K. Emma Knowland

K. Emma Knowland

  • Research Scientist
  • 301.614.6342
  • NASA/GSFC
  • Mail Code: 610.1
  • Greenbelt , MD 20771
  • Employer: UNIVERSITY OF MARYLAND BALTIMORE CO
  • Brief Bio

    Dr. Knowland is a lead scientist in the development of NASA GMAO’s atmospheric composition forecast system, GEOS-CF.  She directs the transition from research & development to the production system and leads the evaluation of stratospheric composition in the GEOS-CF.  Dr. Knowland’s research interests include both chemical and dynamical drivers of stratospheric and tropospheric composition. She is a member of the World Meteorological Organization (WMO) Global Air Quality Forecast and Information System (GAFIS) Steering Committee and Co-lead of Group 2 “Best practices and challenges for Air Quality Forecast Systems”.

    Positions/Employment

    11/2015 - Present

    Research Scientist

    Universities Space Research Association (USRA)/Goddard Earth Sciences Technology and Research (GESTAR), GMAO, Goddard Space Flight Center

    Research responsibilities include the evaluation of trace gas transport in NASA’s GEOS model and data assimilation systems and the associated transport uncertainty in the models related to spatial resolution.  In particular, the development and evaluation of NASA’s air quality forecast, GEOS-CF, and the investigation of stratospheric intrusions of high levels of ozone (O3) transported toward the surface, which can impact surface concentrations and lead to nonattainment of air quality standards.

    Education

    Doctor of Philosophy
    September 2011 – September 2015
    Atmospheric and Environmental Sciences, University of Edinburgh, Edinburgh, UK
    Project title: Linking mid-latitude storms, atmospheric composition and climate variability
    Research: A new approach to the study of long-range transport of air pollution using the Monitoring Atmospheric Chemistry and Climate (MACC) reanalysis dataset with a storm tracking algorithm to investigate the behavior of air pollution within mid-latitude storms over the North Pacific Ocean and North Atlantic Ocean.
    Supervisors: Ruth Doherty (Univ. of Edinburgh) and Kevin I. Hodges (Univ. of Reading)
    Awards: Principal’s Career Development Scholarship and the Edinburgh Global Research Scholarship Award

    Master of Science
    September 2006 – May 2008
    Atmospheric and Oceanic Sciences, McGill University, Montreal, Quebec, Canada
    Thesis: A study of meteorological conditions associated with anomalously early and anomalously late openings of a Northwest Territories winter road
    Supervisors: John R. Gyakum and Charles A. Lin

    Bachelor of Science (Honours)
    September 2002 – May 2006
    Atmospheric and Oceanic Sciences, McGill University, Montreal, Quebec, Canada
     

    Professional Societies

    American Geophysical Union, 2013 - Present

    Professional Service

    2020-present: World Meteorological Organization (WMO) Global Air Quality Forecast and Information System (GAFIS) Steering Committee. Co-lead of Group 2 “Best practices and challenges for Air Quality Forecast Systems” 


    Publications

    Refereed

    Duncan, B. N., C. A. Malings, K. E. Knowland, et al. D. C. Anderson, A. I. Prados, C. A. Keller, K. R. Cromar, S. Pawson, and H. Ensz. 2021. "Augmenting the Standard Operating Procedures of Health and Air Quality Stakeholders With NASA Resources." GeoHealth, 5 (9): [10.1029/2021gh000451]

    Lee, J. D., F. A. Squires, T. Sherwen, et al. S. E. Wilde, S. J. Cliff, L. J. Carpenter, J. R. Hopkins, S. J. Bauguitte, C. Reed, P. Barker, G. Allen, T. J. Bannan, E. Matthews, A. Mehra, C. Percival, D. E. Heard, L. K. Whalley, G. V. Ronnie, S. Seldon, T. Ingham, C. A. Keller, K. E. Knowland, E. G. Nisbet, and S. Andrews. 2021. "Ozone production and precursor emission from wildfires in Africa." Environmental Science: Atmospheres, (Accepted) [10.1039/d1ea00041a]

