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 80 publications with an h-index of 37 (Publons, January 2021).

    Publons

    Google Scholar

    Research Gate

    Publications

    Refereed

    Giles, D. M., A. Sinyuk, M. G. Sorokin, et al. J. S. Schafer, A. Smirnov, I. Slutsker, T. F. Eck, B. N. Holben, J. R. Lewis, J. R. Campbell, E. J. Welton, S. V. Korkin, and A. I. Lyapustin. 2019. "Advancements in the Aerosol Robotic Network (AERONET) Version 3 database – automated near-real-time quality control algorithm with improved cloud screening for Sun photometer aerosol optical depth (AOD) measurements." Atmospheric Measurement Techniques, 12 (1): 169-209 [10.5194/amt-12-169-2019]

    Hegarty, J. D., J. Lewis, E. L. McGrath-Spangler, et al. J. Henderson, A. J. Scarino, P. DeCola, R. Ferrare, M. Hicks, R. D. Adams-Selin, and E. J. Welton. 2018. "Analysis of the Planetary Boundary Layer Height during DISCOVER-AQ Baltimore–Washington, D.C., with Lidar and High-Resolution WRF Modeling." Journal of Applied Meteorology and Climatology, 57 (11): 2679-2696 [10.1175/jamc-d-18-0014.1]

    Lolli, S., P. Di Girolamo, B. Demoz, X. Li, and E. J. Welton. 2017. "Rain evaporation rate estimates from multi-wavelength lidar measurements and intercomparison against a model analytical solution." Journal of Atmospheric and Oceanic Technology , 34 (4): [10.1175/JTECH-D-16-0146.1]

    Tsay, S.-C., H. B. Maring, N.-H. Lin, et al. S. Buntoung, S. Chantara, H.-C. Chuang, P. M. Gabriel, C. Goodloe, B. N. Holben, T.-C. Hsiao, N.-Y. C. Hsu, S. Janjai, W. K. Lau, C.-T. Lee, J. Lee, A. M. Loftus, A. X. Nguyen, C. M. Nguyen, S. K. Pani, P. Pantina, A. M. Sayer, W.-K. Tao, S.-H. Wang, E. J. Welton, W. Wiriya, and M.-C. Yen. 2016. "Satellite-Surface Perspectives of Air Quality and Aerosol-Cloud Effects on the Environment: An Overview of 7-SEAS/BASELInE." Aero. Air Qual. Res., 16 (11): 2581-2602 [10.4209/aaqr.2016.08.0350]

    Lee, J., N.-Y. C. Hsu, C. Bettenhausen, et al. A. M. Sayer, C. J. Seftor, M.-J. Jeong, S.-C. Tsay, E. J. Welton, S.-H. Wang, and W.-N. Chen. 2016. "Evaluating the Height of Biomass Burning Smoke Aerosols Retrieved from Synergistic Use of Multiple Satellite Sensors over Southeast Asia." Aero. Air Qual. Res., 16: 2897-2906 [10.4209/aaqr.2015.08.0506]

    Lolli, S., J. R. Lewis, E. J. Welton, J. R. Campbell, and Y. Gu. 2016. "Understanding Seasonal Variability in thin Cirrus Clouds from Continuous MPLNET Observations at GSFC in 2012." EPJ Web of Conferences, 119: 11004 [10.1051/epjconf/201611911004]

    Campbell, J. R., S. Lolli, J. R. Lewis, Y. Gu, and E. J. Welton. 2016. "Daytime Cirrus Cloud Top-of-Atmosphere Radiative Forcing Properties at a Midlatitude Site and their Global Consequence." Journal of Applied Meteorology and Climatology, JAMC-D-15-0217.1 [10.1175/jamc-d-15-0217.1]

    Lolli, S., J. R. Lewis, J. R. Campbell, E. J. Welton, and Y. Gu. 2016. "Cirrus cloud radiative characteristics from continuous MPLNET profiling at GSFC in 2012." Optica Pura y Aplicada, 49 (1): 1-6 [10.7149/opa.49.1.1]

    Campbell, J. R., C. Ge, J. Wang, et al. E. J. Welton, A. Bucholtz, E. J. Hyer, E. A. Reid, B. N. Chew, S.-C. Liew, S. V. Salinas, S. Lolli, K. C. Kaku, P. Lynch, M. Mahmud, M. Mohamad, and B. N. Holben. 2016. "Applying Advanced Ground-Based Remote Sensing in the Southeast Asian Maritime Continent to Characterize Regional Proficiencies in Smoke Transport Modeling." Journal of Applied Meteorology and Climatology, 55 (1): 3-22 [10.1175/jamc-d-15-0083.1]

    Wang, S.-H., E. J. Welton, B. N. Holben, et al. S.-C. Tsay, N.-H. Lin, D. M. Giles, S. A. Stewart, S. Janjai, X. A. Nguyen, T.-C. Hsiao, W.-N. Chen, T.-H. Lin, S. Buntoung, S. Chantara, and W. Wiriya. 2015. "Vertical Distribution and Columnar Optical Properties of Springtime Biomass-Burning Aerosols over Northern Indochina during 2014 7-SEAS Campaign." Aerosol and Air Quality Research, 15: 2037-2050 [10.4209/aaqr.2015.05.0310]

    Nowottnick, E. P., P. R. Colarco, E. J. Welton, and A. M. Da Silva. 2015. "Use of the CALIOP vertical feature mask for evaluating global aerosol models." Atmospheric Measurement Techniques, 8: 3647-3669 [10.5194/amt-8-3647-2015]

    Lolli, S., E. J. Welton, J. R. Campbell, et al. E. Eloranta, B. N. Holben, B. N. Chew, and S. Salinas. 2014. "High Spectral Resolution Lidar and MPLNET Micro Pulse Lidar aerosol optical property retrieval intercomparison during the 2012 7-SEAS field campaign at Singapore." SPIE Proc. 9246, [doi:10.1117/12.2067812]

    Lolli, S., E. J. Welton, A. Benedetti, et al. L. Jones, M. Suttie, and S.-H. Wang. 2014. "MPLNET lidar data assimilation in the ECMWF MACC-II Aerosol system: evaluation of model performances at NCU lidar station." SPIE proc. 9246, [doi:10.1117/12.2068201]

    Tan, F. Y., W. S. Hee, S. L. Hwee, et al. K. Abdullah, L. Y. Tiem, M. Z. Matjafri, S. Lolli, B. Holben, and E. J. Welton. 2014. "Variation in daytime troposphereic aerosol via LIDAR and sunphotometer measurements in Penang, Malaysia." AIP Conference Proceedings, 1588 (1): 286-292 [10.1063/1.4866962]

