Dr. Ellsworth J Welton

Dr. Ellsworth J Welton

  • RSCH AST, EARTH SCIENCES REMOTE SENS
  • 301.614.6279 | 301.614.5492
  • NASA/GSFC
  • Mail Code: 612
  • Greenbelt , MD 20771
  • Employer: NASA
  • Brief Bio

    Dr. Welton has specialized in aerosol related research since 1994, particularly characterization of the optical and physical properties of various aerosol species. In addition, he is an expert in the use of lidar and radiometry to retrieve aerosol and cloud properties. He has been active in lidar research since 1996, and is the Principal Investigator for the NASA Micro Pulse Lidar Network (MPLNET) – a federated network of lidar sites around the world. He is also the co-chair of the World Meteorological Organization (WMO) Global Atmospheric Watch (GAW) Aerosol Lidar Observation Network (GALION).

    Dr. Welton has been involved in numerous international field campaigns and co-led the development of several international research initiatives. Dr. Welton has also participated in NASA satellite missions as: atmospheric team member on NASA’s Geoscience Laser Altimeter System (GLAS), the Deputy Project Scientist for NASA's Glory mission, the former Project Scientist on the ISS Cloud-Aerosol Transport System - CATS (2011-2013), and is a science team member for the agency’s current lidar mission, CALIPSO. Finally, Dr. Welton is a member of the science working group formulating the Aerosols, Clouds, and Ecosystems (ACE) mission recommended in the 2007 NRC Earth Sciences Decadal report for NASA.

    Dr. Welton received a B.S. in Physics in 1993 from Jacksonville University, an M.S. in Physics in 1996 and a Ph.D. in physics in 1998 from the University of Miami. He has been with the Laboratory for Atmospheres at NASA Goddard Space Flight Center since 1999, first as a contractor, then an assistant research professor at the University of Maryland Baltimore County, until he became a NASA civil servant in 2002.

    Current Projects

    NASA Micro Pulse Lidar Network (MPLNET)

    The NASA Micro-Pulse Lidar Network (MPLNET) is a federated network of Micro-Pulse Lidar (MPL) systems designed to measure aerosol and cloud vertical structure continuously, day and night, over long time periods required to contribute to climate change studies and provide ground validation for satellite sensors in the Earth Observing System (EOS) and related aerosol modeling efforts. Most MPLNET sites are co-located with sites in the NASA Aerosol Robotic Network (AERONET). These joint super sites provide both column and vertically resolved aerosol and cloud data, such as: optical depth, single scatter albedo, size distribution, aerosol and cloud layer heights, planetary boundary layer (PBL) structure and evolution, and profiles of extinction and backscatter. MPLNET is a member of the WMO GAW Aerosol Lidar Observation Network (GALION).
    mplnet.gsfc.nasa.gov

    Education

    1998    University of Miami - Physics. PhD
    1996    University of Miami - Physics. MS
    1993    Jacksonville University - Physics. BS

    Professional Service

    2000 - present    NASA Micro Pulse Lidar Network (MPLNET). Principal Investigator/Project Head
    2017 - present    WMO Sand and Dust Storm Warning and Advisory System. Pan-American Region Steering Committee Member.
    2016 - present    WMO Expert Team on Data Centers. Committee Member.
    2014 - present    WMO Global Atmospheric Watch Aerosol Lidar Observation Network (GALION). Co-Chair.
    2011 - present    European Project: Aerosols, Clouds, and Trace gases Research Infrastructure Network (ACTRIS). Proposal Reviewer
    1996 - present   American Geophysical Union. Member.
    2007 - 2014       WMO Global Atmospheric Watch Aerosol Lidar Observation Network (GALION). Steering Committee.
    2006 - 2014       NRC NASA Decadal Aerosols, Clouds, and Ecosystems (ACE) mission development team
    2011 - 2013       NASA ISS Cloud Aerosol Transport System (CATS) Lidar. Project Scientist
    2004 - 2013       NASA Goddard Laser Safety Subcommittee
    2010 - 2011       NASA Glory Mission. Deputy Project Scientist
    2005 - 2006       IPCC 2007. Expert Reviewer
    2004 - 2008       NASA Goddard Aerosol Research Group, Aerocenter. Founding Committee Member
    2000 - 2006       NASA Geoscience Laser Altimeter System (GLAS) Mission. Atmospheric Science Team
     