    Gronoff, G., T. Berkoff, K. Knowland, et al. L. Lei, M. Shook, B. Fabbri, W. Carrion, and A. Langford. 2021. "Case study of stratospheric Intrusion above Hampton, Virginia: lidar-observation and modeling analysis." Atmospheric Environment, 118498 [10.1016/j.atmosenv.2021.118498]

    Malings, C., K. E. Knowland, C. A. Keller, and S. E. Cohn. 2021. "Sub‐City Scale Hourly Air Quality Forecasting by Combining Models, Satellite Observations, and Ground Measurements." Earth and Space Science, 8 (7): [10.1029/2021ea001743]

    Johnson, M. S., K. Strawbridge, K. E. Knowland, C. Keller, and M. Travis. 2021. "Long-range transport of Siberian biomass burning emissions to North America during FIREX-AQ." Atmospheric Environment, 252: 118241 [10.1016/j.atmosenv.2021.118241]

    Keller, C. A., K. E. Knowland, B. N. Duncan, et al. J. Liu, D. C. Anderson, S. Das, R. A. Lucchesi, E. W. Lundgren, J. M. Nicely, E. Nielsen, L. E. Ott, E. Saunders, S. A. Strode, P. A. Wales, D. J. Jacob, and S. Pawson. 2021. "Description of the NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0." Journal of Advances in Modeling Earth Systems, 13 (4): [10.1029/2020ms002413]

    Keller, C. A., M. J. Evans, K. E. Knowland, et al. C. A. Hasenkopf, S. Modekurty, R. A. Lucchesi, T. Oda, B. B. Franca, F. C. Mandarino, M. V. Díaz Suárez, R. G. Ryan, L. H. Fakes, and S. Pawson. 2021. "Global impact of COVID-19 restrictions on the surface concentrations of nitrogen dioxide and ozone." Atmospheric Chemistry and Physics, 21 (5): 3555-3592 [10.5194/acp-21-3555-2021]

    Robinson, J., A. Kotsakis, F. Santos, et al. R. Swap, K. E. Knowland, G. Labow, V. Connors, M. Tzortziou, N. Abuhassan, M. Tiefengraber, and A. Cede. 2020. "Using networked Pandora observations to capture spatiotemporal changes in total column ozone associated with stratosphere-to-troposphere transport." Atmospheric Research, 238: 104872 [10.1016/j.atmosres.2020.104872]

    Dacic, N., J. T. Sullivan, K. E. Knowland, et al. G. M. Wolfe, L. D. Oman, T. A. Berkoff, and G. P. Gronoff. 2019. "Evaluation of NASA's high-resolution global composition simulations: Understanding a pollution event in the Chesapeake Bay during the summer 2017 OWLETS campaign." Atmospheric Environment, 117133 [10.1016/j.atmosenv.2019.117133]

    Wargan, K., C. Orbe, S. Pawson, et al. J. R. Ziemke, L. D. Oman, M. A. Olsen, L. Coy, and K. E. Knowland. 2018. "Recent decline in extratropical lower stratospheric ozone attributed to circulation changes." Geophysical Research Letters, [10.1029/2018gl077406]

    Knowland, K. E., R. M. Doherty, K. I. Hodges, and L. E. Ott. 2017. "The influence of mid-latitude cyclones on European background surface ozone." Atmospheric Chemistry and Physics, 17 (20): 12421-12447 [10.5194/acp-17-12421-2017]

    Knowland, K. E., L. E. Ott, B. N. Duncan, and K. Wargan. 2017. "Stratospheric intrusion-influenced ozone air quality exceedances investigated in the NASA MERRA-2 Reanalysis." Geophysical Research Letters, 44 (10): 691–10,701 [10.1002/2017gl074532]

    Knowland, K. E., R. M. Doherty, and K. I. Hodges. 2015. "The effects of springtime mid-latitude storms on trace gas composition determined from the MACC reanalysis." Atmospheric Chemistry and Physics, 15 (6): 3605--3628 [10.5194/acp-15-3605-2015]