    Eck, T. F., B. N. Holben, J. S. Reid, et al. A. Arola, R. A. Ferrare, C. A. Hostetler, S. N. Crumeyrolle, T. A. Berkoff, E. J. Welton, S. Lolli, A. I. Lyapustin, Y. Wang, J. S. Schafer, D. M. Giles, B. E. Anderson, K. L. Thornhill, P. Minnis, K. E. Pickering, C. P. Loughner, A. Smirnov, and A. Siniuk. 2014. "Observations of rapid aerosol optical depth enhancements in the vicinity of polluted cumulus clouds." Atmos. Chem. Phys., 14: 11633-11656 [10.5194/acp-14-11633-2014]

    Aryal, R. P., K. J. Voss, W. C. Keene, et al. J. L. Moody, E. J. Welton, and B. N. Holben. 2014. "Comparison of surface and column measurements of aerosol scattering properties over the western North Atlantic Ocean at Bermuda." Atmos. Chem. Phys., 14: 7617-7629 [10.5194/acp-14-7617-2014]

    Matsui, T., C. M. Ichoku, C. A. Randles, et al. T. L. Yuan, A. M. Da Silva, P. R. Colarco, D. Kim, R. C. Levy, A. M. Sayer, M. Chin, D. Giles, B. N. Holben, E. J. Welton, T. F. Eck, and L. A. Remer. 2014. "Current and Future Perspectives of Aerosol Research at NASA Goddard Space Flight Center." Bulletin of the American Meteorological Society, early view [10.1175/ BAMS-D-13-00153.1]

    Welton, E. J., 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.

    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.

    Wang, S.-H., S.-C. Tsay, N.-H. Lin, et al. S.-C. Chang, C. Li, E. J. Welton, B. N. Holben, N.-Y. C. Hsu, W. K. Lau, S. Lolli, C.-C. Kuo, H.-P. Chia, C.-Y. Chiu, C.-C. Lin, S. W. Bell, Q. Ji, R. A. Hansell, G.-R. Sheu, K.-H. Chi, and C.-M. Peng. 2013. "Origin, transport, and vertical distribution of atmospheric pollutants over the northern South China Sea during the 7-SEAS/Dongsha Experiment." Atmospheric Environment, 78: 124-133 [10.1016/j.atmosenv.2012.11.013]

    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]

    Tsay, S.-C., N.-Y. C. Hsu, W. K. Lau, et al. C. Li, P. M. Gabriel, Q. Ji, B. N. Holben, E. J. Welton, X. A. Nguyen, S. Janjai, N. H. Lin, J. S. Reid, J. Boonjawat, S. G. Howell, B. Huebert, J. S. Fu, R. A. Hansell, A. M. Sayer, R. Gautam, S.-H. Wang, C. S. Goodloe, L. R. Miko, P. K. Shu, A. M. Loftus, J. Huang, J. Y. Kim, M.-J. Jeong, and P. Pantina. 2013. "From BASE-ASIA toward 7-SEAS: A satellite-surface perspective of boreal spring biomass-burning aerosols and clouds in Southeast Asia." Atmospheric Environment, 78: 20-34 [10.1016/j.atmosenv.2012.12.013]

    Salinas, S., B. N. Chew, J. Miettinen, et al. J. R. Campbell, E. J. Welton, J. S. Reid, L. E. Yu, and S. C. Liew. 2013. "Physical and optical characteristics of the October 2010 haze event over Singapore: A photometric and lidar analysis." Atmospheric Research, 122: 555-570 [10.1016/j.atmosres.2012.05.021]

    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]

    Huang, J., N.-Y. C. Hsu, S.-C. Tsay, et al. B. N. Holben, E. J. Welton, A. Smirnov, M.-J. Jeong, R. A. Hansell, T. A. Berkoff, Z. Liu, G.-R. Liu, J. R. Campbell, S. C. Liew, and J. E. Barnes. 2012. "Evaluations of cirrus contamination and screening in ground aerosol observations using collocated lidar systems." J. Geophys. Res., 117 (D15): D15204 [10.1029/2012JD017757]

    Hansell, R. A., S.-C. Tsay, N.-Y. C. Hsu, et al. Q. Ji, S. W. Bell, B. N. Holben, E. J. Welton, T. L. Roush, W. Zhang, J. Huang, Z. Li, and H. Chen. 2012. "An assessment of the surface longwave direct radiative effect of airborne dust in Zhangye, China, during the Asian Monsoon Years field experiment (2008)." J. Geophys. Res., 117 (D16): D00K39 [10.1029/2011JD017370]

    Colarco, P. R., L. A. Remer, R. A. Kahn, R. C. Levy, and E. J. Welton. 2012. "Implications of satellite swath width on global aerosol optical thickness statistics." Atmos. Meas. Tech. Discuss., 5 (2): 2795-2820 [10.5194/amtd-5-2795-2012]

    Misra, A., S. N. Tripathi, D. S. Kaul, and E. J. Welton. 2012. "Study of MPLNET-Derived Aerosol Climatology over Kanpur, India, and Validation of CALIPSO Level 2 Version 3 Backscatter and Extinction Products." Journal of Atmospheric and Oceanic Technology, 29 (9): 1285-1294 [10.1175/JTECH-D-11-00162.1]

    Campbell, J., E. J. Welton, N. A. Krotkov, et al. K. Yang, S. A. Stewart, and M. Fromm. 2012. "Likely seeding of cirrus clouds by stratospheric Kasatochi volcanic aerosol particles near a mid-latitude tropopause fold." Atmospheric Environment, 46: 441-448 [10.1016/j.atmosenv.2011.09.027]

    Huang, J., N.-Y. C. Hsu, S.-C. Tsay, et al. M.-J. Jeong, B. N. Holben, T. A. Berkoff, and E. J. Welton. 2011. "Susceptibility of aerosol optical thickness retrievals to thin cirrus contamination during the BASE-ASIA campaign." J. Geophys. Res., 116 (D8): D08214 [10.1029/2010JD014910]

    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]

    Berkoff, T., S. Mikail, S. Tom, et al. F. Thomas, H. Raymond, E. J. Welton, and H. Brent. 2011. "Nocturnal Aerosol Optical Depth Measurements with a Small-Aperture Automated Photometer Using the Moon as a Light Source." Journal of Atmospheric and Oceanic Technology, 28 (10): 1297–1306 [10.1175/JTECH-D-10-05036.1]

    Liu, Y., W. Zifeng, W. Jun, et al. A. Richard, K. Robert, and E. J. Welton. 2011. "The effect of aerosol vertical profiles on satellite-estimated surface particle sulfate concentrations." Remote Sensing of Environment, 115 (2): 508-513 [10.1016/j.rse.2010.09.019]

    Chew, B., R. James, S. Jeffery, et al. M. David, E. J. Welton, V. Santo, and C. Soo. 2011. "Tropical cirrus cloud contamination in sun photometer data." Atmospheric Environment, 45 (37): 6724-6731 [10.1016/j.atmosenv.2011.08.017]

    Liu, J., Z. Youfei, L. Zhanqing, et al. F. Connor, E. J. Welton, and C. Mareen. 2011. "Transport, vertical structure and radiative properties of dust events in southeast China determined from ground and space sensors." Atmospheric Environment, 45 (35): 6469-6480 [10.1016/j.atmosenv.2011.04.031]

