbanski, Shawn P.; Miller, W.; Weise, D. R.; Johnson, T. J., 2010. A prescribed fire emission factors database for land management and air quality applications
    Chakrabarty, R. K.; Moosmuller, H.; Chen, L.-W. A.; Lewis, K.; Arnott, W. P.; Mazzoleni, C.; Dubey, M. K.; Wold, C. E.; Hao, Wei Min M.; Kreidenweis, S. M., 2010. Brown carbon in tar balls from smoldering biomass combustion
    Sukhinin, A. I.; McRae, D. J.; Stocks, B. J.; Conard, S. G.; Hao, Wei Min M.; Soja, A. J.; Cahoon, D., 2010. Catastrophic fires in Russian forests
    Lee, Taehyoung; Sullivan, Amy P.; Mack, Laura; Jimenez, Jose L.; Kreidenweis, Sonia M.; Onasch, Timothy B.; Worsnop, Douglas R.; Malm, William; Wold, Cyle E.; Hao, Wei Min M.; Collett, Jeffrey L. Jr., 2010. Chemical smoke marker emissions during flaming and smoldering phases of laboratory open burning of wildland fuels
    Li, Zhanqing; Lee, Kwon-Ho; Wang, Yuesi; Xin, Jinyuan; Hao, Wei Min M., 2010. First observation-based estimates of cloud-free aerosol radiative forcing across China
    Burling, I. R.; Yokelson, R. J.; Akagi, S. K.; Johnson, T. J.; Griffith, D. W.; Urbanski, Shawn P.; Taylor, J. W.; Craven, J. S.; McMeeking, G. R.; Roberts, J. M.; Warneke, C.; Veres, P. R.; de Gouw, J. A.; Gilman, J. B.; Kuster, W. C.; Hao, Wei Min M.; Weise, D.; Coe, H.; Seinfeld, J., 2010. First results from a large, multi-platform study of trace gas and particle emissions from biomass burning
    Urbanski, Shawn P.; Kovalev, V.; Hao, Wei Min M.; Wold, Cyle E.; Petkov, Alex, 2010. Lidar and airborne investigation of smoke plume characteristics: Kootenai Creek Fire case study
    Mack, L. A.; Levin, E. J. T.; Kreidenweis, S. M.; Obrist, D.; Moosmuller, H.; Lewis, K. A.; Arnott, W. P.; McMeeking, G. R.; Sullivan, A. P.; Wold, Cyle E.; Hao, Wei Min M.; Collett, J. L. Jr.; Malm, W. C., 2010. Optical closure experiments for biomass smoke aerosols
    Kreidenweis, S. M.; Collett, J. L.; Moosmuller, H.; Arnott, W. P.; Hao, Wei Min M.; Malm, W. C., 2010. Overview of the Fire Lab at Missoula Experiments (FLAME)
    Hennigan, C. J.; Miracolo, M. A.; Engelhart, G. J.; May, A. A.; Wold, Cyle E.; Hao, Wei Min M.; Lee, T.; Sullivan, A. P.; Gilman, J. B.; Kuster, W. C.; de Gouw, J. A.; Collett, J. L.; Kreidenweis, S. M.; Robinson, A. L., 2010. Oxidative aging and secondary organic aerosol formation from simulated wildfire emissions
    Lee, T.; Kreidenweis, S. M.; Collett, J. L.; Sullivan, A. P.; Carrico, C. M.; Jimenez, J. L.; Cubison, M.; Saarikoski, S.; Worsnop, D. R.; Onasch, T. B.; Fortner, E.; Malm, W. C.; Lincoln, E.; Wold, Cyle E.; Hao, Wei Min M., 2010. Preliminary observations of organic gas-particle partitioning from biomass combustion smoke using an aerosol mass spectrometer
    Liu, J.; Xia, X.; Li, Z.; Wang, P.; Min, M.; Hao, Wei Min M.; Wang, Y.; Xin, J.; Li, X.; Zheng, Y.; Chen, Z., 2010. Validation of multi-angle imaging spectroradiometer aerosol products in China
    Wold, Cyle E.; Urbanski, Shawn P.; Kovalev, Vladimir; Petkov, Alexander; Hao, Wei Min M., 2010. Validation of smoke plume rise models using ground based lidar
    Urbanski, Shawn P.; Salmon, J. M.; Nordgren, B. L.; Hao, Wei Min M., 2009. A MODIS direct broadcast algorithm for mapping wildfire burned area in the western United States
    Kovalev, Vladimir A.; Wold, Cyle E.; Petkov, Alex; Hao, Wei Min M., 2009. Alternative method for determining the constant offset in lidar signal
    Urbanski, Shawn P.; Hao, Wei Min M.; Baker, Stephen, 2009. Chemical composition of wildland fire emissions
    Sullivan, A. P.; Holden, A. S.; Patterson, L. A.; McMeeking, G. R.; Kreidenweis, S. M.; Malm, W. C.; Hao, Wei Min M.; Wold, C. E.; Collett, J. L. Jr., 2008. A method for smoke marker measurements and its potential application for determining the contribution of biomass burning from wildfires and prescribed fires to ambient PM2.5 organic carbon
    Wold, Cyle E.; Kovalev, Vladimir; Hao, Wei Min M., 2008. Backscatter nephelometer to calibrate scanning lidar
    Pu, Ruiliang; Li, Zhanqing; Gong, Peng; Csiszar, Ivan; Fraser, Robert; Hao, Wei Min M.; Kondragunta, Shobha; Weng, Fuzhong, 2007. Development and analysis of a 12-year daily 1-km forest fire dataset across North America from NOAA/AVHRR
    McRae, D. J.; ; Ivanova, G. A.; Sukhinin, A. I.; Baker, Stephen P.; Samsonov, Y. N.; Blake, T. W.; Ivanov, V. A.; Ivanov, A. V.; Churkina, T. V.; Hao, Wei Min M.; Koutzenogij, K. P.; Kovaleva, Nataly, 2006. Variability of fire behavior, fire effects, and emissions in Scotch pine forests of central Siberia
    A map showing trends in the area burned across northern Eurasia. Kazakhstan shows a concentrated decline in area burned.
    Grassland fires dominated the declining trend of burned areas in northern Eurasia, accounting for 93 % of the decline of the total area burned. Grassland fires in Kazakhstan contributed 47 % of the total area burned and 84% of the decline. Wetter climate and increased grazing are the principle driving forces for the decline. 
    Chita forest April 2015
    Scientists examined daily black carbon emissions from fires over different land cover types in Northern Eurasia. Their results are critical in understanding the future impacts of climate change on the fire dynamics in Northern Eurasia and the contribution of black carbon to accelerated melting of Arctic ice.
    Wildfire smoke can trigger severe pollution episodes with substantial impacts on public health.
    Global surface temperatures have increased about 0.89°C during the period from 1901 to 2012. Northern Eurasia has experienced the greatest temperature increase to date and is projected to continue experiencing the largest temperature increase globally. High-latitude boreal and temperate ecosystems are particularly sensitive to climate change, and fire – a major disturbance in these ecosystems – responds rapidly to climate change.
    Experiments to Improve Agricultural Smoke Decision Support Tools

    RMRS Science Program Areas: 
    Fire, Fuel and Smoke