    Knowland, K. E., J. R. Gyakum, and C. A. Lin. 2010. "A study of the meteorological conditions associated with anomalously early and late openings of a Northwest Territories winter road." Arctic, 63 (2): 227--239 [http://dx.doi.org/10.14430/arctic977]

    Non-Refereed

    Knowland, K. E., C. A. Keller, and R. A. Lucchesi. 2020. "File Specification for GEOS-CF Products." GMAO Office Note No. 17 (Version 1.1), 37pp, available from http://gmao.gsfc.nasa.gov/pubs/office_notes

    Talks, Presentations and Posters

    Invited

    NASA's High-Resolution GEOS Forecasting and Reanalysis Products: A unified Tool from Local to Global Scales

    6 / 2021

    NASA Ames Earth Science Division Seminar series

    Near real-time air quality forecasts using the NASA GEOS model

    6 / 2021

    Invited speaker and panelist for the UNEP GEMS-AIR virtual session at the Sustainability Research & Innovation (SRI) Congress 2021

    NASA's High-Resolution GEOS Forecasting and Reanalysis Products: A unified Tool from Local to Global Scales

    5 / 2021

    Atmospheric and Marine Biogeochemistry Seminars at the School of Environmental Sciences, University of East Anglia, Norwich, England (virtual presentation)

    Air Pollution Forecasts using the NASA GEOS model

    3 / 2021

    GISS Lunch Seminar Series

    Near real-time air quality forecasts using the NASA GEOS model

    12 / 2020

    AGU Fall Meeting 2020 (Virtual)

    NASA’s High-Resolution GEOS Forecasting and Reanalysis Products: Impact of Stratospheric Intrusions on Surface Ozone Air Quality

    3 / 2020

    JPL Center for Climate Sciences Seminar Series

    New high-resolution global composition forecast

    11 / 5 / 2018

    Invited speaker and panelist. Sixth Arab-American Frontiers of Science, Engineering, and Medicine Symposium, Kuwait City, Kuwait, November 4-6, 2018

    Air Pollution Forecasts using the NASA GEOS Model

    6 / 7 / 2018

    The International Cooperative for Aerosol Prediciton (ICAP) 10th working group meeting, UK Met Office, Exeter, England, June 6-8, 2018

    Other

    Near real-time air quality forecasts using the NASA GEOS model

    6 / 2021

    TEMPO Science Team Meeting

    Near real-time air quality forecasts using the NASA GEOS model

    4 / 2021

    EGU General Assembly 2021

    Evaluation of the GEOS-Chem UCX Stratosphere in the GEOS Composition Forecast System

    1 / 2021

    AMS 101st Annual Meeting

    Evaluation of the GEOS-Chem UCX Stratosphere in the GEOS Composition Forecast System

    12 / 2020

    Poster at AGU Fall Meeting 2020 (virtual)

    NASA GEOS Composition Forecast System: “GEOS-CF”

    8 / 2020

    TEMPO Science Team Meeting (Virtual)

    NASA GEOS Composition Forecast System: “GEOS-CF”

    6 / 2020

    TOLNET-Pandora-TEMPO Science Team Meeting (Virtual)

    NASA’s High-Resolution GEOS Forecasting and Reanalysis Products: Impact of Stratospheric Intrusions on Surface Ozone Air Quality

    3 / 2020

    OCTAV-UTLS Workshop, JPL Table Mountain Facility, CA

    High-Resolution Global Coupled Chemistry-Meteorology Simulations using the NASA GEOS Composition Forecast System: GEOS-CF

    1 / 13 / 2020

    AMS Annual Meeting, Boston, MA, 13-16 January 2020

    NASA's High-Resolution GEOS Forecasting and Reanalysis Products: Impact of Stratospheric Intrusions on Surface Ozone Air Quality