    Miller, D., S. Kang, A. Mark, et al. K. David, D. Oleg, E. J. Welton, M. David, and G. Paul. 2011. "Assessing boreal forest fire smoke aerosol impacts on U.S. air quality: A case study using multiple data sets." J. Geophys. Res., 116 (D22): D22209 [10.1029/2011JD016170]

    Wang, S.-H., N.-H. Lin, M.-D. Chou, et al. S.-C. Tsay, E. J. Welton, N.-Y. C. Hsu, D. M. Giles, G.-R. Liu, and B. N. Holben. 2010. "Profiling transboundary aerosols over Taiwan and assessing their radiative effects." J. Geophys. Res., 115 (D7): D00K31 [10.1029/2009JD013798]

    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]

    Ganguly, D., P. Ginoux, V. Ramaswamy, et al. O. Dubovik, E. J. Welton, E. Reid, and B. Holben. 2009. "Inferring the composition and concentration of aerosols by combining AERONET and MPLNET data: Comparison with other measurements and utilization to evaluate GCM output." J. Geophys. Res., 114 (D16): D16203 [10.1029/2009JD011895]

    Campbell, J., K. Sassen, and E. J. Welton. 2008. "Elevated Cloud and Aerosol Layer Retrievals from Micropulse Lidar Signal Profiles." J. Atmos. Ocean. Tech., 25 (5): 685-700 [10.1175/2007JTECHA1034.1]

    Kuzmanoski, M., M. Box, B. Schmid, et al. G. Box, J.-J. Wang, P. Russel, D. Bates, H. Johnson, E. J. Welton, R. Flagan, and J. Seinfield. 2007. "Aerosol properties computed aircraft-based observations during the ACE-Asia campaign: 2. A case study of lidar ratio closure and aerosol radiative effects." Aerosol Sci Tech, 41 (3): 231-243 [10.1080/02786820601146977]

    Lund, M., C. Toledano, G. Myhre, et al. K. Stebel, K. Yttri, V. Aaltonen, M. Johnsrud, M. Frioud, V. Cachorro, A. Frutos, H. Lihavainen, J. Campell, A. Chaikovsky, M. Shiobara, E. J. Welton, and K. Torseth. 2007. "Regional aerosol optical properties and radiative impact of the extreme smoke event in the European Arctic in Spring 2006." J Polar Meteor and Glaciology, 7: 5899-5915.

    Myhre, C. L., C. Toledano, G. Myhre, et al. K. Stebel, K. Yttri, V. Aaltonen, M. Johnsrud, M. Frioud, V. Cachorro, A. de Frutos, H. Lihavainen, J. Campell, A. Chaikovsky, M. Shiobara, E. J. Welton, and K. Torseth. 2007. "Regional aerosol optical properties and radiative impact of the extreme smoke event in the European Arctic in Spring 2006." J Polar Meteor and Glaciology, 7: 5899-5915.

    Shiobara, M., W. D. Hart, J. Campbell, et al. E. J. Welton, J. Spinhirne, R. Neuber, M. Yabuki, and T. A. Berkoff. 2006. "Arctic experiment for the ICESat/GLAS ground validation with a Micro-Pulse Lidar at Ny-Alesund, Svalbard." Polar Meteorol. Glaciol., 20: 28-39 [Full Text (Link)]

    Schmid, B., R. Ferrare, C. Flynn, et al. R. Elleman, D. Covert, A. Strawa, E. Welton, D. Turner, H. Jonsson, J. Redemann, J. Eilers, K. Ricci, A. Hallar, M. Clayton, J. Michalsky, A. Smirnov, B. N. Holben, and J. Barnard. 2006. "How well do state-of-the-art techniques measuring the vertical profile of tropospheric aerosol extinction compare?" J Geophys Res, 111 (D05S07): 25 pp.

    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]

    Torres, O., P. K. Bhartia, A. Syniuk, E. J. Welton, and B. N. Holben. 2005. "Total Ozone Mapping Spectrometer measurements of aerosol absorption from space: Comparison to SAFARI 2000 ground-based observations." J. Geophys. Res., 110 (D10): D10S18 [10.1029/2004JD004611]

    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]

    Hlavka, D. L., E. J. Welton, M. J. Mcgill, et al. J. D. Spinhirne, W. D. Hart, and S. P. Palm. 2005. "Aerosol and cloud optical depth from GLAS: Results and verification for an October 2003 California fire smoke case." Geophysical Research Letters, 32 (22): L22S07 [10.1029/2005GL023413]

    Quinn, P., D. Coffman, T. Bates, et al. E. J. Welton, D. Covert, T. Miller, J. Johnson, S. Maria, L. Russell, R. Arimoto, C. Carrico, M. Rood, and J. Anderson. 2004. "Aerosol optical properties measured on board the Ronald H Brown during ACE-Asia as a function of Aerosol chemical composition and source region." J. Geophys. Res. Atmos., 109 (D19): D19S01 [10.1029/2003JD004010]

    Kahn, R., J. Anderson, T. Anderson, et al. T. Bates, F. Brechtel, A. Clarke, E. Dutton, R. Flagan, R. Frouin, H. Fukushima, B. Holben, S. Howell, B. Huebert, A. Jefferson, H. Jonsson, K. Carricol, O. Kalashnikova, J. Kim, S. Kim, P. Kus, W. Li, J. Livingston, S. Masonis, C. McNaughton, J. Merrill, S. Mukai, T. Murayama, T. Nakajima, P. Quinn, J. Redemann, M. Rood, P. Russell, I. Sano, B. Schmid, J. Seinfeld, N. Sugimoto, J. Wang, E. J. Welton, J. Won, and S. Yoon. 2004. "Environmental snapshots from ACE-Asia." J. Geophys. Res., 109 (D19): D19S14 [10.1029/2003JD004339]

    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]

    Schmid, B., J. Redemann, P. Russell, et al. P. Hobbs, D. L. Hlavka, M. J. Mcgill, B. Holben, E. J. Welton, J. Campbell, O. Torres, R. A. Kahn, D. Diner, M. Helmlinger, D. Chu, C. RoblesGonzalez, and G. deLeeuw. 2003. "Coordinated airborne, spaceborne, and ground-based measurements of massive thick aerosol layers during the dry season in southern Africa." J. Geophys. Res., 108 (D13): 8496 [10.1029/2002JD002297]

    Livingston, J., P. Russell, J. Reid, et al. J. Redemann, B. Schmid, D. Allen, O. Torres, R. Levy, L. Remer, B. Holben, A. Smirnov, O. Dubovik, E. J. Welton, J. Campbell, J. Wang, and S. Christopher. 2003. "Airborne Sun photometer measurements of aerosol optical depth and columnar water vapor during the Puerto Rico Dust Experiment and comparison with land, aircraft, and satellite measurements." J Geophys Res, 108 (D19): 8588 [10.1029/2002JD002520]