    Awards

    2017   Naval Research Laboratory Alan Berman Research Publication Award
    2014   NASA Goddard Honor Award for Exceptional Achievement in Leadership
    2014   Naval Research Laboratory Alan Berman Research Publication Award
    2011   NASA Group Achievement Award, Glory Project Team
    2006   NASA Goddard Laboratory for Atmospheres Peer Award
    2005   Federal Laboratory Consortium Regional Excellence in Technology Transfer Award
    2005   NASA Goddard Special Act Award
    2004   NASA Goddard Laboratory for Atmospheres Peer Award
    2003   NASA Goddard Performance Award
    2001   NASA Goddard Exceptional Scientific Support Award
    1997   Outstanding Student Paper, American Geophysical Union Fall Meeting
    1993   William B. Gager Physics Research Award, Jacksonville University
    1993   American Institute of Physics, Sigma Pi Sigma Honor Society
     

    Grants

    01/01/2000 - NASA Micro Pulse Lidar Network (MPLNET), NASA
     2000 - present ; Principal Investigator, Project Head
    01/01/2011 AERONET/MPLNET SEAC4RS, NASA
    2011 - 2014 ; Co Principal Investigator
    01/01/2011 CATS ISS Mission, NASA
    2011 - 2013  ; Project Scientist
    01/01/2010 CALIPSO GEOS-5 Analysis, NASA
    2010 - 2013 ; Principal Investigator
    01/01/2008 Goddard IRAD, ACE Laser Development, NASA Goddard
    2008 - 2009 ; Principal Investigator
    01/01/2007 Goddard IRAD, ACE Multi-Beam Lidar, NASA Goddard
    2007 - 2008 ; Principal Investigator
    01/01/2007 DECISIONS, Improvement of PBL Parameterization in NCEP, NASA
    2007 - 2010 ; Co Investigator
    01/01/2007 CALIPSO Data Assimilation in NAAPS, NASA
    2007 - 2010 ; Co Investigator
    01/01/2007 CALIPSO Data Assimilation in GEOS5, NASA
    2007 - 2010  ; Co Investigator
    01/01/2006 Goddard IRAD, Climate 1 Mission, NASA Goddard
    2006 - 2007 ; Co Investigator, Lidar Lead
    01/01/2006 Goddard IRAD, Biomm-L, NASA Goddard
    2006 - 2007 ; Co Investigator, Aerosol Applications
    01/01/2004 Goddard IRAD, Fiber Laser Development, NASA Goddard
    2004 - 2005  ; Co Investigator
    01/01/2003 DECISIONS, AERONET/MPLNET Synergy Tool, NASA
    2003 - 2005  ; Co Investigator
    01/01/2001 SIMBIOS Lidar Observations, NASA
    2001 - 2002 ; Co Principal Investigator

    Other Professional Information

    Dr. Welton is the author and co-author of over 70 publications with an h-index of 34 (Researcher ID, April 2019).

    Researcher ID
    Google Scholar
    Research Gate

    Only selected publications shown here

    Selected Publications

    Refereed

    Lolli, S., E. J. Welton, and J. R. Campbell. 2013. "Evaluating Light Rain Drop Size Estimates from Multi-Wavelength Micropulse Lidar Network Profiling." Journal of Atmospheric and Oceanic Technology, 30: 2798-2807.