    1 / 16 / 2020

    AMS Annual Meeting, Boston, MA, 13-16 January 2020

    Predicting more than just weather:  New high resolution forecasts of composition from GEOS

    1 / 14 / 2020

    NASA Hyperwall Science Stories at Booth #301, AMS Annual Meeting, Boston, MA, 13-16 January 2020

    Local to Global Air Quality Simulations using the NASA GEOS Composition Forecast Model GEOS-CF

    10 / 2019

    18th Annual CMAS Conference, Chapel Hill, NC, October 21-23, 2019

    Air Pollution Forecasts using the NASA GEOS Model:  A unified Tool from Local to Global Scales

    7 / 2019

    NASA Health and Air Quality Applied Science Team HAQAST6 Meeting, Pasadena, California, July 10-12, 2019

    Near real-time forecasts at 25km horizontal resolution

    5 / 2019

    The 9th International GEOS-Chem Meeting, Cambridge, Massachusetts, May 6-9, 2019

    Air Quality Forecasts using the NASA GEOS Composition Modeling and Data Assimilation System

    4 / 2019

    EGU General Assembly 2019, Vienna, Austria, April 8-12, 2019

    Application of NASA's new global high-resolution air quality forecasts: Stratospheric intrusion-influenced ozone exceedance events in the USA

    12 / 2018

    AGU Fall Meeting 2018, Washington, DC, December 10-14, 2018

    Stratospheric Intrusion Catalog: A 10-year Compilation of Events Identified by using an Objective Feature Tracking Model with NASA’s MERRA-2 Reanalysis

    6 / 2018

    Meteorology Department, University of Reading, Reading, England, June 5, 2018

    Air Pollution Forecasts using the NASA GEOS Model

    6 / 2018

    Copernicus Atmosphere Monitoring Service (CAMS), European Centre for Medium-range Weather Forecasts (ECMWF), Reading, England, June 4, 2018

    Stratospheric Intrusion Catalog: A 10-year Compilation of Events Identified by using an Objective Feature Tracking Model with NASA’s MERRA-2 Reanalysis

    2 / 2018

    Oral presentation at the SPARC Workshop on The UTLS: Current status and emerging challenges.  Workshop held in Mainz, Germany, February 5-8, 2018.

    Stratospheric Intrusion Catalog: A 10-year Compilation of Events Identified by using an Objective Feature Tracking Model with NASA’s MERRA-2 Reanalysis

    12 / 2017

    Oral presentation at the 2017 AGU Fall Meeting, New Orleans, LA

    Air Pollution Forecasts using the NASA GEOS Model: A Unified Tool from Local to Global Scales

    12 / 2017

    Oral presentation at 2017 AGU Fall Meeting, New Orleans, LA

    Stratospheric intrusion-influenced ozone air quality exceedences investigated in the NASA MERRA-2 Reanalysis

    11 / 2017

    Oral presentation at the 5th International Conference on Reanalysis (ICR5) held in Rome, Italy, November 13-17, 2017.

    Influence of mid-latitude cyclones on European background surface ozone investigated in observations and multiple reanalyses

    11 / 2017

    Poster presentation at the 5th International Conference on Reanalysis (ICR5) held in Rome, Italy, November 13-17, 2017

    Air Pollution Forecasts using the NASA GEOS Model: A Unified Tool from Local to Global Scales

    10 / 2017

    Oral presentation at the 2017 Young Scientist Forum for Code 600, NASA/GSFC, Greenbelt, MD, on October 30, 2017.

    The influence of mid-latitude cyclones on European background surface ozone

    4 / 2017

    Oral presentation at the joint U.S. EPA, the Task Force on Hemispheric Transport of Air Pollution (TF HTAP), and the Air Quality Model Evaluation International Initiative (AQMEII) workshop "Air Quality in a Changing World", held at the US EPA, Research Triangle Park, NC, April 3-6, 2017.

