Brad Weir

Brad Weir

  • SCIENTIST
  • 301.614.6033
  • NASA/GSFC
  • Mail Code: 610.1
  • Greenbelt , MD 20771
  • Employer: MORGAN STATE UNIV.
  • Brief Bio

    Dr. Brad Weir is a research scientist at NASA Goddard Space Flight Center and Morgan State University through the GESTAR II cooperative agreement. He is the lead developer of NASA's Goddard Earth Observing System (GEOS) Constituent Data Assimilation System (CoDAS) — a state-of-the-art statistical method for estimating atmospheric trace gas abundances based on satellite observations. His research focuses on developing and applying mathematical and statistical methods to address questions about the physics, chemistry, and biology of the Earth's atmosphere, ocean, and land surface. His work has appeared in Science, the New York Times, the websites of National Geographic and the BBC, the NASA COVID-19 Dashboard, and the NASA/ESA/JAXA trilateral Earth Observing Dashboard.

    Positions/Employment

    10/2013 - Present

    Scientist (Senior Scientist, 2021-Present)

    NASA Goddard Space Flight Center, Global Modeling and Assimilation Office, Greenbelt, MD
    Goddard Earth Sciences Technology and Research (GESTAR) I & II cooperative agreements:
    • Universities Space Research Association (2013-2021)
    • Morgan State University (2021-Present)
    9/2010 - 10/2013

    Post-doctoral Research Associate

    Oregon State University, College of Earth, Atmosphere, and Oceanic Sciences, Corvallis, OR

    Education

    • Ph.D., Mathematics, University of Arizona (2010)
    • B.A., Cum Laude, Mathematics, New York University (2003)

    Publications

    Refereed

    Sweeney, C., A. Chatterjee, S. Wolter, et al. K. McKain, R. Bogue, S. Conley, T. Newberger, L. Hu, L. Ott, B. Poulter, L. Schiferl, B. Weir, Z. Zhang, and C. E. Miller. 2022. "Using atmospheric trace gas vertical profiles to evaluate model fluxes: a case study of Arctic-CAP observations and GEOS simulations for the ABoVE domain." Atmospheric Chemistry and Physics, 22 (9): 6347-6364 [10.5194/acp-22-6347-2022]

    Schuh, A. E., B. Byrne, A. R. Jacobson, et al. S. M. Crowell, F. Deng, D. F. Baker, M. S. Johnson, S. Philip, and B. Weir. 2022. "On the role of atmospheric model transport uncertainty in estimating the Chinese land carbon sink." Nature, [10.1038/s41586-021-04258-9]

    Peiro, H., S. Crowell, A. Schuh, et al. D. F. Baker, C. O'Dell, A. R. Jacobson, F. Chevallier, J. Liu, A. Eldering, D. Crisp, F. Deng, B. Weir, S. Basu, M. S. Johnson, S. Philip, and I. Baker. 2022. "Four years of global carbon cycle observed from the Orbiting Carbon Observatory 2 (OCO-2) version 9 and in situ data and comparison to OCO-2 version 7." Atmospheric Chemistry and Physics, 22 (2): 1097-1130 [10.5194/acp-22-1097-2022]

    Zhang, L., K. J. Davis, A. E. Schuh, et al. A. R. Jacobson, S. Pal, Y. Y. Cui, D. Baker, S. Crowell, F. Chevallier, M. Remaud, J. Liu, B. Weir, S. Philip, M. S. Johnson, F. Deng, and S. Basu. 2022. "Multi‐Season Evaluation of CO2 Weather in OCO‐2 MIP Models." Journal of Geophysical Research: Atmospheres, 127 (2): [10.1029/2021jd035457]

    Weir, B., D. Crisp, C. W. O’Dell, et al. S. Basu, A. Chatterjee, J. Kolassa, T. Oda, S. Pawson, B. Poulter, Z. Zhang, P. Ciais, S. J. Davis, Z. Liu, and L. E. Ott. 2021. "Regional impacts of COVID-19 on carbon dioxide detected worldwide from space." Science Advances, 7 (45): [10.1126/sciadv.abf9415]