    Reid, J. S., E. J. Hyer, R. S. Johnson, et al. B. N. Holben, R. J. Yokelson, J. Zhang, J. R. Campbell, S. A. Christopher, L. D. Girolamo, L. Giglio, R. E. Holz, C. Kearney, J. Miettinen, E. A. Reid, F. J. Turk, J. Wang, P. Xian, G. Zhao, R. Balasubramanian, B. N. Chew, S. Janjai, N. Lagrosas, P. Lestari, N. H. Lin, M. Mahmud, A. X. Nguyen, B. Norris, N. T. Oanh, M. Oo, S. V. Salinas, E. J. Welton, and S. C. Liew. 2013. "Observing and understanding the Southeast Asian aerosol system by remote sensing: An initial review and analysis for the Seven Southeast Asian Studies (7SEAS) program." Atmospheric Research, 122: 403-468 [10.1016/j.atmosres.2012.06.005]

    Lewis, J. R., E. J. Welton, A. M. Molod, and E. Joseph. 2013. "Improved boundary layer depth retrievals from MPLNET." J. Geophys. Res. Atmos., 118 (17): 9870-9879 [10.1002/jgrd.50570]

    Wang, S.-H., S.-C. Tsay, N. Lin, et al. N.-Y. C. Hsu, S. W. Bell, C. Li, Q. Ji, M.-J. Jeong, R. A. Hansell, E. Welton, B. Holben, G. Sheyu, Y. Chu, S. Chang, J. Lou, and W. Chiang. 2011. "First detailed observations of long-range transported dust over the northern South China Sea." Atmospheric Environment, 45 (27): 4804-4808 [10.1016/j.atmosenv.2011.04.077]

    Campbell, J., E. J. Welton, and J. Spinhirne. 2009. "Continuous Lidar Monitoring of Polar Stratospheric Clouds at the South Pole." Bulletin of the American Meteorological Society, 90 (5): 613-617 [10.1175/2008BAMS2754.1]

    Schmid, B., R. Ferrare, C. Flynn, et al. R. Elleman, D. Covert, A. Strawa, E. J. Welton, D. Turner, H. Jonsson, J. Redemann, J. Eiilers, J. Ricci, A. G. Hallar, M. Clayton, J. Michalsky, A. Smirnov, B. Holben, B. Holben, and J. Bernard. 2006. "How well do state-of-the-art techniques measuring the vertical profile of tropospheric aerosol extinction compare?" J. Geophys. Res., 111 (D5): D05S07 [10.1029/2005JD005837]

    Spinhirne, J., E. J. Welton, D. L. Hlavka, W. D. Hart, and S. P. Palm. 2005. "Cloud and aerosol measurements from GLAS: Overview and initial results." Geophysical Research Letters, 32 (22): L22S03 [10.1029/2005GL023507]

    Colarco, P. R., M. R. Schoeberl, B. G. Doddridge, et al. L. T. Marufu, O. Torres, and E. J. Welton. 2004. "Transport of smoke from Canadian forest fires to the surface near Washington, D.C.: Injection height, entrainment, and optical properties." J. Geophys. Res., 109 (D6): D06203 [10.1029/2003JD004248]

    Welton, E. J., and J. Campbell. 2002. "Micro-Pulse Lidar signals: Uncertainty analysis." J Atmos Ocea Tech, 19: 2089-2094.

    Welton, E. J., K. Voss, P. Quinn, et al. P. Flatau, K. Markowicz, J. Campbell, J. Spinhirne, H. Gordon, and J. Johnson. 2002. "Measurements of aerosol vertical profiles and optical properties during INDOEX 1999 using micropulse lidars." J. Geophys. Res., 107 (D19): 8019 [10.1029/2000JD000038]

    Campbell, J. R., D. L. Hlavka, E. J. Welton, et al. C. J. Flynn, D. D. Turner, J. D. Spinhirne, V. S. Scott, and I. H. Hwang. 2002. "Full-Time, Eye-Safe Cloud and Aerosol Lidar Observation at Atmospheric Radiation Measurement Program Sites: Instruments and Data Processing." J Atmos Ocea Tech, 19 (4): 431-442 [10.1175/1520-0426(2002)019<0431:FTESCA>2.0.CO;2]

    Welton, E. J., J. Campbell, J. Spinhirne, and V. Scott. 2001. "Global Monitoring of clouds and aerolsols using a network of micro-pulse lidar systems in Lidar Remote Sensing for Industry and Enviormental Monitoring." Proc SPIE, 4153: 151-158.