    Reid, J., J. Kinney, D. Westphal, et al. B. Holben, E. J. Welton, S.-C. Tsay, D. Eleuterio, J. Campbell, S. Christopher, P. R. Colarco, H. Jonsson, J. Livingston, H. Maring, M. Meier, P. Pilewskie, J. Prospero, E. Reid, L. Remer, P. Russell, D. Savoie, A. Smirnov, and D. Tanre. 2003. "Analysis of measurements of Saharan dust by airborne and ground-based remote sensing methods during the Puerto Rico Dust Experiment (PRIDE)." J. Geophys. Res., 108 (D19): 8586 [10.1029/2002JD002493]

    Schmid, B., D. Hegg, J. Wang, et al. D. Bates, J. Redemann, P. Russell, J. Livingston, H. Jonsson, E. J. Welton, J. Seinfeld, R. Flagan, D. Covert, O. Dubovik, and A. Jefferson. 2003. "Column closure studies of lower tropospheric aerosol and water vapor during ACE-Asia using airborne Sun photometer and airborne in situ and ship-based lidar measurements." J. Geophys. Res., 108 (D23): 8656 [10.1029/2002JD003361]

    Markowicz, K., P. Flatau, A. Vogelmann, P. Quinn, and E. J. Welton. 2003. "Clear-sky infrared aerosol radiative forcing at the surface and the top of the atmosphere." QJR Meteorl Soc, 129 (594): 2927-2947 [10.1256/qj.02.224]

    Campbell, J., E. J. Welton, J. Spinhirne, et al. Q. Ji, S.-C. Tsay, S. Piketh, M. Barenbrug, and B. Holben. 2003. "Micropulse lidar observations of tropospheric aerosols over northeastern South Africa during the ARREX and SAFARI 2000 dry season experiments." J Geophys Res, 108 (D13): 8497 [10.1029/2002JD002563]

    Colarco, P. R., O. Toon, J. Reid, et al. J. Livingston, P. Russell, J. Redemann, B. Schmid, H. Maring, D. Savoie, E. J. Welton, J. Campbell, B. N. Holben, and R. C. Levy. 2003. "Saharan dust transport to the Caribbean during PRIDE: 2. Transport, vertical profiles, and deposition in simulations of in situ and remote sensing observations." J. Geophys. Res., 108 (D19): 8590 [10.1029/2002JD002659]

    Mcgill, M. J., D. L. Hlavka, W. D. Hart, E. J. Welton, and J. Campbell. 2003. "Airborne lidar measurements of aerosol optical properties during SAFARI-2000." J. Geophys. Res., 108 (D13): [10.1029/2002JD002370]

    Wang, J.-J., R. Flagan, J. Seinfeld, et al. H. Jonsson, D. R. Collins, P. B. Russell, B. Schmid, J. Redemann, J. Livingston, S. Gao, D. Hegg, E. J. Welton, and D. Bates. 2002. "Clear-column radiative closure during ACE-Asia: Comparison of multiwavelength extinction derived from particle size and composition with results from Sun photometry." J Geophys Res, 107 (D23): 4688 [10.1029/2002JD002465]

    Quinn, P., D. Coffman, T. Bates, et al. T. Miller, J. Johnson, E. J. Welton, C. Neususs, M. Miller, and P. Sheridan. 2002. "Aerosol optical properties during INDOEX 1999: Means, variability, and controlling factors." J. Geophys. Res., 107 (D19): 8020 [10.1029/2000JD000037]

    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]

    Quinn, P., D. Coffman, T. Bates, et al. T. Miller, J. Johnson, K. Voss, E. J. Welton, and C. Neusüss. 2001. "Dominant aerosol chemical components and their contribution to extinction during the Aerosols99 cruise across the Atlantic." J Geophys Res, 106 (D18): 20783-20809 [10.1029/2000JD900577]

    Voss, K., E. J. Welton, P. Quinn, et al. R. Frouin, M. Miller, and M. Reynolds. 2001. "Aerosol optical depth measurements during the Aerosols99 experiment." J Geophys Res, 106 (D18): 20,811-20,820 [10.1029/2000JD900783]

    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.

    Voss, K., E. J. Welton, P. Quinn, et al. J. Johnson, A. Thompson, and H. Gordon. 2001. "Lidar measurements during Aerosols99." J Geophys Res, 106: 20821-20832.

    Campbell, J. R., E. J. Welton, and J. D. Spinhirne. 2001. "Measurements of Polar Cloud Properties Through Continuous Long-Term Lidar Observation." Optical Remote Sensing of Atmosphere Meeting, Coeur d'Alene, ID.

    Schmid, B., J. Livingston, P. B. Russell, et al. P. Durkee, H. Jonsson, D. Collins, R. Flagan, J. Seinfeld, S. Gassó, D. Hegg, E. Öström, K. Noone, E. J. Welton, K. Voss, H. Gordon, P. Formenti, and M. Andreae. 2000. "Clear-sky closure studies of lower tropospheric aerosol and water vapor during ACE-2 using airborne sunphotometer, airborne in-situ, space-borne, and ground-based measurements." Tellus B, 52 (2): 568-593 [10.1034/j.1600-0889.2000.00009.x]

    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]

    Smirnov, A., B. N. Holben, I. Slutsker, E. J. Welton, and P. Formenti. 1998. "Optical Properties of Saharan Dust During ACE-2." J Geophysical Research, 103: 28078-28092.

    Non-Refereed

    Spinhirne, J., S. P. Palm, D. L. Hlavka, et al. W. D. Hart, A. Mahesh, and E. J. Welton. 2005. "Aerosol and cloud observations and data products by the GLAS Polar Orbiting Lidar Instruments." AMS 85th Annual Meeting San Diego, CA.

    Hlavka, D. L., S. P. Palm, E. J. Welton, et al. W. D. Hart, J. Spinhirne, M. J. Mcgill, and A. Mahesh. 2001. "Global Lidar Measurements of Clouds and Aerosols from Space Using the Geoscience Laser Altimeter System (GLAS)." 2001 AGU Fall Meeting San Francisco, CA.

    Welton, E. J., J. D. Spinhirne, J. R. Campbell, T. A. Berkoff, and D. Bates. 2001. "Measurements of the Vertical Structure of Aerosol and Clouds Over the Ocean using Micro-Pulse LIDAR Systems." SIMBIOS Project Annual Report

    Palm, S. P., D. L. Hlavka, B. Hart, E. J. Welton, and J. Spinhirne. 2000. "The Atmospheric Channels of GLAS: Near Real-Time Global Lidar Remote Sensing of Clouds and Aerosols from Space." 20th Internationl Laser Radar Conference Vichy, France.

    Welton, E. J., P. J. Flatau, K. J. Voss, et al. H. R. Gordon, K. Markowicz, J. R. Campbell, and J. D. Spinhirne. 1999. "Measurements of the Vertical Distribution of Aerosols and Clouds During INDOEX 1999 Using Micro-pulse Lidars." 1999 AGU Fall Meeting San Francisco, CA.