    Davis, K. J., E. V. Browell, S. Feng, et al. T. Lauvaux, M. D. Obland, S. Pal, B. C. Baier, D. F. Baker, I. T. Baker, Z. R. Barkley, K. W. Bowman, Y. Y. Cui, A. S. Denning, J. P. DiGangi, J. T. Dobler, A. Fried, T. Gerken, K. Keller, B. Lin, A. R. Nehrir, C. P. Normile, C. W. O’Dell, L. E. Ott, A. Roiger, A. E. Schuh, C. Sweeney, Y. Wei, B. Weir, M. Xue, and C. A. Williams. 2021. "The Atmospheric Carbon and Transport (ACT)-America Mission." Bulletin of the American Meteorological Society, 102 (9): E1714-E1734 [10.1175/bams-d-20-0300.1]

    Weir, B., L. E. Ott, G. J. Collatz, et al. S. R. Kawa, B. Poulter, A. Chatterjee, T. Oda, and S. Pawson. 2021. "Bias-correcting carbon fluxes derived from land-surface satellite data for retrospective and near-real-time assimilation systems." Atmospheric Chemistry and Physics, 21: 9609–9628 [10.5194/acp-21-9609-2021]

    Campbell, J. F., B. Lin, J. Dobler, et al. S. Pal, K. Davis, M. D. Obland, W. Erxleben, D. McGregor, C. O’Dell, E. Bell, B. Weir, T. Fan, S. Kooi, I. Gordon, A. Corbett, and R. Kochanov. 2020. "Field Evaluation of Column CO2 Retrievals from Intensity‐Modulated Continuous‐Wave Differential Absorption Lidar Measurements during the ACT‐America Campaign." Earth and Space Science, (e2019EA000847): [10.1029/2019ea000847]

    Wargan, K., B. Weir, G. L. Manney, S. E. Cohn, and N. J. Livesey. 2020. "The Anomalous 2019 Antarctic Ozone Hole in the GEOS Constituent Data Assimilation System With MLS Observations." Journal of Geophysical Research: Atmospheres, 125 (18): [10.1029/2020jd033335]

    Lee, E., F. Zeng, R. D. Koster, et al. L. E. Ott, S. P. Mahanama, B. Weir, B. Poulter, and T. Oda. 2020. "Impact of a Regional US Drought on Land and Atmospheric Carbon." Journal of Geophysical Research: Biogeosciences, 125 (8): [10.1029/2019jg005599]

    Bell, E., C. W. O'Dell, K. J. Davis, et al. J. Campbell, E. Browell, A. Scott Denning, J. Dobler, W. Erxleben, T. Fan, S. Kooi, B. Lin, S. Pal, and B. Weir. 2020. "Evaluation of OCO‐2 XCO2 Variability at Local and Synoptic Scales using Lidar and In Situ Observations from the ACT‐America Campaigns." Journal of Geophysical Research: Atmospheres, 125 (10): [10.1029/2019jd031400]

    Wargan, K., N. Kramarova, B. Weir, S. Pawson, and S. M. Davis. 2020. "Toward a Reanalysis of Stratospheric Ozone for Trend Studies: Assimilation of the Aura Microwave Limb Sounder and Ozone Mapping and Profiler Suite Limb Profiler Data." Journal of Geophysical Research: Atmospheres, 125 (4): [10.1029/2019jd031892]

    Schuh, A. E., A. R. Jacobson, S. Basu, et al. B. Weir, D. Baker, K. Bowman, F. Chevallier, S. Crowell, K. J. Davis, F. Deng, S. Denning, L. Feng, D. Jones, J. Liu, and P. I. Palmer. 2019. "Quantifying the Impact of Atmospheric Transport Uncertainty on CO2 Surface Flux Estimates." Global Biogeochemical Cycles, 33: 484-500 [10.1029/2018gb006086]