    Welton, E. J., K. Voss, H. Gordon, et al. H. Maring, A. Smirnov, B. Holben, B. Schmid, J. Livingston, P. Russell, P. Durkee, P. Formenti, and M. Andreae. 2000. "Ground-Based Lidar Measurements of Aerosols During ACE-2: Instrument Description Results and Comparisons with other Ground-Based Airborne Measurements." Tellus B, 52: 635-650.

    Ackerman, A. S., O. Toon, D. Stevens, et al. A. Heymsfield, V. Ramanathan, and E. J. Welton. 2000. "Reduction of Tropical Cloudiness by Soot." Science, 288 (5468): 1042-1047 [10.1126/science.288.5468.1042]

    Brief Bio

    Dr. Welton has specialized in aerosol related research since 1994, particularly characterization of the optical and physical properties of various aerosol species. In addition, he is an expert in the use of lidar and radiometry to retrieve aerosol and cloud properties. He has been active in lidar research since 1996, and is the Principal Investigator for the NASA Micro Pulse Lidar Network (MPLNET) – a federated network of lidar sites around the world. He is also the co-chair of the World Meteorological Organization (WMO) Global Atmospheric Watch (GAW) Aerosol Lidar Observation Network (GALION).

    Dr. Welton has been involved in numerous international field campaigns and co-led the development of several international research initiatives. Dr. Welton has also participated in NASA satellite missions as: atmospheric team member on NASA’s Geoscience Laser Altimeter System (GLAS), the Deputy Project Scientist for NASA's Glory mission, the former Project Scientist on the ISS Cloud-Aerosol Transport System - CATS (2011-2013), and is a science team member for the agency’s current lidar mission, CALIPSO. Finally, Dr. Welton is a member of the science working group formulating the Aerosols, Clouds, and Ecosystems (ACE) mission recommended in the 2007 NRC Earth Sciences Decadal report for NASA.

    Dr. Welton received a B.S. in Physics in 1993 from Jacksonville University, an M.S. in Physics in 1996 and a Ph.D. in physics in 1998 from the University of Miami. He has been with the Laboratory for Atmospheres at NASA Goddard Space Flight Center since 1999, first as a contractor, then an assistant research professor at the University of Maryland Baltimore County, until he became a NASA civil servant in 2002.

    Selected Publications

    Refereed

    Lolli, S., E. J. Welton, and J. R. Campbell. 2013. "Evaluating Light Rain Drop Size Estimates from Multi-Wavelength Micropulse Lidar Network Profiling." Journal of Atmospheric and Oceanic Technology 30 2798-2807

    Reid, J. S., E. J. Hyer, R. S. Johnson, et al. B. N. Holben, R. J. Yokelson, J. Zhang, J. R. Campbell, S. A. Christopher, L. D. Girolamo, L. Giglio, R. E. Holz, C. Kearney, J. Miettinen, E. A. Reid, F. J. Turk, J. Wang, P. Xian, G. Zhao, R. Balasubramanian, B. N. Chew, S. Janjai, N. Lagrosas, P. Lestari, N. H. Lin, M. Mahmud, A. X. Nguyen, B. Norris, N. T. Oanh, M. Oo, S. V. Salinas, E. J. Welton, and S. C. Liew. 2013. "Observing and understanding the Southeast Asian aerosol system by remote sensing: An initial review and analysis for the Seven Southeast Asian Studies (7SEAS) program." Atmospheric Research 122 403-468 [10.1016/j.atmosres.2012.06.005]

    Lewis, J. R., E. J. Welton, A. M. Molod, and E. Joseph. 2013. "Improved boundary layer depth retrievals from MPLNET." J. Geophys. Res. Atmos. 118 (17): 9870-9879 [10.1002/jgrd.50570]