    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.

    Publications

    Refereed

    Giles, D. M., A. Sinyuk, M. G. Sorokin, et al. J. S. Schafer, A. Smirnov, I. Slutsker, T. F. Eck, B. N. Holben, J. R. Lewis, J. R. Campbell, E. J. Welton, S. V. Korkin, and A. I. Lyapustin. 2019. "Advancements in the Aerosol Robotic Network (AERONET) Version 3 database – automated near-real-time quality control algorithm with improved cloud screening for Sun photometer aerosol optical depth (AOD) measurements." Atmospheric Measurement Techniques 12 (1): 169-209 [10.5194/amt-12-169-2019]

    Hegarty, J. D., J. Lewis, E. L. McGrath-Spangler, et al. J. Henderson, A. J. Scarino, P. DeCola, R. Ferrare, M. Hicks, R. D. Adams-Selin, and E. J. Welton. 2018. "Analysis of the Planetary Boundary Layer Height during DISCOVER-AQ Baltimore–Washington, D.C., with Lidar and High-Resolution WRF Modeling." Journal of Applied Meteorology and Climatology 57 (11): 2679-2696 [10.1175/jamc-d-18-0014.1]

    Lolli, S., P. Di Girolamo, B. Demoz, X. Li, and E. J. Welton. 2017. "Rain evaporation rate estimates from multi-wavelength lidar measurements and intercomparison against a model analytical solution." Journal of Atmospheric and Oceanic Technology 34 (4): [10.1175/JTECH-D-16-0146.1]

    Tsay, S.-C., H. B. Maring, N.-H. Lin, et al. S. Buntoung, S. Chantara, H.-C. Chuang, P. M. Gabriel, C. Goodloe, B. N. Holben, T.-C. Hsiao, N.-Y. C. Hsu, S. Janjai, W. K. Lau, C.-T. Lee, J. Lee, A. M. Loftus, A. X. Nguyen, C. M. Nguyen, S. K. Pani, P. Pantina, A. M. Sayer, W.-K. Tao, S.-H. Wang, E. J. Welton, W. Wiriya, and M.-C. Yen. 2016. "Satellite-Surface Perspectives of Air Quality and Aerosol-Cloud Effects on the Environment: An Overview of 7-SEAS/BASELInE." Aero. Air Qual. Res. 16 (11): 2581-2602 [10.4209/aaqr.2016.08.0350]

    Lee, J., N.-Y. C. Hsu, C. Bettenhausen, et al. A. M. Sayer, C. J. Seftor, M.-J. Jeong, S.-C. Tsay, E. J. Welton, S.-H. Wang, and W.-N. Chen. 2016. "Evaluating the Height of Biomass Burning Smoke Aerosols Retrieved from Synergistic Use of Multiple Satellite Sensors over Southeast Asia." Aero. Air Qual. Res. 16 2897-2906 [10.4209/aaqr.2015.08.0506]

    Lolli, S., J. R. Lewis, E. J. Welton, J. R. Campbell, and Y. Gu. 2016. "Understanding Seasonal Variability in thin Cirrus Clouds from Continuous MPLNET Observations at GSFC in 2012." EPJ Web of Conferences 119 11004 [10.1051/epjconf/201611911004]

    Campbell, J. R., S. Lolli, J. R. Lewis, Y. Gu, and E. J. Welton. 2016. "Daytime Cirrus Cloud Top-of-Atmosphere Radiative Forcing Properties at a Midlatitude Site and their Global Consequence." Journal of Applied Meteorology and Climatology JAMC-D-15-0217.1 [10.1175/jamc-d-15-0217.1]

    Lolli, S., J. R. Lewis, J. R. Campbell, E. J. Welton, and Y. Gu. 2016. "Cirrus cloud radiative characteristics from continuous MPLNET profiling at GSFC in 2012." Optica Pura y Aplicada 49 (1): 1-6 [10.7149/opa.49.1.1]

    Campbell, J. R., C. Ge, J. Wang, et al. E. J. Welton, A. Bucholtz, E. J. Hyer, E. A. Reid, B. N. Chew, S.-C. Liew, S. V. Salinas, S. Lolli, K. C. Kaku, P. Lynch, M. Mahmud, M. Mohamad, and B. N. Holben. 2016. "Applying Advanced Ground-Based Remote Sensing in the Southeast Asian Maritime Continent to Characterize Regional Proficiencies in Smoke Transport Modeling." Journal of Applied Meteorology and Climatology 55 (1): 3-22 [10.1175/jamc-d-15-0083.1]

    Wang, S.-H., E. J. Welton, B. N. Holben, et al. S.-C. Tsay, N.-H. Lin, D. M. Giles, S. A. Stewart, S. Janjai, X. A. Nguyen, T.-C. Hsiao, W.-N. Chen, T.-H. Lin, S. Buntoung, S. Chantara, and W. Wiriya. 2015. "Vertical Distribution and Columnar Optical Properties of Springtime Biomass-Burning Aerosols over Northern Indochina during 2014 7-SEAS Campaign." Aerosol and Air Quality Research 15 2037-2050 [10.4209/aaqr.2015.05.0310]

    Nowottnick, E. P., P. R. Colarco, E. J. Welton, and A. M. Da Silva. 2015. "Use of the CALIOP vertical feature mask for evaluating global aerosol models." Atmospheric Measurement Techniques 8 3647-3669 [10.5194/amt-8-3647-2015]

    Lolli, S., E. J. Welton, J. R. Campbell, et al. E. Eloranta, B. N. Holben, B. N. Chew, and S. Salinas. 2014. "High Spectral Resolution Lidar and MPLNET Micro Pulse Lidar aerosol optical property retrieval intercomparison during the 2012 7-SEAS field campaign at Singapore." SPIE Proc. 9246 [doi:10.1117/12.2067812]

    Lolli, S., E. J. Welton, A. Benedetti, et al. L. Jones, M. Suttie, and S.-H. Wang. 2014. "MPLNET lidar data assimilation in the ECMWF MACC-II Aerosol system: evaluation of model performances at NCU lidar station." SPIE proc. 9246 [doi:10.1117/12.2068201]

    Tan, F. Y., W. S. Hee, S. L. Hwee, et al. K. Abdullah, L. Y. Tiem, M. Z. Matjafri, S. Lolli, B. Holben, and E. J. Welton. 2014. "Variation in daytime troposphereic aerosol via LIDAR and sunphotometer measurements in Penang, Malaysia." AIP Conference Proceedings 1588 (1): 286-292 [10.1063/1.4866962]