    Lee, E., F. Zeng, R. D. Koster, et al. B. Weir, L. E. Ott, and B. Poulter. 2018. "The impact of spatiotemporal variability in atmospheric CO2 concentration on global terrestrial carbon fluxes." Biogeosciences, 15: 5635-5652 [10.5194/bg-15-5635-2018]

    Eldering, A., P. O. Wennberg, D. Crisp, et al. D. S. Schimel, M. R. Gunson, A. Chatterjee, J. Liu, F. M. Schwandner, Y. Sun, C. W. O’Dell, C. Frankenberg, T. Taylor, B. Fisher, G. B. Osterman, D. Wunch, J. Hakkarainen, J. Tamminen, and B. Weir. 2017. "The Orbiting Carbon Observatory-2 early science investigations of regional carbon dioxide fluxes." Science, 358 (6360): eaam5745 [10.1126/science.aam5745]

    Weir, B., R. N. Miller, and Y. H. Spitz. 2013. "A potential implicit particle method for high-dimensional systems." Nonlinear Processes in Geophysics, 20: 1047-1060 [10.5194/npg-20-1047-2013]

    Weir, B., R. N. Miller, and Y. H. Spitz. 2013. "Implicit Estimation of Ecological Model Parameters." Bulletin of Mathematical Biology, 75 (2): 223-257 [10.1007/s11538-012-9801-6]

    Weir, B., Y. Uchiyama, E. M. Lane, J. M. Restrepo, and J. C. McWilliams. 2011. "A vortex force analysis of the interaction of rip currents and surface gravity waves." Journal of Geophysical Research: Oceans, 116 (C5): C05001 [10.1029/2010jc006232]

    Non-Refereed

    Kuze, A., Y. Ikehata, N. Kikuchi, et al. F. Kataoka, K. Shiomi, K. Jucks, D. Crisp, B. Weir, and L. Ott. 2021. "Covid-19 Impact Monitoring for Climate Environment (Greenhouse Gases)." 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS [10.1109/igarss47720.2021.9554328]

    Talks, Presentations and Posters

    Invited

    Data assimilation for carbon monitoring

    5 / 11 / 2022

    WMO GHG/Carbon Monitoring Workshop

    World Meteorological Organization, Geneva, Switzerland

    The Orbiting Carbon Observatory-2 project: Monitoring atmospheric carbon dioxide

    3 / 22 / 2022

    Carbon Tracking and Reporting

    Energy Conference Network, Houston, TX, USA

    The GEOS-Carb reanalysis of atmospheric carbon dioxide

    4 / 5 / 2017

    GMAO Seminar Series on Earth System Sceince

    Global Modeling and Assimilation Office, Greenbelt, MD, USA

    Implicit parameter estimation

    2 / 17 / 2013

    Probabilistic Approaches to Data Assimilation for Earth Systems

    Banff International Research Station, Banff, Alberta, Canada

    Implicit sampling: theory and implementation

    2 / 7 / 2013

    International Workshop on Particle Filters for Data Assimilation

    Institute for Statistical Mathematics, Tachikawa, Tokyo, Japan

    Implicit assimilation for marine ecological models

    12 / 3 / 2012

    AGU Fall Meeting 2012, San Francisco, CA, USA

    Abstract Id. NG41D-02

    Brief Bio

    Dr. Brad Weir is a research scientist at NASA Goddard Space Flight Center and Morgan State University through the GESTAR II cooperative agreement. He is the lead developer of NASA's Goddard Earth Observing System (GEOS) Constituent Data Assimilation System (CoDAS) — a state-of-the-art statistical method for estimating atmospheric trace gas abundances based on satellite observations. His research focuses on developing and applying mathematical and statistical methods to address questions about the physics, chemistry, and biology of the Earth's atmosphere, ocean, and land surface. His work has appeared in Science, the New York Times, the websites of National Geographic and the BBC, the NASA COVID-19 Dashboard, and the NASA/ESA/JAXA trilateral Earth Observing Dashboard.