    Regional Differences in Stratospheric Intrusions over the USA Investigated using the NASA MERRA-2 Reanalysis

    12 / 2016

    Poster presentation at the 2016 AGU Fall Meeting, San Francisco, CA

    Regional differences in stratospheric intrusions over the USA investigated using the MERRA-2 Reanalysis

    10 / 2016

    Oral presentation at the 2016 Young Scientist Program for Code 610, NASA/GSFC, Greenbelt, MD, USA

    Stratospheric intrusions investigated using high-resolution global simulations from the NASA GEOS-5 model

    9 / 2016

    Poster presentation at the International Global Atmospheric Chemistry (IGAC) Project 2016 Science Conference, Breckenridge, CO, USA

    Regional differences in stratospheric intrusions over the USA investigated using the NASA MERRA-2 Reanalysis

    9 / 2016

    Poster presentation at the International Global Atmospheric Chemistry (IGAC) Project 2016 Science Conference, Breckenridge, CO, USA

    The influence of mid-latitude cyclone tracks on surface ozone at remote European coastal monitoring sites

    3 / 2016

    Oral presentation at the 10th International Conference on Air Quality –
    Science and Application, Milan, Italy
     

    The influence of the North Atlantic Oscillation on tropospheric distributions of O3 and CO

    12 / 2015

    Oral presentation at the American Geophysical Union (AGU) Fall meeting,
    San Francisco, California, USA
     

    Mid-latitude storm track variability and its influence on atmospheric composition

    5 / 2014

    Poster at the IGAC/SPARC Chemistry-Climate Model Initiative (CCMI) Workshop, Lancaster, UK

    Mid-latitude storm track variability and its influence on atmospheric composition

    12 / 2013

    Poster at the AGU Fall meeting, San Francisco, California, USA
     

    Brief Bio

    Dr. Knowland is a lead scientist in the development of NASA GMAO’s atmospheric composition forecast system, GEOS-CF.  She directs the transition from research & development to the production system and leads the evaluation of stratospheric composition in the GEOS-CF.  Dr. Knowland’s research interests include both chemical and dynamical drivers of stratospheric and tropospheric composition. She is a member of the World Meteorological Organization (WMO) Global Air Quality Forecast and Information System (GAFIS) Steering Committee and Co-lead of Group 2 “Best practices and challenges for Air Quality Forecast Systems”.

    Publications

    Refereed

    Duncan, B. N., C. A. Malings, K. E. Knowland, et al. D. C. Anderson, A. I. Prados, C. A. Keller, K. R. Cromar, S. Pawson, and H. Ensz. 2021. "Augmenting the Standard Operating Procedures of Health and Air Quality Stakeholders With NASA Resources." GeoHealth 5 (9): [10.1029/2021gh000451]

    Lee, J. D., F. A. Squires, T. Sherwen, et al. S. E. Wilde, S. J. Cliff, L. J. Carpenter, J. R. Hopkins, S. J. Bauguitte, C. Reed, P. Barker, G. Allen, T. J. Bannan, E. Matthews, A. Mehra, C. Percival, D. E. Heard, L. K. Whalley, G. V. Ronnie, S. Seldon, T. Ingham, C. A. Keller, K. E. Knowland, E. G. Nisbet, and S. Andrews. 2021. "Ozone production and precursor emission from wildfires in Africa." Environmental Science: Atmospheres (Accepted) [10.1039/d1ea00041a]

    Gronoff, G., T. Berkoff, K. Knowland, et al. L. Lei, M. Shook, B. Fabbri, W. Carrion, and A. Langford. 2021. "Case study of stratospheric Intrusion above Hampton, Virginia: lidar-observation and modeling analysis." Atmospheric Environment 118498 [10.1016/j.atmosenv.2021.118498]

    Malings, C., K. E. Knowland, C. A. Keller, and S. E. Cohn. 2021. "Sub‐City Scale Hourly Air Quality Forecasting by Combining Models, Satellite Observations, and Ground Measurements." Earth and Space Science 8 (7): [10.1029/2021ea001743]