    Eck, T. F., B. N. Holben, J. S. Reid, et al. A. Arola, R. A. Ferrare, C. A. Hostetler, S. N. Crumeyrolle, T. A. Berkoff, E. J. Welton, S. Lolli, A. I. Lyapustin, Y. Wang, J. S. Schafer, D. M. Giles, B. E. Anderson, K. L. Thornhill, P. Minnis, K. E. Pickering, C. P. Loughner, A. Smirnov, and A. Siniuk. 2014. "Observations of rapid aerosol optical depth enhancements in the vicinity of polluted cumulus clouds." Atmos. Chem. Phys. 14 11633-11656 [10.5194/acp-14-11633-2014]

    Aryal, R. P., K. J. Voss, W. C. Keene, et al. J. L. Moody, E. J. Welton, and B. N. Holben. 2014. "Comparison of surface and column measurements of aerosol scattering properties over the western North Atlantic Ocean at Bermuda." Atmos. Chem. Phys. 14 7617-7629 [10.5194/acp-14-7617-2014]

    Matsui, T., C. M. Ichoku, C. A. Randles, et al. T. L. Yuan, A. M. Da Silva, P. R. Colarco, D. Kim, R. C. Levy, A. M. Sayer, M. Chin, D. Giles, B. N. Holben, E. J. Welton, T. F. Eck, and L. A. Remer. 2014. "Current and Future Perspectives of Aerosol Research at NASA Goddard Space Flight Center." Bulletin of the American Meteorological Society early view [10.1175/ BAMS-D-13-00153.1]

    Welton, E. J., 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

    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

    Wang, S.-H., S.-C. Tsay, N.-H. Lin, et al. S.-C. Chang, C. Li, E. J. Welton, B. N. Holben, N.-Y. C. Hsu, W. K. Lau, S. Lolli, C.-C. Kuo, H.-P. Chia, C.-Y. Chiu, C.-C. Lin, S. W. Bell, Q. Ji, R. A. Hansell, G.-R. Sheu, K.-H. Chi, and C.-M. Peng. 2013. "Origin, transport, and vertical distribution of atmospheric pollutants over the northern South China Sea during the 7-SEAS/Dongsha Experiment." Atmospheric Environment 78 124-133 [10.1016/j.atmosenv.2012.11.013]

    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]

    Tsay, S.-C., N.-Y. C. Hsu, W. K. Lau, et al. C. Li, P. M. Gabriel, Q. Ji, B. N. Holben, E. J. Welton, X. A. Nguyen, S. Janjai, N. H. Lin, J. S. Reid, J. Boonjawat, S. G. Howell, B. Huebert, J. S. Fu, R. A. Hansell, A. M. Sayer, R. Gautam, S.-H. Wang, C. S. Goodloe, L. R. Miko, P. K. Shu, A. M. Loftus, J. Huang, J. Y. Kim, M.-J. Jeong, and P. Pantina. 2013. "From BASE-ASIA toward 7-SEAS: A satellite-surface perspective of boreal spring biomass-burning aerosols and clouds in Southeast Asia." Atmospheric Environment 78 20-34 [10.1016/j.atmosenv.2012.12.013]

    Salinas, S., B. N. Chew, J. Miettinen, et al. J. R. Campbell, E. J. Welton, J. S. Reid, L. E. Yu, and S. C. Liew. 2013. "Physical and optical characteristics of the October 2010 haze event over Singapore: A photometric and lidar analysis." Atmospheric Research 122 555-570 [10.1016/j.atmosres.2012.05.021]

    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]

    Huang, J., N.-Y. C. Hsu, S.-C. Tsay, et al. B. N. Holben, E. J. Welton, A. Smirnov, M.-J. Jeong, R. A. Hansell, T. A. Berkoff, Z. Liu, G.-R. Liu, J. R. Campbell, S. C. Liew, and J. E. Barnes. 2012. "Evaluations of cirrus contamination and screening in ground aerosol observations using collocated lidar systems." J. Geophys. Res. 117 (D15): D15204 [10.1029/2012JD017757]

    Hansell, R. A., S.-C. Tsay, N.-Y. C. Hsu, et al. Q. Ji, S. W. Bell, B. N. Holben, E. J. Welton, T. L. Roush, W. Zhang, J. Huang, Z. Li, and H. Chen. 2012. "An assessment of the surface longwave direct radiative effect of airborne dust in Zhangye, China, during the Asian Monsoon Years field experiment (2008)." J. Geophys. Res. 117 (D16): D00K39 [10.1029/2011JD017370]

    Colarco, P. R., L. A. Remer, R. A. Kahn, R. C. Levy, and E. J. Welton. 2012. "Implications of satellite swath width on global aerosol optical thickness statistics." Atmos. Meas. Tech. Discuss. 5 (2): 2795-2820 [10.5194/amtd-5-2795-2012]

    Misra, A., S. N. Tripathi, D. S. Kaul, and E. J. Welton. 2012. "Study of MPLNET-Derived Aerosol Climatology over Kanpur, India, and Validation of CALIPSO Level 2 Version 3 Backscatter and Extinction Products." Journal of Atmospheric and Oceanic Technology 29 (9): 1285-1294 [10.1175/JTECH-D-11-00162.1]

    Campbell, J., E. J. Welton, N. A. Krotkov, et al. K. Yang, S. A. Stewart, and M. Fromm. 2012. "Likely seeding of cirrus clouds by stratospheric Kasatochi volcanic aerosol particles near a mid-latitude tropopause fold." Atmospheric Environment 46 441-448 [10.1016/j.atmosenv.2011.09.027]

    Huang, J., N.-Y. C. Hsu, S.-C. Tsay, et al. M.-J. Jeong, B. N. Holben, T. A. Berkoff, and E. J. Welton. 2011. "Susceptibility of aerosol optical thickness retrievals to thin cirrus contamination during the BASE-ASIA campaign." J. Geophys. Res. 116 (D8): D08214 [10.1029/2010JD014910]

    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]

    Berkoff, T., S. Mikail, S. Tom, et al. F. Thomas, H. Raymond, E. J. Welton, and H. Brent. 2011. "Nocturnal Aerosol Optical Depth Measurements with a Small-Aperture Automated Photometer Using the Moon as a Light Source." Journal of Atmospheric and Oceanic Technology 28 (10): 1297–1306 [10.1175/JTECH-D-10-05036.1]

    Liu, Y., W. Zifeng, W. Jun, et al. A. Richard, K. Robert, and E. J. Welton. 2011. "The effect of aerosol vertical profiles on satellite-estimated surface particle sulfate concentrations." Remote Sensing of Environment 115 (2): 508-513 [10.1016/j.rse.2010.09.019]

    Chew, B., R. James, S. Jeffery, et al. M. David, E. J. Welton, V. Santo, and C. Soo. 2011. "Tropical cirrus cloud contamination in sun photometer data." Atmospheric Environment 45 (37): 6724-6731 [10.1016/j.atmosenv.2011.08.017]

    Liu, J., Z. Youfei, L. Zhanqing, et al. F. Connor, E. J. Welton, and C. Mareen. 2011. "Transport, vertical structure and radiative properties of dust events in southeast China determined from ground and space sensors." Atmospheric Environment 45 (35): 6469-6480 [10.1016/j.atmosenv.2011.04.031]

