Sciences and Exploration Directorate

Ellsworth J Welton

(RSCH AST, EARTH SCIENCES REMOTE SENS)

 ellsworth.j.welton@nasa.gov

 301.614.6279

Org Code: 612

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)

Aerosols

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


 2000 - present

NASA Micro Pulse Lidar Network (MPLNET) - NASA - Awarded: 2000-01-01


Dates: 2000-01-01  - 


2011 - 2014

AERONET/MPLNET SEAC4RS - NASA - Awarded: 2011-01-01


Dates:  - 


2011 - 2013 

CATS ISS Mission - NASA - Awarded: 2011-01-01


Dates:  - 


2010 - 2013

CALIPSO GEOS-5 Analysis - NASA - Awarded: 2010-01-01


Dates:  - 


2008 - 2009

Goddard IRAD, ACE Laser Development - NASA Goddard - Awarded: 2008-01-01


Dates:  - 


2007 - 2008

Goddard IRAD, ACE Multi-Beam Lidar - NASA Goddard - Awarded: 2007-01-01


Dates:  - 


2007 - 2010

DECISIONS, Improvement of PBL Parameterization in NCEP - NASA - Awarded: 2007-01-01


Dates:  - 


2007 - 2010

CALIPSO Data Assimilation in NAAPS - NASA - Awarded: 2007-01-01


Dates:  - 


2007 - 2010 

CALIPSO Data Assimilation in GEOS5 - NASA - Awarded: 2007-01-01


Dates:  - 


2006 - 2007

Goddard IRAD, Climate 1 Mission - NASA Goddard - Awarded: 2006-01-01


Dates:  - 


2006 - 2007

Goddard IRAD, Biomm-L - NASA Goddard - Awarded: 2006-01-01


Dates:  - 


2004 - 2005 

Goddard IRAD, Fiber Laser Development - NASA Goddard - Awarded: 2004-01-01


Dates:  - 


2003 - 2005 

DECISIONS, AERONET/MPLNET Synergy Tool - NASA - Awarded: 2003-01-01


Dates:  - 


2001 - 2002

SIMBIOS Lidar Observations - NASA - Awarded: 2001-01-01


Dates:  - 

Other Professional Information


Dr. Welton is the author and co-author of over 90 publications with an h-index of 42 (October 2023).

ORCID: 0000-0003-0208-4861

ResearcherID: A-8362-2012

Web of Science

Google Scholar

Research Gate

Publications


Refereed

Sicard, M., C. Córdoba-Jabonero, A. Barreto, et al. E. J. Welton, C. Gil-Díaz, C. V. Carvajal-Pérez, A. Comerón, O. García, R. García, M.-Á. López-Cayuela, C. Muñoz-Porcar, N. Prats, R. Ramos, A. Rodríguez-Gómez, C. Toledano, and C. Torres. 2022. Volcanic Eruption of Cumbre Vieja, La Palma, Spain: A First Insight to the Particulate Matter Injected in the Troposphere Remote Sensing 14 (10): 2470 [10.3390/rs14102470]

Osborne, M. J., J. de Leeuw, C. Witham, et al. A. Schmidt, F. Beckett, N. Kristiansen, J. Buxmann, C. Saint, E. J. Welton, J. Fochesatto, A. R. Gomes, U. Bundke, A. Petzold, F. Marenco, and J. Haywood. 2022. The 2019 Raikoke volcanic eruption – Part 2: Particle-phase dispersion and concurrent wildfire smoke emissions Atmospheric Chemistry and Physics 22 (5): 2975-2997 [10.5194/acp-22-2975-2022]

Loría‐Salazar, S. M., A. M. Sayer, J. Barnes, et al. J. Huang, C. Flynn, N. Lareau, J. Lee, A. Lyapustin, J. Redemann, E. J. Welton, J. L. Wilkins, and H. A. Holmes. 2021. Evaluation of Novel NASA Moderate Resolution Imaging Spectroradiometer and Visible Infrared Imaging Radiometer Suite Aerosol Products and Assessment of Smoke Height Boundary Layer Ratio During Extreme Smoke Events in the Western USA Journal of Geophysical Research: Atmospheres 126 (11): [10.1029/2020jd034180]

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]

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, 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]

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

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]

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]

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]

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 <i>Ronald H Brown</i> 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

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

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

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