    Publications

    Refereed

    Sweeney, C., A. Chatterjee, S. Wolter, et al. K. McKain, R. Bogue, S. Conley, T. Newberger, L. Hu, L. Ott, B. Poulter, L. Schiferl, B. Weir, Z. Zhang, and C. E. Miller. 2022. "Using atmospheric trace gas vertical profiles to evaluate model fluxes: a case study of Arctic-CAP observations and GEOS simulations for the ABoVE domain." Atmospheric Chemistry and Physics 22 (9): 6347-6364 [10.5194/acp-22-6347-2022]

    Schuh, A. E., B. Byrne, A. R. Jacobson, et al. S. M. Crowell, F. Deng, D. F. Baker, M. S. Johnson, S. Philip, and B. Weir. 2022. "On the role of atmospheric model transport uncertainty in estimating the Chinese land carbon sink." Nature [10.1038/s41586-021-04258-9]

    Peiro, H., S. Crowell, A. Schuh, et al. D. F. Baker, C. O'Dell, A. R. Jacobson, F. Chevallier, J. Liu, A. Eldering, D. Crisp, F. Deng, B. Weir, S. Basu, M. S. Johnson, S. Philip, and I. Baker. 2022. "Four years of global carbon cycle observed from the Orbiting Carbon Observatory 2 (OCO-2) version 9 and in situ data and comparison to OCO-2 version 7." Atmospheric Chemistry and Physics 22 (2): 1097-1130 [10.5194/acp-22-1097-2022]

    Zhang, L., K. J. Davis, A. E. Schuh, et al. A. R. Jacobson, S. Pal, Y. Y. Cui, D. Baker, S. Crowell, F. Chevallier, M. Remaud, J. Liu, B. Weir, S. Philip, M. S. Johnson, F. Deng, and S. Basu. 2022. "Multi‐Season Evaluation of CO2 Weather in OCO‐2 MIP Models." Journal of Geophysical Research: Atmospheres 127 (2): [10.1029/2021jd035457]

    Weir, B., D. Crisp, C. W. O’Dell, et al. S. Basu, A. Chatterjee, J. Kolassa, T. Oda, S. Pawson, B. Poulter, Z. Zhang, P. Ciais, S. J. Davis, Z. Liu, and L. E. Ott. 2021. "Regional impacts of COVID-19 on carbon dioxide detected worldwide from space." Science Advances 7 (45): [10.1126/sciadv.abf9415]

    Davis, K. J., E. V. Browell, S. Feng, et al. T. Lauvaux, M. D. Obland, S. Pal, B. C. Baier, D. F. Baker, I. T. Baker, Z. R. Barkley, K. W. Bowman, Y. Y. Cui, A. S. Denning, J. P. DiGangi, J. T. Dobler, A. Fried, T. Gerken, K. Keller, B. Lin, A. R. Nehrir, C. P. Normile, C. W. O’Dell, L. E. Ott, A. Roiger, A. E. Schuh, C. Sweeney, Y. Wei, B. Weir, M. Xue, and C. A. Williams. 2021. "The Atmospheric Carbon and Transport (ACT)-America Mission." Bulletin of the American Meteorological Society 102 (9): E1714-E1734 [10.1175/bams-d-20-0300.1]

    Weir, B., L. E. Ott, G. J. Collatz, et al. S. R. Kawa, B. Poulter, A. Chatterjee, T. Oda, and S. Pawson. 2021. "Bias-correcting carbon fluxes derived from land-surface satellite data for retrospective and near-real-time assimilation systems." Atmospheric Chemistry and Physics 21 9609–9628 [10.5194/acp-21-9609-2021]

    Campbell, J. F., B. Lin, J. Dobler, et al. S. Pal, K. Davis, M. D. Obland, W. Erxleben, D. McGregor, C. O’Dell, E. Bell, B. Weir, T. Fan, S. Kooi, I. Gordon, A. Corbett, and R. Kochanov. 2020. "Field Evaluation of Column CO2 Retrievals from Intensity‐Modulated Continuous‐Wave Differential Absorption Lidar Measurements during the ACT‐America Campaign." Earth and Space Science [10.1029/2019ea000847]