    Miller, D., S. Kang, A. Mark, et al. K. David, D. Oleg, E. J. Welton, M. David, and G. Paul. 2011. "Assessing boreal forest fire smoke aerosol impacts on U.S. air quality: A case study using multiple data sets." J. Geophys. Res. 116 (D22): D22209 [10.1029/2011JD016170]

    Wang, S.-H., N.-H. Lin, M.-D. Chou, et al. S.-C. Tsay, E. J. Welton, N.-Y. C. Hsu, D. M. Giles, G.-R. Liu, and B. N. Holben. 2010. "Profiling transboundary aerosols over Taiwan and assessing their radiative effects." J. Geophys. Res. 115 (D7): D00K31 [10.1029/2009JD013798]

    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]

    Ganguly, D., P. Ginoux, V. Ramaswamy, et al. O. Dubovik, E. J. Welton, E. Reid, and B. Holben. 2009. "Inferring the composition and concentration of aerosols by combining AERONET and MPLNET data: Comparison with other measurements and utilization to evaluate GCM output." J. Geophys. Res. 114 (D16): D16203 [10.1029/2009JD011895]

    Campbell, J., K. Sassen, and E. J. Welton. 2008. "Elevated Cloud and Aerosol Layer Retrievals from Micropulse Lidar Signal Profiles." J. Atmos. Ocean. Tech. 25 (5): 685-700 [10.1175/2007JTECHA1034.1]

    Kuzmanoski, M., M. Box, B. Schmid, et al. G. Box, J.-J. Wang, P. Russel, D. Bates, H. Johnson, E. J. Welton, R. Flagan, and J. Seinfield. 2007. "Aerosol properties computed aircraft-based observations during the ACE-Asia campaign: 2. A case study of lidar ratio closure and aerosol radiative effects." Aerosol Sci Tech 41 (3): 231-243 [10.1080/02786820601146977]

    Lund, M., C. Toledano, G. Myhre, et al. K. Stebel, K. Yttri, V. Aaltonen, M. Johnsrud, M. Frioud, V. Cachorro, A. Frutos, H. Lihavainen, J. Campell, A. Chaikovsky, M. Shiobara, E. J. Welton, and K. Torseth. 2007. "Regional aerosol optical properties and radiative impact of the extreme smoke event in the European Arctic in Spring 2006." J Polar Meteor and Glaciology 7 5899-5915

    Myhre, C. L., C. Toledano, G. Myhre, et al. K. Stebel, K. Yttri, V. Aaltonen, M. Johnsrud, M. Frioud, V. Cachorro, A. de Frutos, H. Lihavainen, J. Campell, A. Chaikovsky, M. Shiobara, E. J. Welton, and K. Torseth. 2007. "Regional aerosol optical properties and radiative impact of the extreme smoke event in the European Arctic in Spring 2006." J Polar Meteor and Glaciology 7 5899-5915

    Shiobara, M., W. D. Hart, J. Campbell, et al. E. J. Welton, J. Spinhirne, R. Neuber, M. Yabuki, and T. A. Berkoff. 2006. "Arctic experiment for the ICESat/GLAS ground validation with a Micro-Pulse Lidar at Ny-Alesund, Svalbard." Polar Meteorol. Glaciol. 20 28-39 [Full Text (Link)]

    Schmid, B., R. Ferrare, C. Flynn, et al. R. Elleman, D. Covert, A. Strawa, E. Welton, D. Turner, H. Jonsson, J. Redemann, J. Eilers, K. Ricci, A. Hallar, M. Clayton, J. Michalsky, A. Smirnov, B. N. Holben, and J. Barnard. 2006. "How well do state-of-the-art techniques measuring the vertical profile of tropospheric aerosol extinction compare?" J Geophys Res 111 (D05S07): 25 pp

    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]

    Torres, O., P. K. Bhartia, A. Syniuk, E. J. Welton, and B. N. Holben. 2005. "Total Ozone Mapping Spectrometer measurements of aerosol absorption from space: Comparison to SAFARI 2000 ground-based observations." J. Geophys. Res. 110 (D10): D10S18 [10.1029/2004JD004611]

    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]

    Hlavka, D. L., E. J. Welton, M. J. Mcgill, et al. J. D. Spinhirne, W. D. Hart, and S. P. Palm. 2005. "Aerosol and cloud optical depth from GLAS: Results and verification for an October 2003 California fire smoke case." Geophysical Research Letters 32 (22): L22S07 [10.1029/2005GL023413]

    Quinn, P., D. Coffman, T. Bates, et al. E. J. Welton, D. Covert, T. Miller, J. Johnson, S. Maria, L. Russell, R. Arimoto, C. Carrico, M. Rood, and J. Anderson. 2004. "Aerosol optical properties measured on board the Ronald H Brown during ACE-Asia as a function of Aerosol chemical composition and source region." J. Geophys. Res. Atmos. 109 (D19): D19S01 [10.1029/2003JD004010]

    Kahn, R., J. Anderson, T. Anderson, et al. T. Bates, F. Brechtel, A. Clarke, E. Dutton, R. Flagan, R. Frouin, H. Fukushima, B. Holben, S. Howell, B. Huebert, A. Jefferson, H. Jonsson, K. Carricol, O. Kalashnikova, J. Kim, S. Kim, P. Kus, W. Li, J. Livingston, S. Masonis, C. McNaughton, J. Merrill, S. Mukai, T. Murayama, T. Nakajima, P. Quinn, J. Redemann, M. Rood, P. Russell, I. Sano, B. Schmid, J. Seinfeld, N. Sugimoto, J. Wang, E. J. Welton, J. Won, and S. Yoon. 2004. "Environmental snapshots from ACE-Asia." J. Geophys. Res. 109 (D19): D19S14 [10.1029/2003JD004339]

    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]

    Schmid, B., J. Redemann, P. Russell, et al. P. Hobbs, D. L. Hlavka, M. J. Mcgill, B. Holben, E. J. Welton, J. Campbell, O. Torres, R. A. Kahn, D. Diner, M. Helmlinger, D. Chu, C. RoblesGonzalez, and G. deLeeuw. 2003. "Coordinated airborne, spaceborne, and ground-based measurements of massive thick aerosol layers during the dry season in southern Africa." J. Geophys. Res. 108 (D13): 8496 [10.1029/2002JD002297]

    Livingston, J., P. Russell, J. Reid, et al. J. Redemann, B. Schmid, D. Allen, O. Torres, R. Levy, L. Remer, B. Holben, A. Smirnov, O. Dubovik, E. J. Welton, J. Campbell, J. Wang, and S. Christopher. 2003. "Airborne Sun photometer measurements of aerosol optical depth and columnar water vapor during the Puerto Rico Dust Experiment and comparison with land, aircraft, and satellite measurements." J Geophys Res 108 (D19): 8588 [10.1029/2002JD002520]

