Dr. James H. Crawford is NASA’s Senior Scientist for Atmospheric Chemistry. In this position, he serves as the agency lead on tropospheric chemistry and air quality. His duties include providing leadership for national and international airborne field studies that collect detailed measurements of atmospheric composition to identify human and natural impacts related to gaseous and particulate pollution. His research interests include the photochemistry of tropospheric ozone and free radicals, the global budget of reactive nitrogen, the influence of clouds on trace gas transport and chemistry, the development of satellite proxies linking precursor distributions to secondary ozone and particulate pollution, and the integration of satellite observations and in situ surface and airborne observations with models to address long-range pollution transport and local air quality. Since 2010, Dr. Crawford has led a series of air quality focused field studies across the United States (DISCOVER-AQ and FIREX-AQ) and in South Korea (KORUS-AQ) to understand local and transboundary influences on air quality and to prepare for geostationary satellite observations of air quality planned by Korea and the U.S. in the early 2020s. Notable community service includes serving as the atmospheric chemistry editor for the Journal of Geophysical Research-Atmospheres (2013-2019) and serving as a member and co-chair of the International Global Atmospheric Chemistry (IGAC) project Steering Committee (2015-2022). Dr. Crawford received his Ph.D. in Atmospheric Chemistry from the Georgia Institute of Technology in 1997, and his B.S. in Mathematics from the United States Military Academy in 1986.
Prof. dr. Pieternel F. Levelt is director of NCAR-ACOM in Boulder, Colorado since June 2021. Before that she was for more than a decade department head of the R&D department on Satellite Observations at KNMI (Royal Netherlands Meteorological Institute) in The Netherlands. She still is affiliated to KNMI, and also to University of Technology Delft, where she is professor in Remote Sensing of the Earth Atmosphere. She is further Principal Investigator of the Ozone Monitoring Instrument (OMI) and scientific founder of the Tropospheric Monitoring Instrument (TROPOMI).
Dr. Nga Lee (Sally) Ng is a professor and Tanner Faculty Fellow in the School of Chemical & Biomolecular Engineering and the School of Earth & Atmospheric Sciences at the Georgia Institute of Technology. She earned her doctorate in Chemical Engineering from the California Institute of Technology and was a postdoctoral scientist at Aerodyne Research Inc. Dr. Ng’s research focuses on the understanding of the chemical mechanisms of aerosol formation and composition, as well as their health effects. Her group combines laboratory chamber studies and ambient field measurements to study aerosols using advanced mass spectrometry techniques. Dr. Ng serves as a co-editor of Atmospheric Chemistry and Physics and a member of the Editorial Board of Scientific Reports and ACS Earth and Space Chemistry. Dr. Ng’s research contribution has also been recognized by the Sheldon K. Friedlander Award and the Kenneth T. Whitby Award from the American Association for Aerosol Research, the EPA Early Career Award, the Health Effects Institute Walter A. Rosenblith New Investigator Award, and the NSF CAREER Award.