    Wargan, K., B. Weir, G. L. Manney, S. E. Cohn, and N. J. Livesey. 2020. "The Anomalous 2019 Antarctic Ozone Hole in the GEOS Constituent Data Assimilation System With MLS Observations." Journal of Geophysical Research: Atmospheres 125 (18): [10.1029/2020jd033335]

    Lee, E., F. Zeng, R. D. Koster, et al. L. E. Ott, S. P. Mahanama, B. Weir, B. Poulter, and T. Oda. 2020. "Impact of a Regional US Drought on Land and Atmospheric Carbon." Journal of Geophysical Research: Biogeosciences 125 (8): [10.1029/2019jg005599]

    Bell, E., C. W. O'Dell, K. J. Davis, et al. J. Campbell, E. Browell, A. Scott Denning, J. Dobler, W. Erxleben, T. Fan, S. Kooi, B. Lin, S. Pal, and B. Weir. 2020. "Evaluation of OCO‐2 XCO2 Variability at Local and Synoptic Scales using Lidar and In Situ Observations from the ACT‐America Campaigns." Journal of Geophysical Research: Atmospheres 125 (10): [10.1029/2019jd031400]

    Wargan, K., N. Kramarova, B. Weir, S. Pawson, and S. M. Davis. 2020. "Toward a Reanalysis of Stratospheric Ozone for Trend Studies: Assimilation of the Aura Microwave Limb Sounder and Ozone Mapping and Profiler Suite Limb Profiler Data." Journal of Geophysical Research: Atmospheres 125 (4): [10.1029/2019jd031892]

    Schuh, A. E., A. R. Jacobson, S. Basu, et al. B. Weir, D. Baker, K. Bowman, F. Chevallier, S. Crowell, K. J. Davis, F. Deng, S. Denning, L. Feng, D. Jones, J. Liu, and P. I. Palmer. 2019. "Quantifying the Impact of Atmospheric Transport Uncertainty on CO2 Surface Flux Estimates." Global Biogeochemical Cycles 33 484-500 [10.1029/2018gb006086]

    Lee, E., F. Zeng, R. D. Koster, et al. B. Weir, L. E. Ott, and B. Poulter. 2018. "The impact of spatiotemporal variability in atmospheric CO2 concentration on global terrestrial carbon fluxes." Biogeosciences 15 5635-5652 [10.5194/bg-15-5635-2018]

    Eldering, A., P. O. Wennberg, D. Crisp, et al. D. S. Schimel, M. R. Gunson, A. Chatterjee, J. Liu, F. M. Schwandner, Y. Sun, C. W. O’Dell, C. Frankenberg, T. Taylor, B. Fisher, G. B. Osterman, D. Wunch, J. Hakkarainen, J. Tamminen, and B. Weir. 2017. "The Orbiting Carbon Observatory-2 early science investigations of regional carbon dioxide fluxes." Science 358 (6360): eaam5745 [10.1126/science.aam5745]

    Weir, B., R. N. Miller, and Y. H. Spitz. 2013. "A potential implicit particle method for high-dimensional systems." Nonlinear Processes in Geophysics 20 1047-1060 [10.5194/npg-20-1047-2013]

    Weir, B., R. N. Miller, and Y. H. Spitz. 2013. "Implicit Estimation of Ecological Model Parameters." Bulletin of Mathematical Biology 75 (2): 223-257 [10.1007/s11538-012-9801-6]

    Weir, B., Y. Uchiyama, E. M. Lane, J. M. Restrepo, and J. C. McWilliams. 2011. "A vortex force analysis of the interaction of rip currents and surface gravity waves." Journal of Geophysical Research: Oceans 116 (C5): C05001 [10.1029/2010jc006232]

    Non-Refereed

    Kuze, A., Y. Ikehata, N. Kikuchi, et al. F. Kataoka, K. Shiomi, K. Jucks, D. Crisp, B. Weir, and L. Ott. 2021. "Covid-19 Impact Monitoring for Climate Environment (Greenhouse Gases)." 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS [10.1109/igarss47720.2021.9554328]

                                                                                                                                                                                            
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