    Reid, J., J. Kinney, D. Westphal, et al. B. Holben, E. J. Welton, S.-C. Tsay, D. Eleuterio, J. Campbell, S. Christopher, P. R. Colarco, H. Jonsson, J. Livingston, H. Maring, M. Meier, P. Pilewskie, J. Prospero, E. Reid, L. Remer, P. Russell, D. Savoie, A. Smirnov, and D. Tanre. 2003. "Analysis of measurements of Saharan dust by airborne and ground-based remote sensing methods during the Puerto Rico Dust Experiment (PRIDE)." J. Geophys. Res. 108 (D19): 8586 [10.1029/2002JD002493]

    Schmid, B., D. Hegg, J. Wang, et al. D. Bates, J. Redemann, P. Russell, J. Livingston, H. Jonsson, E. J. Welton, J. Seinfeld, R. Flagan, D. Covert, O. Dubovik, and A. Jefferson. 2003. "Column closure studies of lower tropospheric aerosol and water vapor during ACE-Asia using airborne Sun photometer and airborne in situ and ship-based lidar measurements." J. Geophys. Res. 108 (D23): 8656 [10.1029/2002JD003361]

    Markowicz, K., P. Flatau, A. Vogelmann, P. Quinn, and E. J. Welton. 2003. "Clear-sky infrared aerosol radiative forcing at the surface and the top of the atmosphere." QJR Meteorl Soc 129 (594): 2927-2947 [10.1256/qj.02.224]

    Campbell, J., E. J. Welton, J. Spinhirne, et al. Q. Ji, S.-C. Tsay, S. Piketh, M. Barenbrug, and B. Holben. 2003. "Micropulse lidar observations of tropospheric aerosols over northeastern South Africa during the ARREX and SAFARI 2000 dry season experiments." J Geophys Res 108 (D13): 8497 [10.1029/2002JD002563]

    Colarco, P. R., O. Toon, J. Reid, et al. J. Livingston, P. Russell, J. Redemann, B. Schmid, H. Maring, D. Savoie, E. J. Welton, J. Campbell, B. N. Holben, and R. C. Levy. 2003. "Saharan dust transport to the Caribbean during PRIDE: 2. Transport, vertical profiles, and deposition in simulations of in situ and remote sensing observations." J. Geophys. Res. 108 (D19): 8590 [10.1029/2002JD002659]

    Mcgill, M. J., D. L. Hlavka, W. D. Hart, E. J. Welton, and J. Campbell. 2003. "Airborne lidar measurements of aerosol optical properties during SAFARI-2000." J. Geophys. Res. 108 (D13): [10.1029/2002JD002370]

    Wang, J.-J., R. Flagan, J. Seinfeld, et al. H. Jonsson, D. R. Collins, P. B. Russell, B. Schmid, J. Redemann, J. Livingston, S. Gao, D. Hegg, E. J. Welton, and D. Bates. 2002. "Clear-column radiative closure during ACE-Asia: Comparison of multiwavelength extinction derived from particle size and composition with results from Sun photometry." J Geophys Res 107 (D23): 4688 [10.1029/2002JD002465]

    Quinn, P., D. Coffman, T. Bates, et al. T. Miller, J. Johnson, E. J. Welton, C. Neususs, M. Miller, and P. Sheridan. 2002. "Aerosol optical properties during INDOEX 1999: Means, variability, and controlling factors." J. Geophys. Res. 107 (D19): 8020 [10.1029/2000JD000037]

    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]

    Quinn, P., D. Coffman, T. Bates, et al. T. Miller, J. Johnson, K. Voss, E. J. Welton, and C. Neusüss. 2001. "Dominant aerosol chemical components and their contribution to extinction during the Aerosols99 cruise across the Atlantic." J Geophys Res 106 (D18): 20783-20809 [10.1029/2000JD900577]

    Voss, K., E. J. Welton, P. Quinn, et al. R. Frouin, M. Miller, and M. Reynolds. 2001. "Aerosol optical depth measurements during the Aerosols99 experiment." J Geophys Res 106 (D18): 20,811-20,820 [10.1029/2000JD900783]

    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

    Voss, K., E. J. Welton, P. Quinn, et al. J. Johnson, A. Thompson, and H. Gordon. 2001. "Lidar measurements during Aerosols99." J Geophys Res 106 20821-20832

    Campbell, J. R., E. J. Welton, and J. D. Spinhirne. 2001. "Measurements of Polar Cloud Properties Through Continuous Long-Term Lidar Observation." Optical Remote Sensing of Atmosphere Meeting

    Schmid, B., J. Livingston, P. B. Russell, et al. P. Durkee, H. Jonsson, D. Collins, R. Flagan, J. Seinfeld, S. Gassó, D. Hegg, E. Öström, K. Noone, E. J. Welton, K. Voss, H. Gordon, P. Formenti, and M. Andreae. 2000. "Clear-sky closure studies of lower tropospheric aerosol and water vapor during ACE-2 using airborne sunphotometer, airborne in-situ, space-borne, and ground-based measurements." Tellus B 52 (2): 568-593 [10.1034/j.1600-0889.2000.00009.x]

    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]

    Smirnov, A., B. N. Holben, I. Slutsker, E. J. Welton, and P. Formenti. 1998. "Optical Properties of Saharan Dust During ACE-2." J Geophysical Research 103 28078-28092

    Non-Refereed

    Spinhirne, J., S. P. Palm, D. L. Hlavka, et al. W. D. Hart, A. Mahesh, and E. J. Welton. 2005. "Aerosol and cloud observations and data products by the GLAS Polar Orbiting Lidar Instruments." AMS 85th Annual Meeting

    Hlavka, D. L., S. P. Palm, E. J. Welton, et al. W. D. Hart, J. Spinhirne, M. J. Mcgill, and A. Mahesh. 2001. "Global Lidar Measurements of Clouds and Aerosols from Space Using the Geoscience Laser Altimeter System (GLAS)." 2001 AGU Fall Meeting

    Welton, E. J., J. D. Spinhirne, J. R. Campbell, T. A. Berkoff, and D. Bates. 2001. "Measurements of the Vertical Structure of Aerosol and Clouds Over the Ocean using Micro-Pulse LIDAR Systems." SIMBIOS Project Annual Report

    Palm, S. P., D. L. Hlavka, B. Hart, E. J. Welton, and J. Spinhirne. 2000. "The Atmospheric Channels of GLAS: Near Real-Time Global Lidar Remote Sensing of Clouds and Aerosols from Space." 20th Internationl Laser Radar Conference

    Welton, E. J., P. J. Flatau, K. J. Voss, et al. H. R. Gordon, K. Markowicz, J. R. Campbell, and J. D. Spinhirne. 1999. "Measurements of the Vertical Distribution of Aerosols and Clouds During INDOEX 1999 Using Micro-pulse Lidars." 1999 AGU Fall Meeting

                                                                                                                                                                                            
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