    Wang, S.-H., S.-C. Tsay, N. Lin, et al. N.-Y. C. Hsu, S. W. Bell, C. Li, Q. Ji, M.-J. Jeong, R. A. Hansell, E. Welton, B. Holben, G. Sheyu, Y. Chu, S. Chang, J. Lou, and W. Chiang. 2011. "First detailed observations of long-range transported dust over the northern South China Sea." Atmospheric Environment 45 (27): 4804-4808 [10.1016/j.atmosenv.2011.04.077]

    Campbell, J., E. J. Welton, and J. Spinhirne. 2009. "Continuous Lidar Monitoring of Polar Stratospheric Clouds at the South Pole." Bulletin of the American Meteorological Society 90 (5): 613-617 [10.1175/2008BAMS2754.1]

    Schmid, B., R. Ferrare, C. Flynn, et al. R. Elleman, D. Covert, A. Strawa, E. J. Welton, D. Turner, H. Jonsson, J. Redemann, J. Eiilers, J. Ricci, A. G. Hallar, M. Clayton, J. Michalsky, A. Smirnov, B. Holben, B. Holben, and J. Bernard. 2006. "How well do state-of-the-art techniques measuring the vertical profile of tropospheric aerosol extinction compare?" J. Geophys. Res. 111 (D5): D05S07 [10.1029/2005JD005837]

    Spinhirne, J., E. J. Welton, D. L. Hlavka, W. D. Hart, and S. P. Palm. 2005. "Cloud and aerosol measurements from GLAS: Overview and initial results." Geophysical Research Letters 32 (22): L22S03 [10.1029/2005GL023507]

    Colarco, P. R., M. R. Schoeberl, B. G. Doddridge, et al. L. T. Marufu, O. Torres, and E. J. Welton. 2004. "Transport of smoke from Canadian forest fires to the surface near Washington, D.C.: Injection height, entrainment, and optical properties." J. Geophys. Res. 109 (D6): D06203 [10.1029/2003JD004248]

    Welton, E. J., and J. Campbell. 2002. "Micro-Pulse Lidar signals: Uncertainty analysis." J Atmos Ocea Tech 19 2089-2094

    Welton, E. J., K. Voss, P. Quinn, et al. P. Flatau, K. Markowicz, J. Campbell, J. Spinhirne, H. Gordon, and J. Johnson. 2002. "Measurements of aerosol vertical profiles and optical properties during INDOEX 1999 using micropulse lidars." J. Geophys. Res. 107 (D19): 8019 [10.1029/2000JD000038]

    Campbell, J. R., D. L. Hlavka, E. J. Welton, et al. C. J. Flynn, D. D. Turner, J. D. Spinhirne, V. S. Scott, and I. H. Hwang. 2002. "Full-Time, Eye-Safe Cloud and Aerosol Lidar Observation at Atmospheric Radiation Measurement Program Sites: Instruments and Data Processing." J Atmos Ocea Tech 19 (4): 431-442 [10.1175/1520-0426(2002)019<0431:FTESCA>2.0.CO;2]

    Welton, E. J., J. Campbell, J. Spinhirne, and V. Scott. 2001. "Global Monitoring of clouds and aerolsols using a network of micro-pulse lidar systems in Lidar Remote Sensing for Industry and Enviormental Monitoring." Proc SPIE 4153 151-158

    Welton, E. J., K. Voss, H. Gordon, et al. H. Maring, A. Smirnov, B. Holben, B. Schmid, J. Livingston, P. Russell, P. Durkee, P. Formenti, and M. Andreae. 2000. "Ground-Based Lidar Measurements of Aerosols During ACE-2: Instrument Description Results and Comparisons with other Ground-Based Airborne Measurements." Tellus B 52 635-650

    Ackerman, A. S., O. Toon, D. Stevens, et al. A. Heymsfield, V. Ramanathan, and E. J. Welton. 2000. "Reduction of Tropical Cloudiness by Soot." Science 288 (5468): 1042-1047 [10.1126/science.288.5468.1042]

                                                                                                                                                                                            
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