November 13, 2017

November 13, 2017

What follows is a selection of recent first-author publications by GESTAR scientists across a variety of disciplines:

Knowland, K. E. (610.1/USRA), L. E. Ott (610.1), B. N. Duncan (614), and K. Wargan (610.1/SSAI) (2017), Stratospheric intrusion-influenced ozone air quality exceedances investigated in the NASA MERRA-2 Reanalysis, Geophys. Res. Lett., “NASA's Modern-Era Retrospective Analysis for Research and Applications Version-2 (MERRA-2) reanalysis is a publicly available high-resolution data set (∼50 km) with assimilated O3 that characterizes O3 on the same spatial and temporal resolutions as the meteorology. We demonstrate the science capabilities of the MERRA-2 reanalysis when applied to the evaluation of stratospheric intrusions that impact surface air quality.”

Ibrahim, A. (616/USRA), B. Franz (616), Z. Ahmad (616/JHT), et al. (2017),
Atmospheric correction for hyperspectral ocean color retrieval with application to the
Hyperspectral Imager for the Coastal Ocean (HICO), Remote Sensing of Environment, “This paper describes the atmospheric correction process for hyperspectral ocean color sensors such as the HICO instrument onboard the ISS. The work provides the basis of operational processing capabilities for the upcoming Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission by utilizing the proxy data available through HICO.”

Sayer, A. M. (613/USRA), N. C. Hsu (613), J. Lee (613/ESSIC), N. Carletta (SSAI), S.-H. Chen (613/SSAI), and A. Smirnov (618/SSAI) (2017), Evaluation of NASA Deep Blue/SOAR aerosol retrieval algorithms applied to AVHRR measurements, J. Geophys. Res. Atmos., 122, 9945–9967, doi:10.1002/2017JD026934. From JGR-Atmospheres: “Aerosols are small particles in the atmosphere like desert dust, volcanic ash, smoke, industrial haze, and sea spray. Understanding them is important for applications such as hazard avoidance, air quality and human health, and climate studies. Satellite instruments provide an important tool to study aerosol loadings over the world. This paper evaluates a new satellite-based data set of aerosol loading, from a set of instruments called the Advanced Very High Resolution Radiometers (AVHRRs), using ground-based observations and by comparing to other satellite data products.”

Strode, S. A. (614/USRA), A. R. Douglass (614), J. R. Ziemke (614/MSU), M. Manyin (614/SSAI), J. E. Nielsen (614/SSAI), and L. D. Oman (614) (2017), A Model and Satellite-Based Analysis of the Tropospheric Ozone Distribution in Clear versus Convectively Cloudy Conditions, J. Geophys. Res. Atmos., 122, doi:10.1002/2017JD027015. “This study presents a method for comparing a chemistry-climate model to OMI/MLS observations of in-cloud ozone. It quantifies the contributions of chemistry versus large-scale and convective transport to the ozone distribution in the mid-troposphere.”

Orbe, C. (610.1/JHU), L. D. Oman (614), S. E. Strahan (614/USRA), D. W. Waugh (610/JHU), L. L. Takacs (610.1/SSAI), S. Pawson (610.1), and A. Molod (610.1) (2017), Large-Scale Atmospheric Transport in GEOS Replay Simulations, J. Adv. Model. Earth Sy., doi:10.1002/2017MS001053. “This publication demonstrates the credibility of the replay technique in GEOS-5 simulations in terms of its ability to produce credible large-scale atmospheric transport compared to observations and other models.”


NASA Goddard Space Flight Center, in Greenbelt, Maryland, has been in operation for 50 years -- chartered on May 1, 1959. The Goddard Space Flight Center is a major U.S. laboratory for developing and operating unmanned scientific spacecraft. During the past 50-years, Goddard has been at the forefront in exploration, in technological achievement, in space science, and in studying the Earth as a system.


GESTAR conducts research collaboratively, mainly within NASA GSFC's Earth Sciences Division, but also with Solar Systems Exploration Division, Office of Education, and Office of Public Affairs. Scientists and staff at GESTAR, in collaboration with NASA and other investigators, conceive and develop new, space-based missions; provide mission requirements; conduct research that explains the behavior of Earth and other planetary systems; and create engaging media that tell NASA's story of exploration and discovery on Earth and beyond.


Universities Space Research Association (USRA) is an independent, nonprofit research corporation where the combined efforts of in-house talent and university-based expertise merge to advance space science and technology. USRA works across disciplines including biomedicine, astrophysics, and engineering and integrates those competencies into applications ranging from fundamental research to facility management and operations. USRA engages the creativity and authoritative expertise of the research community to develop and deliver sophisticated, forward-looking solutions to Federal agencies and other government sponsors.