    Johnson, M. S., K. Strawbridge, K. E. Knowland, C. Keller, and M. Travis. 2021. "Long-range transport of Siberian biomass burning emissions to North America during FIREX-AQ." Atmospheric Environment 252 118241 [10.1016/j.atmosenv.2021.118241]

    Keller, C. A., K. E. Knowland, B. N. Duncan, et al. J. Liu, D. C. Anderson, S. Das, R. A. Lucchesi, E. W. Lundgren, J. M. Nicely, E. Nielsen, L. E. Ott, E. Saunders, S. A. Strode, P. A. Wales, D. J. Jacob, and S. Pawson. 2021. "Description of the NASA GEOS Composition Forecast Modeling System GEOS‐CF v1.0." Journal of Advances in Modeling Earth Systems 13 (4): [10.1029/2020ms002413]

    Keller, C. A., M. J. Evans, K. E. Knowland, et al. C. A. Hasenkopf, S. Modekurty, R. A. Lucchesi, T. Oda, B. B. Franca, F. C. Mandarino, M. V. Díaz Suárez, R. G. Ryan, L. H. Fakes, and S. Pawson. 2021. "Global impact of COVID-19 restrictions on the surface concentrations of nitrogen dioxide and ozone." Atmospheric Chemistry and Physics 21 (5): 3555-3592 [10.5194/acp-21-3555-2021]

    Robinson, J., A. Kotsakis, F. Santos, et al. R. Swap, K. E. Knowland, G. Labow, V. Connors, M. Tzortziou, N. Abuhassan, M. Tiefengraber, and A. Cede. 2020. "Using networked Pandora observations to capture spatiotemporal changes in total column ozone associated with stratosphere-to-troposphere transport." Atmospheric Research 238 104872 [10.1016/j.atmosres.2020.104872]

    Dacic, N., J. T. Sullivan, K. E. Knowland, et al. G. M. Wolfe, L. D. Oman, T. A. Berkoff, and G. P. Gronoff. 2019. "Evaluation of NASA's high-resolution global composition simulations: Understanding a pollution event in the Chesapeake Bay during the summer 2017 OWLETS campaign." Atmospheric Environment 117133 [10.1016/j.atmosenv.2019.117133]

    Wargan, K., C. Orbe, S. Pawson, et al. J. R. Ziemke, L. D. Oman, M. A. Olsen, L. Coy, and K. E. Knowland. 2018. "Recent decline in extratropical lower stratospheric ozone attributed to circulation changes." Geophysical Research Letters [10.1029/2018gl077406]

    Knowland, K. E., R. M. Doherty, K. I. Hodges, and L. E. Ott. 2017. "The influence of mid-latitude cyclones on European background surface ozone." Atmospheric Chemistry and Physics 17 (20): 12421-12447 [10.5194/acp-17-12421-2017]

    Knowland, K. E., L. E. Ott, B. N. Duncan, and K. Wargan. 2017. "Stratospheric intrusion-influenced ozone air quality exceedances investigated in the NASA MERRA-2 Reanalysis." Geophysical Research Letters 44 (10): 691–10,701 [10.1002/2017gl074532]

    Knowland, K. E., R. M. Doherty, and K. I. Hodges. 2015. "The effects of springtime mid-latitude storms on trace gas composition determined from the MACC reanalysis." Atmospheric Chemistry and Physics 15 (6): 3605--3628 [10.5194/acp-15-3605-2015]

    Knowland, K. E., J. R. Gyakum, and C. A. Lin. 2010. "A study of the meteorological conditions associated with anomalously early and late openings of a Northwest Territories winter road." Arctic 63 (2): 227--239 [http://dx.doi.org/10.14430/arctic977]

    Non-Refereed

    Knowland, K. E., C. A. Keller, and R. A. Lucchesi. 2020. "File Specification for GEOS-CF Products." GMAO Office Note No. 17 (Version 1.1), 37pp, available from http://gmao.gsfc.nasa.gov/pubs/office_notes

                                                                                                                                                                                            
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